A new species of Riccardia, R. meagheri, is described from mountainous areas of northern Myanmar. The new species differs from other species by 1) inner cells of main axis and branches in thallus cross-section flattened, much wider than high, irregularly shaped and with curved cell walls, 2) dorsal epidermis cells mamillose protruding forwards, ventral epidermal cells enlarged, but externally flat, not mamillose, 3) a winged, translucent, single-layered margin on both the main axis and branches, 4) the identical structure of the main axis and branches in thallus cross-section.
描述了产自缅甸北部山区的 Riccardia 新种 R. meagheri。该新物种与其他物种的区别在于：1）在叶柄横截面上，主轴和分枝的内细胞扁平，宽度远大于高度，形状不规则，细胞壁弯曲；2）背表皮细胞具乳突向前突出，腹表皮细胞增大，但外部扁平，不具乳突；3）主轴和分枝的边缘均呈翼状，半透明，单层；4）在叶柄横截面上，主轴和分枝的结构相同。
{"title":"A new Riccardia (Aneuraceae, Marchantiophyta) from Myanmar","authors":"Frank Müller","doi":"10.11646/bde.46.1.7","DOIUrl":"https://doi.org/10.11646/bde.46.1.7","url":null,"abstract":"A new species of Riccardia, R. meagheri, is described from mountainous areas of northern Myanmar. The new species differs from other species by 1) inner cells of main axis and branches in thallus cross-section flattened, much wider than high, irregularly shaped and with curved cell walls, 2) dorsal epidermis cells mamillose protruding forwards, ventral epidermal cells enlarged, but externally flat, not mamillose, 3) a winged, translucent, single-layered margin on both the main axis and branches, 4) the identical structure of the main axis and branches in thallus cross-section.","PeriodicalId":93270,"journal":{"name":"Bryophyte diversity and evolution","volume":" 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139142718","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}
Si He, J. Shevock, Nikisha Patel, Olivia Lemieux, B. Goffinet
Florschuetziella scaberrima (Broth.) Vitt, previously known only from the type material collected in 1915 from Yunnan, China, was rediscovered nearly a century later in 2005. The species is morphologically indistinguishable from the Mexican endemic F. steerei Vitt, but given the paucity of material the two are provisionally retained as distinct, allopatric species. Both species exhibit traits reminiscent of Leratia neocaledonica Broth. & Paris, a species endemic to New Caledonia. A shared ancestry with the other species currently accommodated in Leratia Broth. & Paris, i.e., L. exigua (Sull.) Goffinet and L. obtusifolia (Hook.) Goffinet, and the phylogenetically nested position of Florschuetziella Vitt within Leratia supports the merger of the two generic names, and hence the transfer of species of Florschuetziella, prompting the proposed new combinations Leratia steerei (Vitt) Goffinet, S.He & Shevock and Leratia scaberrima (Broth.) Goffinet, S.He & Shevock.
{"title":"Rediscovery of the Chinese endemic Florschuetziella scaberrima (Bryophyta: Orthotrichaceae) a century after its description leads to its transfer to Leratia","authors":"Si He, J. Shevock, Nikisha Patel, Olivia Lemieux, B. Goffinet","doi":"10.11646/bde.45.1.12","DOIUrl":"https://doi.org/10.11646/bde.45.1.12","url":null,"abstract":"Florschuetziella scaberrima (Broth.) Vitt, previously known only from the type material collected in 1915 from Yunnan, China, was rediscovered nearly a century later in 2005. The species is morphologically indistinguishable from the Mexican endemic F. steerei Vitt, but given the paucity of material the two are provisionally retained as distinct, allopatric species. Both species exhibit traits reminiscent of Leratia neocaledonica Broth. & Paris, a species endemic to New Caledonia. A shared ancestry with the other species currently accommodated in Leratia Broth. & Paris, i.e., L. exigua (Sull.) Goffinet and L. obtusifolia (Hook.) Goffinet, and the phylogenetically nested position of Florschuetziella Vitt within Leratia supports the merger of the two generic names, and hence the transfer of species of Florschuetziella, prompting the proposed new combinations Leratia steerei (Vitt) Goffinet, S.He & Shevock and Leratia scaberrima (Broth.) Goffinet, S.He & Shevock.","PeriodicalId":93270,"journal":{"name":"Bryophyte diversity and evolution","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44421559","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}
