Pub Date : 2021-01-21DOI: 10.1080/00173134.2020.1827026
M. Filipova-Marinova, D. Pavlov, K. Slavova
The Black Sea is an intercontinental enclosed-type marine basin. The Black Sea continental slope is characterised by deeply indented relief. The AKAD09-10 core studied consists of continuous deposits and was taken from the interfluvial zone located between submarine valleys. The natural vegetation of the western Black Sea coast is dominated by temperate forest communities of Quercus cerris L. and Q. frainetto Ten., together with Q. polycarpa Schur. and Carpinus betulus L. (Bondev 1991; FilipovaMarinova et al. 2017). Riverine flooded (riparian) forests are mainly composed of Fraxinus oxycarpa Willd., Ulmus minor Mill., Carpinus betulus, Q. pedunculiflora C.-Koch, Alnus glutinosa (L.) Gaerth., and Hedera helix L. Relic South-Euxinian forests of Fagus orientalis Lipsky, with the undergrowth of Rhododendron ponticum L. are spread in humid ravines of the Strandzha Mountains. Steppe vegetation of the Dobrudzha region is dominated by Festuca pseudovina Hack. ex Wiseb., Chrysopogon gryllus (L.) Trin., Botriochloa ischaemum (L.) Keng, and Poa bulbosa L. Elements of the Mediterranean vegetation are Paliurus spina-christi Mill., Carpinus orientalis Mill., Phillyrea latifolia L., and Fraxinus ornus L. The western Black Sea coast is part of the Continental-Mediterranean climatic area and is influenced by the proximity of the sea. Mean annual precipitation in Varna is 480 mm. The mean annual temperature in Varna is 12 °C (Kotsev & Filipova-Marinova 2017).
{"title":"52. Western Black Sea continental slope: continuous Late Pleniglacial to Subatlantic palaeovegetation record","authors":"M. Filipova-Marinova, D. Pavlov, K. Slavova","doi":"10.1080/00173134.2020.1827026","DOIUrl":"https://doi.org/10.1080/00173134.2020.1827026","url":null,"abstract":"The Black Sea is an intercontinental enclosed-type marine basin. The Black Sea continental slope is characterised by deeply indented relief. The AKAD09-10 core studied consists of continuous deposits and was taken from the interfluvial zone located between submarine valleys. The natural vegetation of the western Black Sea coast is dominated by temperate forest communities of Quercus cerris L. and Q. frainetto Ten., together with Q. polycarpa Schur. and Carpinus betulus L. (Bondev 1991; FilipovaMarinova et al. 2017). Riverine flooded (riparian) forests are mainly composed of Fraxinus oxycarpa Willd., Ulmus minor Mill., Carpinus betulus, Q. pedunculiflora C.-Koch, Alnus glutinosa (L.) Gaerth., and Hedera helix L. Relic South-Euxinian forests of Fagus orientalis Lipsky, with the undergrowth of Rhododendron ponticum L. are spread in humid ravines of the Strandzha Mountains. Steppe vegetation of the Dobrudzha region is dominated by Festuca pseudovina Hack. ex Wiseb., Chrysopogon gryllus (L.) Trin., Botriochloa ischaemum (L.) Keng, and Poa bulbosa L. Elements of the Mediterranean vegetation are Paliurus spina-christi Mill., Carpinus orientalis Mill., Phillyrea latifolia L., and Fraxinus ornus L. The western Black Sea coast is part of the Continental-Mediterranean climatic area and is influenced by the proximity of the sea. Mean annual precipitation in Varna is 480 mm. The mean annual temperature in Varna is 12 °C (Kotsev & Filipova-Marinova 2017).","PeriodicalId":50414,"journal":{"name":"Grana","volume":"60 1","pages":"324 - 326"},"PeriodicalIF":0.9,"publicationDate":"2021-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/00173134.2020.1827026","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47835863","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 : 2021-01-14DOI: 10.1080/00173134.2020.1822440
J. Revelles, M. Ghilardi
The study site, l’etang de Piantarella, is located in Bonifacio, on the southern coast of Corsica (France). Three cores were extracted: Piantarella 1 (630 cm, WGS84: 41° 22ʹ 29.34″ N, 9° 13ʹ 12.62″...
