Pub Date : 2024-06-12DOI: 10.37427/botcro-2025-006
L. Vojta, H. Fulgosi, Ana Tomašić Paić, Ena Dumančić
The thylakoid rhodanese-like protein (TROL) is located at the end of the photosynthetic electron transport chain, at the vicinity of photosystem I, where it dynamically interacts with the ferredoxin:NADP+ oxidoreductase (FNR) and is postulated to facilitate the transfer of electrons from reduced ferredoxin (Fd) to NADP+. TROL is one of the few so far known dually localized chloroplast proteins. Besides being localized in the thylakoid membranes as the 66 kDa mature form, it has also been found in the inner envelope membrane of chloroplasts as the 70 kDa precursor. In thylakoids, the interaction between TROL and FNR acts like a switch, prioritizing the photosynthetic electron destination sinks according to the organellar needs. The role of TROL in the chloroplast inner envelope membrane is, however, presently unknown. By engineering the presequence protease processing site, a single amino acid exchange of Ala67 to Ile67 has been introduced to TROL, leading to inhibited cleavage of the presequence and resulting in protein incorporation at the inner envelope membrane. In this work, we engineered the Arabidopsis mutant plants that contain TROL almost exclusively in the inner envelope membrane (TROL-IE). To facilitate studying the role of this protein in this chloroplast compartment, we also produced the antiserum specific for the IE form of the TROL.
{"title":"Construction of the Arabidopsis isogenic lines containing dually localized protein TROL only in the inner chloroplast envelope membrane","authors":"L. Vojta, H. Fulgosi, Ana Tomašić Paić, Ena Dumančić","doi":"10.37427/botcro-2025-006","DOIUrl":"https://doi.org/10.37427/botcro-2025-006","url":null,"abstract":"The thylakoid rhodanese-like protein (TROL) is located at the end of the photosynthetic electron transport chain, at the vicinity of photosystem I, where it dynamically interacts with the ferredoxin:NADP+ oxidoreductase (FNR) and is postulated to facilitate the transfer of electrons from reduced ferredoxin (Fd) to NADP+. TROL is one of the few so far known dually localized chloroplast proteins. Besides being localized in the thylakoid membranes as the 66 kDa mature form, it has also been found in the inner envelope membrane of chloroplasts as the 70 kDa precursor. In thylakoids, the interaction between TROL and FNR acts like a switch, prioritizing the photosynthetic electron destination sinks according to the organellar needs. The role of TROL in the chloroplast inner envelope membrane is, however, presently unknown. By engineering the presequence protease processing site, a single amino acid exchange of Ala67 to Ile67 has been introduced to TROL, leading to inhibited cleavage of the presequence and resulting in protein incorporation at the inner envelope membrane. In this work, we engineered the Arabidopsis mutant plants that contain TROL almost exclusively in the inner envelope membrane (TROL-IE). To facilitate studying the role of this protein in this chloroplast compartment, we also produced the antiserum specific for the IE form of the TROL.","PeriodicalId":6967,"journal":{"name":"Acta Botanica Croatica","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141350472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-12DOI: 10.37427/botcro-2025-003
Çiler Kartal
In this study, the embryology of Centaurea kilaea Boiss., a species endemic to Türkiye, was examined using light microscopy. The anthers of C. kilaea are tetrasporangiate; the anther wall development is dicotyledonous; and the tapetum is amoeboid. The meiotic division of the microspore mother cells is regular, and when the pollen grains are thrown from the anthers, they are three-celled. The ovary of C. kilaea is inferior, bicarpellary, syncarpous, and unilocular, which is characteristic of the Asteraceae family. It carries only a single ovule with basal placentation. The ovule is anatropous, unitegmic, and tenuinucellate. The megaspore mother cell undergoes meiotic division, giving rise to a linear tetrad of megaspores. The chalazal megaspore remains functional, and the other three megaspores degenerate rapidly. The functional megaspore undergoes three mitotic divisions in succession. As a result, a Polygonum-type embryo sac, with eight nuclei and seven cells, is formed. The antipodal cells persist until the first divisions of the zygote. In the mature embryo sac stage, the integument consists of the endothelium, peri-endothelial region, parenchymatous cells, and outer epidermis, from the inside out. Endosperm development is initially free nuclear, becoming cellular in the globular embryo stage. Embryo development is of the asterad type. The mature seed does not contain endosperm, but the endothelium persists.
