Pub Date : 2020-01-01DOI: 10.5455/egyjebb.20200605025834
Mahmoud Abdelhaak, Dina Gad
{"title":"Impacts of salinity, yeast extract and drought treatments on Silybum marianum L. seed-silymarin content and constituents","authors":"Mahmoud Abdelhaak, Dina Gad","doi":"10.5455/egyjebb.20200605025834","DOIUrl":"https://doi.org/10.5455/egyjebb.20200605025834","url":null,"abstract":"","PeriodicalId":22404,"journal":{"name":"THE EGYPTIAN JOURNAL OF EXPERIMENTAL BIOLOGY (Botany)","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77610747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.5455/EGYJEBB.20190301092631
Lamiaa Farouq Shalabiı, Y. Masrahi
The Floristic composition, life forms and phytogeographical iaffinities were conducted in Al-Hashr Mountain, Southwestern iSaudi Arabia. In total, 116 plant species belonging to 95 genera iand 47 families were collected and identified. Asteraceae and iPoaceae were the most important families in terms of species irichness. The life forms spectrum was dominated by ichamaephytes, while the remainders were therophytes and iphanerophytes, denoting phytoclimate of semi-arid mountainous ihabitat with topographical variation refuge many microhabitats, as iwell as anthropogenic factors. Due to its location, the study area, ias a part of southwestern Saudi Arabia, is a meeting place of isome phytogeographical regions of Holarctic and Palaeotropic, iwith high affinity to Sudano-Zambezian phytochorion, as well as ihigh degree of endemism of South Arabian. i
{"title":"Floristic composition, Life forms and Phytogeography of Al-Hashr Mountain, Jazan region, SW Saudi Arabia","authors":"Lamiaa Farouq Shalabiı, Y. Masrahi","doi":"10.5455/EGYJEBB.20190301092631","DOIUrl":"https://doi.org/10.5455/EGYJEBB.20190301092631","url":null,"abstract":"The Floristic composition, life forms and phytogeographical iaffinities were conducted in Al-Hashr Mountain, Southwestern iSaudi Arabia. In total, 116 plant species belonging to 95 genera iand 47 families were collected and identified. Asteraceae and iPoaceae were the most important families in terms of species irichness. The life forms spectrum was dominated by ichamaephytes, while the remainders were therophytes and iphanerophytes, denoting phytoclimate of semi-arid mountainous ihabitat with topographical variation refuge many microhabitats, as iwell as anthropogenic factors. Due to its location, the study area, ias a part of southwestern Saudi Arabia, is a meeting place of isome phytogeographical regions of Holarctic and Palaeotropic, iwith high affinity to Sudano-Zambezian phytochorion, as well as ihigh degree of endemism of South Arabian. i","PeriodicalId":22404,"journal":{"name":"THE EGYPTIAN JOURNAL OF EXPERIMENTAL BIOLOGY (Botany)","volume":"20 1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74340589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.5455/egyjebb.20191223054507
Sherien E. Sobhy, K. Allah, Essam Kassem, E. Hafez, N. Sewelam
Soil contamination with lead (Pb) represents a common heavy metal stress for cultivated plants. In the current study, effects of Pb stress on wheat (Triticum aestivum) plants were evaluated, and alleviating roles of purslane and chard natural weed extracts were assessed. The results showed that Pb treatment (100 mM) significantly reduced the growth of wheat seedlings and diminished plant yield parameters. Moreover, Pb stress inhibited photosynthetic activity measured as Fv/Fm. The levels of various stress markers increased under Pb stress as was verified by the increased electrolyte leakage, malondialdehyde (MDA) content, H2O2 and .OH radical content. Pb stress increased the activity of peroxidase (POX), catalase (CAT), superoxide dismutase (SOD), as well as raised the content of the antioxidant compound ascorbic acid. A remarkable induction in some genes was reported under Pb stress. The ameliorative role achieved by seed priming of wheat in purslane and chard weed extracts was demonstrated by the increase in growth parameters in seedling and yield stages. In the meantime, the priming treatments increased the Fv/Fm value. In addition, the activities of the antioxidant enzymes POX, CAT and SOD were reduced by seed priming. Data presented in the current work provide strong evidence that natural weed extracts are efficient to alleviate damaging effects of abiotic challenges such as heavy metal stress imposed by high soil Pb concentrations, and thus possibly could represent a valuable ecofriendly and commercial values for plant farmers.