{"title":"50. Piantarella (south Corsica, France)","authors":"J. Revelles, M. Ghilardi","doi":"10.1080/00173134.2020.1822440","DOIUrl":"https://doi.org/10.1080/00173134.2020.1822440","url":null,"abstract":"The study site, l’etang de Piantarella, is located in Bonifacio, on the southern coast of Corsica (France). Three cores were extracted: Piantarella 1 (630 cm, WGS84: 41° 22ʹ 29.34″ N, 9° 13ʹ 12.62″...","PeriodicalId":50414,"journal":{"name":"Grana","volume":"60 1","pages":"239 - 242"},"PeriodicalIF":0.9,"publicationDate":"2021-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/00173134.2020.1822440","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44838417","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 : 2021-01-12DOI: 10.1080/00173134.2020.1827025
J. R. Hernández
Abstract The palaeobotanical name Clavatricolpites Hoeken-Klink., representing a Late Cretaceous magnoliopsid pollen genus, is a later homonym. It is preoccupied by the Tricolpate pollen genus name Clavatricolpites R. L. Pierce and is replaced by Nigericolpites nom. nov.
{"title":"Nigericolpites: a replacement name for the illegitimate Maastrichtian magnoliopsid pollen genus Clavatricolpites Hoeken-Klink. (Angiospermae: Magnoliopsida)","authors":"J. R. Hernández","doi":"10.1080/00173134.2020.1827025","DOIUrl":"https://doi.org/10.1080/00173134.2020.1827025","url":null,"abstract":"Abstract The palaeobotanical name Clavatricolpites Hoeken-Klink., representing a Late Cretaceous magnoliopsid pollen genus, is a later homonym. It is preoccupied by the Tricolpate pollen genus name Clavatricolpites R. L. Pierce and is replaced by Nigericolpites nom. nov.","PeriodicalId":50414,"journal":{"name":"Grana","volume":"60 1","pages":"370 - 371"},"PeriodicalIF":0.9,"publicationDate":"2021-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/00173134.2020.1827025","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44397646","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 : 2021-01-12DOI: 10.1080/00173134.2020.1825793
F. G. Vossler
Abstract Pollen and honey resources composing the diet of Tetragonisca angustula fiebrigi Schwarz were assessed using pollen analysis of wild colonies sampled in two kinds of native dry forests of the Chaco region. Different measurements: direct pollen count, relative volume, diversity and evenness indices, value of importance of species (SI), and index of relative importance (IRI) were compared. The IRI identified the most important pollen resources as Prosopis (IRI = 1619), Schinopsis type (IRI = 1578), Trithrinax schizophylla (IRI = 972) and Capparicordis/Sarcotoxicum (IRI = 587), and according to SI the honey resources were Schinopsis type (SI = 117.41), Maytenus type (SI = 101.89), Prosopis (SI = 86.47) and Ziziphus mistol (SI = 50.93). The absolute pollen analysis of honey revealed that all samples were rich in pollen grains. Floral resources were most homogeneously foraged during spring and summer when a high number of flowerings were available and the highest temperatures were recorded. These optimal conditions for bee foraging activity also allowed for the highest diversity indices in these seasons. However, heterogeneous foraging and low diversity were detected during winter and autumn. Most pollen and honey resources belonged to generalised small flowers of diverse plant lineages. The IRI was more comprehensive to identify the most important pollen resources than the commonly used direct pollen count, as it also includes relative volume and frequency of occurrence, and SI was the most thorough for studying the honey resources. This study provides helpful information for sustainable meliponiculture and forest conservation.