{"title":"Reproductive biology of Centaurea kilaea (Asteraceae, Cardueae) – an endemic species from Türkiye","authors":"Çiler Kartal","doi":"10.37427/botcro-2025-003","DOIUrl":"https://doi.org/10.37427/botcro-2025-003","url":null,"abstract":"In this study, the embryology of Centaurea kilaea Boiss., a species endemic to Türkiye, was examined using light microscopy. The anthers of C. kilaea are tetrasporangiate; the anther wall development is dicotyledonous; and the tapetum is amoeboid. The meiotic division of the microspore mother cells is regular, and when the pollen grains are thrown from the anthers, they are three-celled. The ovary of C. kilaea is inferior, bicarpellary, syncarpous, and unilocular, which is characteristic of the Asteraceae family. It carries only a single ovule with basal placentation. The ovule is anatropous, unitegmic, and tenuinucellate. The megaspore mother cell undergoes meiotic division, giving rise to a linear tetrad of megaspores. The chalazal megaspore remains functional, and the other three megaspores degenerate rapidly. The functional megaspore undergoes three mitotic divisions in succession. As a result, a Polygonum-type embryo sac, with eight nuclei and seven cells, is formed. The antipodal cells persist until the first divisions of the zygote. In the mature embryo sac stage, the integument consists of the endothelium, peri-endothelial region, parenchymatous cells, and outer epidermis, from the inside out. Endosperm development is initially free nuclear, becoming cellular in the globular embryo stage. Embryo development is of the asterad type. The mature seed does not contain endosperm, but the endothelium persists.","PeriodicalId":6967,"journal":{"name":"Acta Botanica Croatica","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141351070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-12DOI: 10.37427/botcro-2025-007
Gregorio Aragón, Valerie Negrón, Gil Fernando Giménez
We report the first record of Pisutiella phaeothamnos (Kalb & Poelt) S.Y. Kondr., Lőkös & Farkas in the western Mediterranean (Central Spain). The nearest previous records were from the Canary Islands and Greece. The species was discovered among mosses on volcanic rocks in the Spanish Central Volcanic Region. This finding represents a significant expansion of its distribution range.
{"title":"First record of Pisutiella phaeothamnos in the western Mediterranean","authors":"Gregorio Aragón, Valerie Negrón, Gil Fernando Giménez","doi":"10.37427/botcro-2025-007","DOIUrl":"https://doi.org/10.37427/botcro-2025-007","url":null,"abstract":"We report the first record of Pisutiella phaeothamnos (Kalb & Poelt) S.Y. Kondr., Lőkös & Farkas in the western Mediterranean (Central Spain). The nearest previous records were from the Canary Islands and Greece. The species was discovered among mosses on volcanic rocks in the Spanish Central Volcanic Region. This finding represents a significant expansion of its distribution range.","PeriodicalId":6967,"journal":{"name":"Acta Botanica Croatica","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141351005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-12DOI: 10.37427/botcro-2024-018
Sabrina Gueridi, L. Boucelha, O. Abrous-Belbachir, R. Djebbar
Various approaches are used to improve crop production. Seed priming is one of the simplest and least expensive methods currently used to ensure rapid and uniform yields. Our study highlights the role of priming and imbibition in improving seed germination. The objective of this study was to investigate the effect of seed imbibition and hormopriming with 0.1 mM gibberellic acid (GA3) on germination performance and biochemical changes in fenugreek (Trigonella foenum-graecum L.) radicles. The results showed that hydropriming and imbibition with GA3 significantly improved germination performance and radicle growth. Concurrently, treatments induced stimulation of the antioxidant activities of superoxide dismutase, ascorbic peroxidase, catalase and guaiacol peroxidase, and decreased lipid peroxidation, stimulated an increase in total non-enzymatic antioxidant capacity and reduced glutathione content. Accumulation of hydrogen peroxide and cytochemical analysis of reactive oxygen species (ROS) in situ confirmed the role of imbibition in stimulating ROS. Interestingly the effects of imbibition with gibberellic acid were more effective then hormopriming, probably due to the partial degradation of GA3 during dehydration process.