{"title":"Seed priming in natural weed extracts represents a promising practice for alleviating lead stress toxicity","authors":"Sherien E. Sobhy, K. Allah, Essam Kassem, E. Hafez, N. Sewelam","doi":"10.5455/egyjebb.20191223054507","DOIUrl":"https://doi.org/10.5455/egyjebb.20191223054507","url":null,"abstract":"Soil contamination with lead (Pb) represents a common heavy metal stress for cultivated plants. In the current study, effects of Pb stress on wheat (Triticum aestivum) plants were evaluated, and alleviating roles of purslane and chard natural weed extracts were assessed. The results showed that Pb treatment (100 mM) significantly reduced the growth of wheat seedlings and diminished plant yield parameters. Moreover, Pb stress inhibited photosynthetic activity measured as Fv/Fm. The levels of various stress markers increased under Pb stress as was verified by the increased electrolyte leakage, malondialdehyde (MDA) content, H2O2 and .OH radical content. Pb stress increased the activity of peroxidase (POX), catalase (CAT), superoxide dismutase (SOD), as well as raised the content of the antioxidant compound ascorbic acid. A remarkable induction in some genes was reported under Pb stress. The ameliorative role achieved by seed priming of wheat in purslane and chard weed extracts was demonstrated by the increase in growth parameters in seedling and yield stages. In the meantime, the priming treatments increased the Fv/Fm value. In addition, the activities of the antioxidant enzymes POX, CAT and SOD were reduced by seed priming. Data presented in the current work provide strong evidence that natural weed extracts are efficient to alleviate damaging effects of abiotic challenges such as heavy metal stress imposed by high soil Pb concentrations, and thus possibly could represent a valuable ecofriendly and commercial values for plant farmers.","PeriodicalId":22404,"journal":{"name":"THE EGYPTIAN JOURNAL OF EXPERIMENTAL BIOLOGY (Botany)","volume":"200 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78492301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.5455/EGYJEBB.20181108065044
H. Mahmoud
Abstract Nanotechnology is an emerging multidisciplinary field with a wide range of applications in agriculture, cancer therapy, targeted drug delivery and cosmetic industry. Nevertheless, unspecified release of nanoparticles (NPs) into the ecosystem has raised global concern about their potential toxic effects. In the present study, the effect of different concentrations of ZnO NPs were evaluated on molecular DNA level, on mitotic and meiotic division of Vicia faba plant. The data obtained using ISSR assay showed change in bands number in all tested samples. The highest polymorphic bands recorded are 36 and 34 bands at samples treated with 50.00 and 37.50 μg/mL of ZnO NPs respectively, as compared with untreated plants. In addition to appearance and disappearance of bands in ISSR profiles, a decrease in genetic template stability (GTS) values was recorded with increasing the concentration. The GTS value recorded 58.62% with the highest concentration (50.00 μg/mL); while recorded 67.82% in samples treated with the lowest concentration (6.25 μg/mL) of ZnO NPs. High GTS value indicates that the genome is less prone to alterations in its DNA, whereas low GTS value indicates greater chances of DNA alteration. On the other hand, the cytotoxic effect of ZnO NPs as indicated by inhibiting mitotic and meiotic division and production of chromosomal aberrations such as chromosome breaks was confirmed by their effect on DNA profiles in Vicia faba plant. This study revealed that higher concentrations of Zinc oxide nanoparticles (ZnO NPs) produce genotoxic effects which indirectly can cause health risks to the human populations. Further studies focused over elucidating the fate and behaviour of ZnO-NPs in complex environmental matrices are needed to safeguard ecosystem functioning as well as human kind. However, to the best of our understanding no molecular studies of ZnO-NPs on Vicia faba L. has been reported.