{"title":"Assessment of pollen and honey diet of Tetragonisca angustula fiebrigi Schwarz in the Chaco dry forest by using pollen analysis","authors":"F. G. Vossler","doi":"10.1080/00173134.2020.1825793","DOIUrl":"https://doi.org/10.1080/00173134.2020.1825793","url":null,"abstract":"Abstract Pollen and honey resources composing the diet of Tetragonisca angustula fiebrigi Schwarz were assessed using pollen analysis of wild colonies sampled in two kinds of native dry forests of the Chaco region. Different measurements: direct pollen count, relative volume, diversity and evenness indices, value of importance of species (SI), and index of relative importance (IRI) were compared. The IRI identified the most important pollen resources as Prosopis (IRI = 1619), Schinopsis type (IRI = 1578), Trithrinax schizophylla (IRI = 972) and Capparicordis/Sarcotoxicum (IRI = 587), and according to SI the honey resources were Schinopsis type (SI = 117.41), Maytenus type (SI = 101.89), Prosopis (SI = 86.47) and Ziziphus mistol (SI = 50.93). The absolute pollen analysis of honey revealed that all samples were rich in pollen grains. Floral resources were most homogeneously foraged during spring and summer when a high number of flowerings were available and the highest temperatures were recorded. These optimal conditions for bee foraging activity also allowed for the highest diversity indices in these seasons. However, heterogeneous foraging and low diversity were detected during winter and autumn. Most pollen and honey resources belonged to generalised small flowers of diverse plant lineages. The IRI was more comprehensive to identify the most important pollen resources than the commonly used direct pollen count, as it also includes relative volume and frequency of occurrence, and SI was the most thorough for studying the honey resources. This study provides helpful information for sustainable meliponiculture and forest conservation.","PeriodicalId":50414,"journal":{"name":"Grana","volume":"60 1","pages":"287 - 309"},"PeriodicalIF":0.9,"publicationDate":"2021-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/00173134.2020.1825793","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47052249","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 : 2021-01-02DOI: 10.1080/00173134.2020.1737729
A. Coutinho, P. Silveira, C. Pita, M. Santos, Catarina Saraiva, Natacha Catarina Perpétuo
Abstract The pollen morphology of the Iberian taxa of the genus Xanthium s.l. and of the non-Iberian species X. ambrosioides was studied to help to identify these poisonous, allergenic and invasive taxa and clarify their taxonomic relationships. In addition, the question of the existence and structure of a mesoaperture in the apertural system of Xanthium was also considered. The pollen grains of sections Acanthoxanthium and Xanthium clearly differ by their characters, which supports the separation of both taxa and allows for their distinction based on pollen morphology. It is suggested that the morphological and palynological differences between Xanthium and Acanthoxanthium, together with the lack of hybridisation between the two sections and the monophyly of Acanthoxanthium, could lead to the elevation of the latter to the generic status. The two species of section Xanthium present in the Iberian Peninsula (X. orientale and X. strumarium) and of section Acanthoxanthium are well separated by their palynological features. Likewise, the Iberian subspecies of Xanthium, X. orientale subsp. orientale and X. orientale subsp. italicum are palynologically distinguishable. However, no significant difference could be found between the pollen of X. strumarium subsp. strumarium and of X. strumarium subsp. brasilicum. The pollen data do not support the hypotheses of a hybrid origin for X. strumarium subsp. brasilicum. A mesoaperture intersecting the foot layer and the upper part of the endexine is present in both sections, which is congruent with the results already found for other Asteroideae.