{"title":"Effects of\u0000hormopriming and pretreatment with gibberellic acid on fenugreek (Trigonella foenum graecum L.) seed\u0000germination","authors":"Sabrina Gueridi, L. Boucelha, O. Abrous-Belbachir, R. Djebbar","doi":"10.37427/botcro-2024-018","DOIUrl":"https://doi.org/10.37427/botcro-2024-018","url":null,"abstract":"Various approaches are used to improve crop production. Seed priming is one of the simplest and least expensive methods currently used to ensure rapid and uniform yields. Our study highlights the role of priming and imbibition in improving seed germination. The objective of this study was to investigate the effect of seed imbibition and hormopriming with 0.1 mM gibberellic acid (GA3) on germination performance and biochemical changes in fenugreek (Trigonella foenum-graecum L.) radicles. The results showed that hydropriming and imbibition with GA3 significantly improved germination performance and radicle growth. Concurrently, treatments induced stimulation of the antioxidant activities of superoxide dismutase, ascorbic peroxidase, catalase and guaiacol peroxidase, and decreased lipid peroxidation, stimulated an increase in total non-enzymatic antioxidant capacity and reduced glutathione content. Accumulation of hydrogen peroxide and cytochemical analysis of reactive oxygen species (ROS) in situ confirmed the role of imbibition in stimulating ROS. Interestingly the effects of imbibition with gibberellic acid were more effective then hormopriming, probably due to the partial degradation of GA3 during dehydration process.","PeriodicalId":6967,"journal":{"name":"Acta Botanica Croatica","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140249528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-11DOI: 10.37427/botcro-2024-021
Ramazan Karamzehi, A. Einali
Trehalose (Tre) is an osmoprotectant known to be an important player in regulating response to salinity. In this research, the effect of Tre foliar application on the growth rate, the content of photosynthetic pigments, accumulation of metabolites, and activity of antioxidant enzymes of basil seedlings under salt stress has been investigated. Basil seedlings were factorially treated twice a week with levels of 0, 25, 50, 100, and 150 mM NaCl and weekly with concentrations of 0 and 5 mM Tre for 4 weeks. Growth characteristics, the content of photosynthetic pigments including chlorophyll and carotenoid, and starch content decreased in response to salt stress, while the activity of antioxidant enzymes and the accumulation of metabolites including soluble sugars, proteins, amino acids, and proline increased. Tre treatment caused severe inhibition of plant growth, further reduction of photosynthetic pigments, and amount of soluble proteins during salinity stress. Also, starch, total protein, amino acids, and proline were hyperaccumulated in response to Tre. These results indicate that Tre not only does not reduce the detrimental effects of salinity in basil seedlings but also inhibits plant growth possibly by diverting carbon to other metabolic pathways.