{"title":"Molecular and cytogenetic assessment of zinc nanoparticles on Vicia faba plant cells.","authors":"H. Mahmoud","doi":"10.5455/EGYJEBB.20181108065044","DOIUrl":"https://doi.org/10.5455/EGYJEBB.20181108065044","url":null,"abstract":"Abstract Nanotechnology is an emerging multidisciplinary field with a wide range of applications in agriculture, cancer therapy, targeted drug delivery and cosmetic industry. Nevertheless, unspecified release of nanoparticles (NPs) into the ecosystem has raised global concern about their potential toxic effects. In the present study, the effect of different concentrations of ZnO NPs were evaluated on molecular DNA level, on mitotic and meiotic division of Vicia faba plant. The data obtained using ISSR assay showed change in bands number in all tested samples. The highest polymorphic bands recorded are 36 and 34 bands at samples treated with 50.00 and 37.50 μg/mL of ZnO NPs respectively, as compared with untreated plants. In addition to appearance and disappearance of bands in ISSR profiles, a decrease in genetic template stability (GTS) values was recorded with increasing the concentration. The GTS value recorded 58.62% with the highest concentration (50.00 μg/mL); while recorded 67.82% in samples treated with the lowest concentration (6.25 μg/mL) of ZnO NPs. High GTS value indicates that the genome is less prone to alterations in its DNA, whereas low GTS value indicates greater chances of DNA alteration. On the other hand, the cytotoxic effect of ZnO NPs as indicated by inhibiting mitotic and meiotic division and production of chromosomal aberrations such as chromosome breaks was confirmed by their effect on DNA profiles in Vicia faba plant. This study revealed that higher concentrations of Zinc oxide nanoparticles (ZnO NPs) produce genotoxic effects which indirectly can cause health risks to the human populations. Further studies focused over elucidating the fate and behaviour of ZnO-NPs in complex environmental matrices are needed to safeguard ecosystem functioning as well as human kind. However, to the best of our understanding no molecular studies of ZnO-NPs on Vicia faba L. has been reported.","PeriodicalId":22404,"journal":{"name":"THE EGYPTIAN JOURNAL OF EXPERIMENTAL BIOLOGY (Botany)","volume":"127 8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79588819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.5455/EGYJEBB.20190505044917
Shimaa M. El Shafay, A. Shady, L. Mohamed, Shimaa Hosny, W. Labib
The present study investigated the potential allelopathic effects of the living green marine macroalga Ulva fasciata growth of several marine microalgae. Skeletonema costatum (Bacillariophyta, centric diatom), Nitzschia longissima (pennate diatom), Scrippsiella trochoidea & Alexandrium minutum (Dinophyta), and Heterosigma akashiwo (Raphidophyta) all being previously identified as bloom forming species in Alexandria coastal water, Egypt. The results showed reduction of microalgal growth as a result of treatment with fresh thalli compared to the respective control treatments. In addition, macroalgal growth increased with the increasing of treatment time in a dependent way. The degree of dominance and concentrations of fatty acids oscillated in all treatments. The fatty acids composition showed 11 pattern of Fatty acids (9 saturated& 2 unsaturated). The major saturated acids arranged by decreasing order are C15.0, C14.0, C16.0 and C13.0.
{"title":"Allelopathic effect of the green macroalgae Ulva fasciata (Delile) on potentially harmful algal bloom forming species","authors":"Shimaa M. El Shafay, A. Shady, L. Mohamed, Shimaa Hosny, W. Labib","doi":"10.5455/EGYJEBB.20190505044917","DOIUrl":"https://doi.org/10.5455/EGYJEBB.20190505044917","url":null,"abstract":"The present study investigated the potential allelopathic effects of the living green marine macroalga Ulva fasciata growth of several marine microalgae. Skeletonema costatum (Bacillariophyta, centric diatom), Nitzschia longissima (pennate diatom), Scrippsiella trochoidea & Alexandrium minutum (Dinophyta), and Heterosigma akashiwo (Raphidophyta) all being previously identified as bloom forming species in Alexandria coastal water, Egypt. The results showed reduction of microalgal growth as a result of treatment with fresh thalli compared to the respective control treatments. In addition, macroalgal growth increased with the increasing of treatment time in a dependent way. The degree of dominance and concentrations of fatty acids oscillated in all treatments. The fatty acids composition showed 11 pattern of Fatty acids (9 saturated& 2 unsaturated). The major saturated acids arranged by decreasing order are C15.0, C14.0, C16.0 and C13.0.","PeriodicalId":22404,"journal":{"name":"THE EGYPTIAN JOURNAL OF EXPERIMENTAL BIOLOGY (Botany)","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86977658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.5455/EGYJEBB.20190507020508
Hanan Ahmed Hashem, Abdel Rahman, H. Kassem, N. F. Aziz
The aim of the present work was to evaluate the allelopathic effect of different concentrations (25, 50 and 100 µg/ml) of root exudates and aqueous leaf extracts of three desert plants (Artemisia judaica, Asphodelus microcarpus and Solanum nigrum) on two weed plants (Portulaca oleracea and Phalaris minor). In laboratory experiment, the three studied plants possessed herbicidal effects that significantly inhibited germination, seedling growth and chlorophyll content of P. oleracea and P. minor; the inhibitory effect was proportional to the concentrations applied. Artemisia judaica and A. microcarpus were the most effective root exudates against P. oleracea while A. microcarpus was the most effective against P. minor compared to the other examined root exudates. Meanwhile, A. judaica was proved to be the most effective leaf extract against P. oleracea and P. minor followed by A. microcarpus and then S. nigrum. A number of phenols and flavonoids with known allelopathic potential was identified in the leaf extracts of the three studied plants and could explain their inhibitory effect on P. minor and P. oleracea plants. Generally, the aqueous leaf extracts showed greater allelopathic effects than the root exudates. However, both root exudates and aqueous leaf extracts of the three tested plants are attractive to be utilized in bio- herbicidal development program towards active weed management.