{"title":"Pollen morphology of Xanthium L. (s.l.) (Asteraceae, Asteroideae, Heliantheae, Ambrosiinae) in the Iberian Peninsula - a palynotaxonomic approach to a poisonous, allergenic and invasive genus","authors":"A. Coutinho, P. Silveira, C. Pita, M. Santos, Catarina Saraiva, Natacha Catarina Perpétuo","doi":"10.1080/00173134.2020.1737729","DOIUrl":"https://doi.org/10.1080/00173134.2020.1737729","url":null,"abstract":"Abstract The pollen morphology of the Iberian taxa of the genus Xanthium s.l. and of the non-Iberian species X. ambrosioides was studied to help to identify these poisonous, allergenic and invasive taxa and clarify their taxonomic relationships. In addition, the question of the existence and structure of a mesoaperture in the apertural system of Xanthium was also considered. The pollen grains of sections Acanthoxanthium and Xanthium clearly differ by their characters, which supports the separation of both taxa and allows for their distinction based on pollen morphology. It is suggested that the morphological and palynological differences between Xanthium and Acanthoxanthium, together with the lack of hybridisation between the two sections and the monophyly of Acanthoxanthium, could lead to the elevation of the latter to the generic status. The two species of section Xanthium present in the Iberian Peninsula (X. orientale and X. strumarium) and of section Acanthoxanthium are well separated by their palynological features. Likewise, the Iberian subspecies of Xanthium, X. orientale subsp. orientale and X. orientale subsp. italicum are palynologically distinguishable. However, no significant difference could be found between the pollen of X. strumarium subsp. strumarium and of X. strumarium subsp. brasilicum. The pollen data do not support the hypotheses of a hybrid origin for X. strumarium subsp. brasilicum. A mesoaperture intersecting the foot layer and the upper part of the endexine is present in both sections, which is congruent with the results already found for other Asteroideae.","PeriodicalId":50414,"journal":{"name":"Grana","volume":"60 1","pages":"35 - 56"},"PeriodicalIF":0.9,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/00173134.2020.1737729","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49236289","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 : 2020-12-02DOI: 10.1080/00173134.2020.1823466
U. Layek, Sourabh Bisui, R. Mondal, Nandita Das, S. De, P. Karmakar
Abstract In the present work, bee foraging plants were determined by palynological analysis of colony stored samples (honey and pollen) of Apis dorsata collected from southern West Bengal, India. Then flowering phenology and pollen morphologies were described to evaluate the forage preference of the bee species. In addition, chemical cues were analysed using gas chromatography-mass spectrometry (GC-MS). Foraging strategy of the bee species was profitable in that almost all the bee-visited plants were utilised for both nectar and pollen sources. The bee species became generalist visitor of several plants having diverse life form, flower characters and pollen morphologies. However, most of the bee-visited plants were of trees with synchronous type of flowering. Most plants had small-sized, yellow, cream and white coloured flowers and pollen was openly presented. We did not find any patterns in the morphological traits of bee collected pollen, though the pollen types were predominantly of medium sized with trizonocolporate apertural pattern and reticulate surface ornamentation. Floral volatile organic compounds (VOCs) of bee visited plants were also diversified. Compounds frequently found in the floral VOC bouquets were amphetamine-3-methyl; butane, 2-cyclopropyl; 2,3-butanediol; cyclohexan, 1-methyl-5-(1-methylethyl); d-limonene; methyl (2E)-2-methoxy-2-butenoate; phenol, 4-[2-(methylamino)ethyl]; phthalic acid, di(2-propylpentyl)ester; propanamide, N-(aminocarbonyl) and pyrrolo[1,2-a]pyrazine-1,4-dione, hexahydro-3-(2-methylpropyl). In conclusion, floral traits and chemical cues of plants influence the host selection specificity (to collect floral rewards) of the rock bees.