据了解，海藻糖（Trehalose，Tre）是一种渗透保护剂，在调节盐度反应方面起着重要作用。本研究探讨了叶面喷施 Tre 对盐胁迫下罗勒幼苗的生长速率、光合色素含量、代谢产物积累和抗氧化酶活性的影响。罗勒幼苗每周接受两次浓度分别为 0、25、50、100 和 150 mM NaCl 的因素处理，每周接受一次浓度分别为 0 和 5 mM Tre 的因素处理，持续 4 周。生长特性、光合色素（包括叶绿素和类胡萝卜素）含量和淀粉含量在盐胁迫下均有所下降，而抗氧化酶的活性和代谢产物（包括可溶性糖、蛋白质、氨基酸和脯氨酸）的积累则有所增加。在盐胁迫期间，Tre 处理严重抑制了植物的生长，进一步降低了光合色素和可溶性蛋白质的含量。此外，淀粉、总蛋白、氨基酸和脯氨酸也在 Tre 的作用下过度积累。这些结果表明，Tre 不仅不能减轻盐度对罗勒幼苗的不利影响，还可能通过将碳转移到其他代谢途径而抑制植物生长。
{"title":"Trehalose-induced metabolic responses in\u0000basil (Ocimum basilicum) seedlings under salt treatment","authors":"Ramazan Karamzehi, A. Einali","doi":"10.37427/botcro-2024-021","DOIUrl":"https://doi.org/10.37427/botcro-2024-021","url":null,"abstract":"Trehalose (Tre) is an osmoprotectant known to be an important player in regulating response to salinity. In this research, the effect of Tre foliar application on the growth rate, the content of photosynthetic pigments, accumulation of metabolites, and activity of antioxidant enzymes of basil seedlings under salt stress has been investigated. Basil seedlings were factorially treated twice a week with levels of 0, 25, 50, 100, and 150 mM NaCl and weekly with concentrations of 0 and 5 mM Tre for 4 weeks. Growth characteristics, the content of photosynthetic pigments including chlorophyll and carotenoid, and starch content decreased in response to salt stress, while the activity of antioxidant enzymes and the accumulation of metabolites including soluble sugars, proteins, amino acids, and proline increased. Tre treatment caused severe inhibition of plant growth, further reduction of photosynthetic pigments, and amount of soluble proteins during salinity stress. Also, starch, total protein, amino acids, and proline were hyperaccumulated in response to Tre. These results indicate that Tre not only does not reduce the detrimental effects of salinity in basil seedlings but also inhibits plant growth possibly by diverting carbon to other metabolic pathways.","PeriodicalId":6967,"journal":{"name":"Acta Botanica Croatica","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140251894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-04DOI: 10.37427/botcro-2024-019
D. Iamonico, Gianluca Nicolella
Melaleuca williamsii subsp. synoriensis (Myrtaceae) has been found in Rome (central Italy) along the banks of the river Tevere, representing the first discovery outside its native range (E-Australia). Description, distribution in Italy, phenology, and original photographs are provided.
{"title":"First record of the woody Melaleuca\u0000williamsii s.l. (Myrtaceae) out of its native range","authors":"D. Iamonico, Gianluca Nicolella","doi":"10.37427/botcro-2024-019","DOIUrl":"https://doi.org/10.37427/botcro-2024-019","url":null,"abstract":"Melaleuca williamsii subsp. synoriensis (Myrtaceae) has been found in Rome (central Italy) along the banks of the river Tevere, representing the first discovery outside its native range (E-Australia). Description, distribution in Italy, phenology, and original photographs are provided.","PeriodicalId":6967,"journal":{"name":"Acta Botanica Croatica","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140080041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-04DOI: 10.37427/botcro-2024-020
Massimo Terzi, Nenad Jasprica, A. Čarni, V. Matevski, Erwin Bergmeier, J. Theurillat
The Romuleion, the only alliance of the order Poetalia bulbosae (class Poetea bulbosae) found on the Balkan Peninsula, represents Mediterranean perennial and ephemeral pastures. It has been found in several Balkan countries, from Greece to the Republic of North Macedonia, Montenegro, Croatia and Bulgaria. However, a revision of its nomenclature according to the fourth edition of the International Code of Phytosociological Nomenclature shows that the name of the alliance was not validly published. In this paper we therefore describe the new alliance Romuleion graecae, together with the new association Plantagini lagopodis-Poetum bulbosae.