D. Cargill, S. Chantanaorrapint, R. Zhu, A. Asthana, Lang Li, K. Renzaglia, J. A.
The family Anthocerotaceae is amongst the last remaining hornwort families to be tested for their monophyly. The recent publication of genomes for A. punctatus, A. agrestis and A. angustus has emphasized the need to understand generic and species boundaries within the family. Twenty-eight taxa within the family and three chloroplast genes were used to reconstruct a phylogeny, which supports a monophyletic Anthocerotaceae. Within the family, four clades are recognised, comprising subgenus Anthoceros, subgenus Indici, subg. nov, subgenus Australienses, subg. nov. and subgenus Sphaerosporoceros. Species currently circumscribed as Folioceros also form a separate clade, but as most taxa within the genus, including the type species, are yet to be sequenced no formal decisions have been made for this group.
{"title":"Resolving relationships within the hornwort genus Anthoceros","authors":"D. Cargill, S. Chantanaorrapint, R. Zhu, A. Asthana, Lang Li, K. Renzaglia, J. A.","doi":"10.11646/bde.45.1.2","DOIUrl":"https://doi.org/10.11646/bde.45.1.2","url":null,"abstract":"The family Anthocerotaceae is amongst the last remaining hornwort families to be tested for their monophyly. The recent publication of genomes for A. punctatus, A. agrestis and A. angustus has emphasized the need to understand generic and species boundaries within the family. Twenty-eight taxa within the family and three chloroplast genes were used to reconstruct a phylogeny, which supports a monophyletic Anthocerotaceae. Within the family, four clades are recognised, comprising subgenus Anthoceros, subgenus Indici, subg. nov, subgenus Australienses, subg. nov. and subgenus Sphaerosporoceros. Species currently circumscribed as Folioceros also form a separate clade, but as most taxa within the genus, including the type species, are yet to be sequenced no formal decisions have been made for this group.","PeriodicalId":93270,"journal":{"name":"Bryophyte diversity and evolution","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45931318","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}
G. Peñaloza-Bojacá, A. Sierra, H. Becher, K. Renzaglia, J. Villarreal A.
The transoceanic disjunct distributions between Australasia and Austral America have been observed in many plant groups. The processes behind these disjunct distributions remain a source of debate due to differences in species vagility, biogeographical history, and complex geological and climatic changes. We address the phylogenetic relationships and biogeographical history of the austral hornwort genus Phaeomegaceros based on eight molecular markers from the three genomes (nuclear: phytochrome, mitochondrial: nad5, and chloroplast: rbcL, trnL intron, trnL-trnF spacer, rps4 gene, rps4-trnS spacer, and matK gene). With ten taxa based on morphological and molecular data, the three phylogenetic analyses supported the genus Phaeomegaceros as monophyletic. Phaeomegaceros is composed of two major clades corresponding to the New Zealand species, which presents a conspicuous trilete mark with one depression in the middle of the spore’s proximal face, and the Austral American species, which lack this middle depression. Dating and biogeographical analyses indicate that the Phaeomegaceros ancestral area was New Zealand and Antarctica in the Late Cretaceous (53.51 Ma, HPD 95% = 31.64–72.63). While Austral American species diverged during the Eocene. We speculate that climatic fluctuations in the Antarctic continent during the middle to late-Miocene led to the isolation of Phaeomegaceros taxa with both processes (dispersal events and vicariance) acting on the independent evolution of the disjunct clades. Furthermore, recent diversification of Phaeomegaceros taxa in Austral America and range expansion to northern Andes and oceanic islands, are explained by dispersal events and subsequent cladogenesis coinciding with the uplift of the Andes and the formation of volcanic oceanic islands (Juan Fernandez and Tristan da Cunha).