{"title":"Herbicidal potential of desert plants Artemisia judaica L., Asphodelus microcarpus Salzm. and Viv. and Solanum nigrum L. against Portulaca oleracea and Phalaris minor","authors":"Hanan Ahmed Hashem, Abdel Rahman, H. Kassem, N. F. Aziz","doi":"10.5455/EGYJEBB.20190507020508","DOIUrl":"https://doi.org/10.5455/EGYJEBB.20190507020508","url":null,"abstract":"The aim of the present work was to evaluate the allelopathic effect of different concentrations (25, 50 and 100 µg/ml) of root exudates and aqueous leaf extracts of three desert plants (Artemisia judaica, Asphodelus microcarpus and Solanum nigrum) on two weed plants (Portulaca oleracea and Phalaris minor). In laboratory experiment, the three studied plants possessed herbicidal effects that significantly inhibited germination, seedling growth and chlorophyll content of P. oleracea and P. minor; the inhibitory effect was proportional to the concentrations applied. Artemisia judaica and A. microcarpus were the most effective root exudates against P. oleracea while A. microcarpus was the most effective against P. minor compared to the other examined root exudates. Meanwhile, A. judaica was proved to be the most effective leaf extract against P. oleracea and P. minor followed by A. microcarpus and then S. nigrum. A number of phenols and flavonoids with known allelopathic potential was identified in the leaf extracts of the three studied plants and could explain their inhibitory effect on P. minor and P. oleracea plants. Generally, the aqueous leaf extracts showed greater allelopathic effects than the root exudates. However, both root exudates and aqueous leaf extracts of the three tested plants are attractive to be utilized in bio- herbicidal development program towards active weed management.","PeriodicalId":22404,"journal":{"name":"THE EGYPTIAN JOURNAL OF EXPERIMENTAL BIOLOGY (Botany)","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91263601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.5455/egyjebb.20191208055126
E. A. M. Ali
Nanotechnology is the most advanced research area in the present era. Copper nanoparticles displayed a significant role in many biological fields. The aim of the present study is to synthesize, characterize and study the biological activities of copper nanoparticles. Copper nanoparticles were produced from copper nitrate by chemical reduction method using isopropyl alcohol and cetyl trimethylammonium bromide (CTAB). Synthesized particles were characterized by fourier transform infrared (FTIR) spectrophotometer and transmission electron microscopic (TEM) analysis. Spherical particles were produced with size range 5-13 nm. Antimicrobial activities of both copper nanoparticles and copper nitrate precursor were tested against Aspergillus flavus, Aspergillus fumigatus, Aspergillus niger, Candida albicans, Penicillium expansum, Staphylococcus aureus, Streptococcus faecalis, Streptococcus mutans, Escherichia coli, Neisseria gonorrhoeae and Pseudomonas aeruginosa. Both copper nanoparticles and copper nitrate precursor showed higher antibacterial activities than antifungal activities. Copper nanoparticles and copper nitrate precursor showed antioxidant activity relatively close to each other, with efficient antioxidant activity reached to 95.42% at 500 µg/ml of copper nanoparticles. Copper nanoparticles revealed higher significant cytotoxic effects than copper nitrate precursor. Production of copper nanoparticles by using chemical reduction method was simple, unexpensive and fast. Copper nanoparticles exhibited significant biological activities.