{"title":"Nomenclature of the Balkan alliance Romuleion graecae (Poetea bulbosae)","authors":"Massimo Terzi, Nenad Jasprica, A. Čarni, V. Matevski, Erwin Bergmeier, J. Theurillat","doi":"10.37427/botcro-2024-020","DOIUrl":"https://doi.org/10.37427/botcro-2024-020","url":null,"abstract":"The Romuleion, the only alliance of the order Poetalia bulbosae (class Poetea bulbosae) found on the Balkan Peninsula, represents Mediterranean perennial and ephemeral pastures. It has been found in several Balkan countries, from Greece to the Republic of North Macedonia, Montenegro, Croatia and Bulgaria. However, a revision of its nomenclature according to the fourth edition of the International Code of Phytosociological Nomenclature shows that the name of the alliance was not validly published. In this paper we therefore describe the new alliance Romuleion graecae, together with the new association Plantagini lagopodis-Poetum bulbosae.","PeriodicalId":6967,"journal":{"name":"Acta Botanica Croatica","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140080654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-01DOI: 10.37427/botcro-2024-014
Massimo Terzi, N. Jasprica
The changes in the grassland vegetation that have occurred over the last almost 100 years on the northeastern Adriatic island of Plavnik (Croatia) were studied. For this purpose, 29 phytosociological relevés of standard plot size were collected using the Braun-Blanquet phytosociological approach and compared with those of 100 years ago. With the aim of defining the differences among the communities and identifying the main environmental gradients, cluster analysis (Ward's method on a Chord distance matrix) and non-metric multidimensional scaling ordination were applied. Taxa score-weighted means of the Ellenberg-type indicator values of main environmental variables were used to assess ecological differences among communities, and disturbance-related indicator values were calculated to assess the disturbance regime in shaping plant communities. According to the syntaxonomic framework for the grassland associations, three associations and two subassociations were found. Among them the Festuco valesiacae-Poetum bulbosae (Poetalia bulbosae, Poetea bulbosae), the Helichrysetum italici salvietosum officinalis (Scorzoneretalia villosae, Festuco-Brometea), and the Hedypnoido rhagadioloidis-Asphodeletum ramosi were proposed as new. The Festuco valesiacae-Poetum bulbosae documents for the first time, based on phytosociological data, the occurrence of the Poetea bulbosae in Croatia. Three associations were considered extinct, possibly as a result of changes in grazing pressure and type.
{"title":"Changes in grassland vegetation on the island of Plavnik (Croatia) over 100 years","authors":"Massimo Terzi, N. Jasprica","doi":"10.37427/botcro-2024-014","DOIUrl":"https://doi.org/10.37427/botcro-2024-014","url":null,"abstract":"The changes in the grassland vegetation that have occurred over the last almost 100 years on the northeastern Adriatic island of Plavnik (Croatia) were studied. For this purpose, 29 phytosociological relevés of standard plot size were collected using the Braun-Blanquet phytosociological approach and compared with those of 100 years ago. With the aim of defining the differences among the communities and identifying the main environmental gradients, cluster analysis (Ward's method on a Chord distance matrix) and non-metric multidimensional scaling ordination were applied. Taxa score-weighted means of the Ellenberg-type indicator values of main environmental variables were used to assess ecological differences among communities, and disturbance-related indicator values were calculated to assess the disturbance regime in shaping plant communities. According to the syntaxonomic framework for the grassland associations, three associations and two subassociations were found. Among them the Festuco valesiacae-Poetum bulbosae (Poetalia bulbosae, Poetea bulbosae), the Helichrysetum italici salvietosum officinalis (Scorzoneretalia villosae, Festuco-Brometea), and the Hedypnoido rhagadioloidis-Asphodeletum ramosi were proposed as new. The Festuco valesiacae-Poetum bulbosae documents for the first time, based on phytosociological data, the occurrence of the Poetea bulbosae in Croatia. Three associations were considered extinct, possibly as a result of changes in grazing pressure and type.","PeriodicalId":6967,"journal":{"name":"Acta Botanica Croatica","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140087212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-01DOI: 10.37427/botcro-2024-017
Sevilay Öztürk, Oğuz Kurt
The algal flora and physio-chemical parameters of seven thermal springs in Denizli were studied for the first time. Samples for algal analyses were taken monthly between May 2013 and June 2014, while the physio-chemical parameters were measured seasonally. The mean pH value of the thermal springs was 6.3, and temperatures varied between 34-60 °C. The significant differences (P < 0.001) among the thermal springs were in their temperature and pH, as well as concentration of Cl^- , Fe^2+ , K^+ , Mg^+ , Na^+ , Li^+ , Ca^+ , HCO3^ - , and SO4^2- ions. A total of 43 Cyanobacteria and three Bacillariophyta taxa were determined.The most common taxon was Spirulina subsalsa Oersted ex Gomont, sampled from five sampling sites. According to the principal component analysis (PCA), the most important determining factor for the algae was temperature, followed by concentration of K^+ and Cl^- ions.