{"title":"Floral traits and chemical cues associated with rock bee (Apis dorsata Fabricius) for the host selection in West Bengal, India","authors":"U. Layek, Sourabh Bisui, R. Mondal, Nandita Das, S. De, P. Karmakar","doi":"10.1080/00173134.2020.1823466","DOIUrl":"https://doi.org/10.1080/00173134.2020.1823466","url":null,"abstract":"Abstract In the present work, bee foraging plants were determined by palynological analysis of colony stored samples (honey and pollen) of Apis dorsata collected from southern West Bengal, India. Then flowering phenology and pollen morphologies were described to evaluate the forage preference of the bee species. In addition, chemical cues were analysed using gas chromatography-mass spectrometry (GC-MS). Foraging strategy of the bee species was profitable in that almost all the bee-visited plants were utilised for both nectar and pollen sources. The bee species became generalist visitor of several plants having diverse life form, flower characters and pollen morphologies. However, most of the bee-visited plants were of trees with synchronous type of flowering. Most plants had small-sized, yellow, cream and white coloured flowers and pollen was openly presented. We did not find any patterns in the morphological traits of bee collected pollen, though the pollen types were predominantly of medium sized with trizonocolporate apertural pattern and reticulate surface ornamentation. Floral volatile organic compounds (VOCs) of bee visited plants were also diversified. Compounds frequently found in the floral VOC bouquets were amphetamine-3-methyl; butane, 2-cyclopropyl; 2,3-butanediol; cyclohexan, 1-methyl-5-(1-methylethyl); d-limonene; methyl (2E)-2-methoxy-2-butenoate; phenol, 4-[2-(methylamino)ethyl]; phthalic acid, di(2-propylpentyl)ester; propanamide, N-(aminocarbonyl) and pyrrolo[1,2-a]pyrazine-1,4-dione, hexahydro-3-(2-methylpropyl). In conclusion, floral traits and chemical cues of plants influence the host selection specificity (to collect floral rewards) of the rock bees.","PeriodicalId":50414,"journal":{"name":"Grana","volume":"60 1","pages":"310 - 323"},"PeriodicalIF":0.9,"publicationDate":"2020-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/00173134.2020.1823466","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41381098","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 : 2020-11-25DOI: 10.1080/00173134.2020.1821765
M. Rösch, Elena Marinova
In southwest Germany the Weichselian Rhein glacier covered a triangular area of 2200 km2, leaving behind a moraine landscape with many lakes. One of those lakes is Zeller See, situated at 577 m abo...
{"title":"51. Zeller See","authors":"M. Rösch, Elena Marinova","doi":"10.1080/00173134.2020.1821765","DOIUrl":"https://doi.org/10.1080/00173134.2020.1821765","url":null,"abstract":"In southwest Germany the Weichselian Rhein glacier covered a triangular area of 2200 km2, leaving behind a moraine landscape with many lakes. One of those lakes is Zeller See, situated at 577 m abo...","PeriodicalId":50414,"journal":{"name":"Grana","volume":"60 1","pages":"243 - 245"},"PeriodicalIF":0.9,"publicationDate":"2020-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/00173134.2020.1821765","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41413475","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 : 2020-11-18DOI: 10.1080/00173134.2020.1821088
R. S. Pinto, Márcia Maria Corrêa Rêgo, P. D. de Albuquerque
Abstract This study aimed to identify the pollen types present in the honey of Melipona fasciculata and Melipona subnitida in a Restinga area (plant communities under a marine influence) and identify pollen grains that belonged to plants with nectar resouces. In total, 56 pollen types were found in the honey samples of the two bee species studied, with a large number of representatives from the Fabaceae and Myrtaceae families. Melipona subnitida honey had higher pollen richness, diversity and evenness than M. fasciculata honey. Many of the pollen types identified in the samples were considered nectarless, but 28 types belonged to plants that produce nectar. The main nectar-producing specie found was Humiria balsamifera, particularly in M. fasciculata honey. Other important sources of nectar were Chrysobalanus icaco, Protium heptaphyllum and Coccoloba. Our results are vital for conservation and management programmes because the maintenance of social bee populations depends upon constant resource collection.