{"title":"Synthesis, characterization and biological activities of copper nanoparticles","authors":"E. A. M. Ali","doi":"10.5455/egyjebb.20191208055126","DOIUrl":"https://doi.org/10.5455/egyjebb.20191208055126","url":null,"abstract":"Nanotechnology is the most advanced research area in the present era. Copper nanoparticles displayed a significant role in many biological fields. The aim of the present study is to synthesize, characterize and study the biological activities of copper nanoparticles. Copper nanoparticles were produced from copper nitrate by chemical reduction method using isopropyl alcohol and cetyl trimethylammonium bromide (CTAB). Synthesized particles were characterized by fourier transform infrared (FTIR) spectrophotometer and transmission electron microscopic (TEM) analysis. Spherical particles were produced with size range 5-13 nm. Antimicrobial activities of both copper nanoparticles and copper nitrate precursor were tested against Aspergillus flavus, Aspergillus fumigatus, Aspergillus niger, Candida albicans, Penicillium expansum, Staphylococcus aureus, Streptococcus faecalis, Streptococcus mutans, Escherichia coli, Neisseria gonorrhoeae and Pseudomonas aeruginosa. Both copper nanoparticles and copper nitrate precursor showed higher antibacterial activities than antifungal activities. Copper nanoparticles and copper nitrate precursor showed antioxidant activity relatively close to each other, with efficient antioxidant activity reached to 95.42% at 500 µg/ml of copper nanoparticles. Copper nanoparticles revealed higher significant cytotoxic effects than copper nitrate precursor. Production of copper nanoparticles by using chemical reduction method was simple, unexpensive and fast. Copper nanoparticles exhibited significant biological activities.","PeriodicalId":22404,"journal":{"name":"THE EGYPTIAN JOURNAL OF EXPERIMENTAL BIOLOGY (Botany)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79600845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.5455/egyjebb.20190620115158
Elhamy M. El-Assiuty, E. Taha, Z. Fahmy, G. M. Fahmy
The oospores of Perosnospora variabilis Gaum, the causal agent of downy mildew of quinoa (Chenopodium quinoa L.), were detected histologically in the perianth of quinoa seed, the pericarp, testa, perisperm, and the cotyledons of the embryo. The histological detections of oospores were confirmed by the polymerase chain reaction (PCR) using the DNA extracted from the perianth and all of the seed parts. The percentage occurrence of oospores in examined seed samples was high in the perianth (90%) followed by the seed coat (87%) whereas, the lowest percentages were found in the embryo (3%) and the perisperm (2%).
{"title":"Histological and Molecular Detections of Peronospora variabilis Gäum Oospores in Seeds of Quinoa (Chenopodium quinoa L.)","authors":"Elhamy M. El-Assiuty, E. Taha, Z. Fahmy, G. M. Fahmy","doi":"10.5455/egyjebb.20190620115158","DOIUrl":"https://doi.org/10.5455/egyjebb.20190620115158","url":null,"abstract":"The oospores of Perosnospora variabilis Gaum, the causal agent of downy mildew of quinoa (Chenopodium quinoa L.), were detected histologically in the perianth of quinoa seed, the pericarp, testa, perisperm, and the cotyledons of the embryo. The histological detections of oospores were confirmed by the polymerase chain reaction (PCR) using the DNA extracted from the perianth and all of the seed parts. The percentage occurrence of oospores in examined seed samples was high in the perianth (90%) followed by the seed coat (87%) whereas, the lowest percentages were found in the embryo (3%) and the perisperm (2%).","PeriodicalId":22404,"journal":{"name":"THE EGYPTIAN JOURNAL OF EXPERIMENTAL BIOLOGY (Botany)","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83527122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.5455/egyjebb.20190225102702
M. Khazan, Reham M.Al-Zlabani
Heavy metals are the most serious environmental pollutants in the current time as a result of industrial development in several countries. Their pollution is poisoning threat for human, animal and plant life because toxic metals cause several serious ailments. Many techniques have been emerged for the elimination of heavy metal contamination for the environment. Either physical or chemical ones, have limitations such as high cost, long time, logistical problems and mechanical complexity. Phytoremediation alternative solution can be used for heavy metal remediation process because of its advantages as a cost-effective, efficient, and eco-friendly technology based on the use of metal-accumulating plants. Many plant species have a high potential as heavy metals bioaccumulators and can be used for their phytoremediation process. This review focus on the common phytoremediation mechanisms and the role of four street-tree species (Moringa oleifera, Azadirachta indica, Lantana camara and Conocarpus erectus) commonly cultivated throughout the Kingdom of Saudi Arabia (KSA) in phytoremediating various pollutants. Trees description, habitat of growth and their potential to phytoremediate different heavy metals would be discussed.