{"title":"The taxonomy and distribution of algae in the thermal springs of Türkiye","authors":"Sevilay Öztürk, Oğuz Kurt","doi":"10.37427/botcro-2024-017","DOIUrl":"https://doi.org/10.37427/botcro-2024-017","url":null,"abstract":"The algal flora and physio-chemical parameters of seven thermal springs in Denizli were studied for the first time. Samples for algal analyses were taken monthly between May 2013 and June 2014, while the physio-chemical parameters were measured seasonally. The mean pH value of the thermal springs was 6.3, and temperatures varied between 34-60 °C. The significant differences (P < 0.001) among the thermal springs were in their temperature and pH, as well as concentration of Cl^- , Fe^2+ , K^+ , Mg^+ , Na^+ , Li^+ , Ca^+ , HCO3^ - , and SO4^2- ions. A total of 43 Cyanobacteria and three Bacillariophyta taxa were determined.The most common taxon was Spirulina subsalsa Oersted ex Gomont, sampled from five sampling sites. According to the principal component analysis (PCA), the most important determining factor for the algae was temperature, followed by concentration of K^+ and Cl^- ions.","PeriodicalId":6967,"journal":{"name":"Acta Botanica Croatica","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140089365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-27DOI: 10.37427/botcro-2024-016
Wafaa Taia, Rim S. Hamdy, Amany Mohamed Abd El-Maged
Eleven Terminalia species growing in streets and gardens in Cairo (Egypt) were investigated for their pollen morphology. The study's objectives were to explore the variation among Terminalia species' pollen pheno-characters and to categorize the various species within this genus according to these pollen characteristics. The results showed that there are significant variations in the pollen morphological characteristics in the genus under study, and as a result, these traits can be regarded as eurypalynous. Each of the two main categories of Terminalia species - mono-morphic and di-morphic - includes various pollen morphologies, ranging from spheroidal to prolate with hexa-aperture that may be similar or of two types. For each of the eleven species, an identification key and a clustering phenogram for the fifteen major pollen features have been created. The aperture type, aperture similarity, and exine ornamentation are some of the crucial traits for the differentiation of the species examined while the pollen shape class has a poor diagnostic character. According to the unique characteristics of the pollen morphology of the Terminalia species, three groups and two subgroups were identified.
{"title":"Morpho-palynological assessment of the genus Terminalia L. (Combretaceae) in Egypt","authors":"Wafaa Taia, Rim S. Hamdy, Amany Mohamed Abd El-Maged","doi":"10.37427/botcro-2024-016","DOIUrl":"https://doi.org/10.37427/botcro-2024-016","url":null,"abstract":"Eleven Terminalia species growing in streets and gardens in Cairo (Egypt) were investigated for their pollen morphology. The study's objectives were to explore the variation among Terminalia species' pollen pheno-characters and to categorize the various species within this genus according to these pollen characteristics. The results showed that there are significant variations in the pollen morphological characteristics in the genus under study, and as a result, these traits can be regarded as eurypalynous. Each of the two main categories of Terminalia species - mono-morphic and di-morphic - includes various pollen morphologies, ranging from spheroidal to prolate with hexa-aperture that may be similar or of two types. For each of the eleven species, an identification key and a clustering phenogram for the fifteen major pollen features have been created. The aperture type, aperture similarity, and exine ornamentation are some of the crucial traits for the differentiation of the species examined while the pollen shape class has a poor diagnostic character. According to the unique characteristics of the pollen morphology of the Terminalia species, three groups and two subgroups were identified.","PeriodicalId":6967,"journal":{"name":"Acta Botanica Croatica","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140424548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：