{"title":"Honey pollen spectra of two species of stingless bee (Apidae: Meliponini) in Lençóis Maranhenses National Park, Brazil","authors":"R. S. Pinto, Márcia Maria Corrêa Rêgo, P. D. de Albuquerque","doi":"10.1080/00173134.2020.1821088","DOIUrl":"https://doi.org/10.1080/00173134.2020.1821088","url":null,"abstract":"Abstract This study aimed to identify the pollen types present in the honey of Melipona fasciculata and Melipona subnitida in a Restinga area (plant communities under a marine influence) and identify pollen grains that belonged to plants with nectar resouces. In total, 56 pollen types were found in the honey samples of the two bee species studied, with a large number of representatives from the Fabaceae and Myrtaceae families. Melipona subnitida honey had higher pollen richness, diversity and evenness than M. fasciculata honey. Many of the pollen types identified in the samples were considered nectarless, but 28 types belonged to plants that produce nectar. The main nectar-producing specie found was Humiria balsamifera, particularly in M. fasciculata honey. Other important sources of nectar were Chrysobalanus icaco, Protium heptaphyllum and Coccoloba. Our results are vital for conservation and management programmes because the maintenance of social bee populations depends upon constant resource collection.","PeriodicalId":50414,"journal":{"name":"Grana","volume":"60 1","pages":"217 - 230"},"PeriodicalIF":0.9,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/00173134.2020.1821088","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45036850","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 : 2020-11-18DOI: 10.1080/00173134.2020.1825794
S. Singh, P. Shukla, N. Dubey, S. K. Shukla
Abstract A new umbellate ornamentation pattern is described in Isoetes megaspores based on scanning electron microscopy and thorough comparisons with sculptural patterns documented in lycophytes and ferns. The umbellate ornamentation is quite distinct from other vertically projected megaspore sculptural patterns (baculate, clavate, gemmulate, pustulate, tuberculate, saccate and verrucate). In addition, megaspore ornamentations described previously for I. dixitei as tuberculate or pustulate have now been corrected as umbellate. This species also possesses a rudimentary velum and internal pigmentation in sporangial wall which has not been reported in other Indian species of the genus. Further, this taxa has a range restricted to the Western Ghats and is confined to a higher elevational range than Indian species characterised by vertically projected megaspore surface ornamentation patterns.
{"title":"The significance of a new umbellate ornamentation in Isoetes (Isoetaceae: Lycopodiopsida) megaspores","authors":"S. Singh, P. Shukla, N. Dubey, S. K. Shukla","doi":"10.1080/00173134.2020.1825794","DOIUrl":"https://doi.org/10.1080/00173134.2020.1825794","url":null,"abstract":"Abstract A new umbellate ornamentation pattern is described in Isoetes megaspores based on scanning electron microscopy and thorough comparisons with sculptural patterns documented in lycophytes and ferns. The umbellate ornamentation is quite distinct from other vertically projected megaspore sculptural patterns (baculate, clavate, gemmulate, pustulate, tuberculate, saccate and verrucate). In addition, megaspore ornamentations described previously for I. dixitei as tuberculate or pustulate have now been corrected as umbellate. This species also possesses a rudimentary velum and internal pigmentation in sporangial wall which has not been reported in other Indian species of the genus. Further, this taxa has a range restricted to the Western Ghats and is confined to a higher elevational range than Indian species characterised by vertically projected megaspore surface ornamentation patterns.","PeriodicalId":50414,"journal":{"name":"Grana","volume":"60 1","pages":"247 - 255"},"PeriodicalIF":0.9,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/00173134.2020.1825794","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44516046","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 : 2020-11-12DOI: 10.1080/00173134.2020.1815831
C. D. da Luz, S. Chaves, Cristiane Bonaldi Cano
Abstract Twenty honey samples of Apis mellifera were collected during the main flowering period (July–October) between 2003 and 2018. Six apiaries in Mato Grosso (MT) state and three apiaries in Mato Grosso do Sul (MS) state were sampled. The vegetation in the region is non-flooding, seasonally flooded and aquatic savanna with scattered forested patches (seasonal semi-deciduous forest, Cerrado and Cerradão). Samples were analysed by non-acetolysed method in order to understand the relative pollen frequencies. A principal component analysis (PCA) was used to compare the similarity between the samples. Within the 13 MT honey samples, 63 pollen types from 55 genera and 40 families were identified, as well as three undetermined pollen types. Monofloral MT honey of Curatella americana (‘lixeira’) and Myracrodruon urundeva (‘aroeira’) were recognised. In the seven MS honey samples, a total of 40 pollen types from 32 genera and 24 families were identified. Monofloral MS honey included Myracrodruon urundeva, Stryphnodendron adstringens (‘barbatimão’) and Richardia (‘bernarda’). The results of the analyses did not correspond to the flowering sources declared by the beekeepers. To ensure the palynological differentiation of Pantanal honey required by international trade as PGI (Protected Geographical Indication), a greater control over its botanical origin is necessary, through melissopalynological analysis.
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