{"title":"Toxic materials phytoremediation potential of four common trees in Saudi Arabia","authors":"M. Khazan, Reham M.Al-Zlabani","doi":"10.5455/egyjebb.20190225102702","DOIUrl":"https://doi.org/10.5455/egyjebb.20190225102702","url":null,"abstract":"Heavy metals are the most serious environmental pollutants in the current time as a result of industrial development in several countries. Their pollution is poisoning threat for human, animal and plant life because toxic metals cause several serious ailments. Many techniques have been emerged for the elimination of heavy metal contamination for the environment. Either physical or chemical ones, have limitations such as high cost, long time, logistical problems and mechanical complexity. Phytoremediation alternative solution can be used for heavy metal remediation process because of its advantages as a cost-effective, efficient, and eco-friendly technology based on the use of metal-accumulating plants. Many plant species have a high potential as heavy metals bioaccumulators and can be used for their phytoremediation process. This review focus on the common phytoremediation mechanisms and the role of four street-tree species (Moringa oleifera, Azadirachta indica, Lantana camara and Conocarpus erectus) commonly cultivated throughout the Kingdom of Saudi Arabia (KSA) in phytoremediating various pollutants. Trees description, habitat of growth and their potential to phytoremediate different heavy metals would be discussed.","PeriodicalId":22404,"journal":{"name":"THE EGYPTIAN JOURNAL OF EXPERIMENTAL BIOLOGY (Botany)","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91481800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.5455/EGYJEBB.20190618082647
G. M. Fahmy, S. A. Moussa, H. Farrag, R. A. A. Rehem
Trianthema portulacastrum L. is one of the problematic terrestrial summer weeds. It competes with various agricultural crops. The present investigation aimed to investigate the traits, which enable the seeds to disperse, germinate, grow and adapt to habitat conditions. The plant produces large number (1931 seeds) of small seeds (1.08 mg seed-1). Scanning electron microscopy of the seed testa revealed that the anticlinal walls of the epidermal cells were penta-hexagonal, and highly raised, while the periclinal walls were sunken. This pattern leads to the porous appearance of the testa. The effects of temperature on seed germination were monitored under continuous light and continuous dark conditions. Under light conditions, the percentages of seed germination were significantly higher than at the dark conditions. Higher temperatures of 35, 40 and 45 °C promoted the seed germination. In the temperature range from 30 to 45 °C, the plumule lengths of the seedlings germinated in the light conditions were smaller than those grown under dark conditions. Under all conditions, the length of radicle was higher than the plumule. The traits of seeds, germination, and seedlings grown under experimental conditions are discussed in terms of the seed dispersal and potential adaptations of seedlings to the environment.
{"title":"Seed and germination traits of the summer weed \u0000Trianthema portulacastrum L.","authors":"G. M. Fahmy, S. A. Moussa, H. Farrag, R. A. A. Rehem","doi":"10.5455/EGYJEBB.20190618082647","DOIUrl":"https://doi.org/10.5455/EGYJEBB.20190618082647","url":null,"abstract":"Trianthema portulacastrum L. is one of the problematic terrestrial summer weeds. It competes with various agricultural crops. The present investigation aimed to investigate the traits, which enable the seeds to disperse, germinate, grow and adapt to habitat conditions. The plant produces large number (1931 seeds) of small seeds (1.08 mg seed-1). Scanning electron microscopy of the seed testa revealed that the anticlinal walls of the epidermal cells were penta-hexagonal, and highly raised, while the periclinal walls were sunken. This pattern leads to the porous appearance of the testa. The effects of temperature on seed germination were monitored under continuous light and continuous dark conditions. Under light conditions, the percentages of seed germination were significantly higher than at the dark conditions. Higher temperatures of 35, 40 and 45 °C promoted the seed germination. In the temperature range from 30 to 45 °C, the plumule lengths of the seedlings germinated in the light conditions were smaller than those grown under dark conditions. Under all conditions, the length of radicle was higher than the plumule. The traits of seeds, germination, and seedlings grown under experimental conditions are discussed in terms of the seed dispersal and potential adaptations of seedlings to the environment.","PeriodicalId":22404,"journal":{"name":"THE EGYPTIAN JOURNAL OF EXPERIMENTAL BIOLOGY (Botany)","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85656269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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