{"title":"HISTORICAL BIOGEOGRAPHY OF THE AUSTRAL HORNWORT GENUS PHAEOMEGACEROS (DENDROCEROTACEAE, ANTHOCEROTOPHYTA)","authors":"G. Peñaloza-Bojacá, A. Sierra, H. Becher, K. Renzaglia, J. Villarreal A.","doi":"10.11646/bde.45.1.3","DOIUrl":"https://doi.org/10.11646/bde.45.1.3","url":null,"abstract":"The transoceanic disjunct distributions between Australasia and Austral America have been observed in many plant groups. The processes behind these disjunct distributions remain a source of debate due to differences in species vagility, biogeographical history, and complex geological and climatic changes. We address the phylogenetic relationships and biogeographical history of the austral hornwort genus Phaeomegaceros based on eight molecular markers from the three genomes (nuclear: phytochrome, mitochondrial: nad5, and chloroplast: rbcL, trnL intron, trnL-trnF spacer, rps4 gene, rps4-trnS spacer, and matK gene). With ten taxa based on morphological and molecular data, the three phylogenetic analyses supported the genus Phaeomegaceros as monophyletic. Phaeomegaceros is composed of two major clades corresponding to the New Zealand species, which presents a conspicuous trilete mark with one depression in the middle of the spore’s proximal face, and the Austral American species, which lack this middle depression. Dating and biogeographical analyses indicate that the Phaeomegaceros ancestral area was New Zealand and Antarctica in the Late Cretaceous (53.51 Ma, HPD 95% = 31.64–72.63). While Austral American species diverged during the Eocene. We speculate that climatic fluctuations in the Antarctic continent during the middle to late-Miocene led to the isolation of Phaeomegaceros taxa with both processes (dispersal events and vicariance) acting on the independent evolution of the disjunct clades. Furthermore, recent diversification of Phaeomegaceros taxa in Austral America and range expansion to northern Andes and oceanic islands, are explained by dispersal events and subsequent cladogenesis coinciding with the uplift of the Andes and the formation of volcanic oceanic islands (Juan Fernandez and Tristan da Cunha).","PeriodicalId":93270,"journal":{"name":"Bryophyte diversity and evolution","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44935833","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}
N. S. Allen, G. Dauphin, J. C. Villarreal, Caleb CASWELL-LEVY, Erin Cox, B. P., J. L., E. Hernández-Rodríguez, Karla Y. MAGAÑA-MARCIAL, A. Mežaka, Juan Diego RAMÍREZ-ROMÁN, Lilisbeth Rodríguez, Arianti Rojas Carvajal, Camila ROMERO-MORENO, A. Tomitani, Katherine ZEBALLOS-GRIJALVA
This is the first survey of bryophyte diversity in the mangroves of Panama. The study was done in the mangroves of Bocas del Toro Province, Panama, in September 2016 and, July, May and August 2017. Bryophytes were collected from prop or stilt roots of mangroves, the mid-lower part of the trunks and the lower branches. In areas inundated at high tide, additional samples were collected on the cortex of palms, its rootlets, other angiosperm trees and from decomposing logs. Twenty-six species of liverworts and seven of mosses were identified. The most diverse and predominant liverwort family was the Lejeuneaceae with twenty-two species and two varieties and, among the mosses, the Calymperaceae with three species. Species affinities with other tropical mangroves were analyzed and liverworts were found to be the dominant element. Among the liverworts collected, two are new reports for Panama: Ceratolejeunea confusa and Frullanoides mexicana. Additional surveys of the cryptogamic vegetation of Panamanian mangroves are urgently needed due to the accelerated deforestation caused by anthropic activities and the potential loss of important biodiversity.
{"title":"Bryophytes of mangroves of Bocas del Toro, Panama","authors":"N. S. Allen, G. Dauphin, J. C. Villarreal, Caleb CASWELL-LEVY, Erin Cox, B. P., J. L., E. Hernández-Rodríguez, Karla Y. MAGAÑA-MARCIAL, A. Mežaka, Juan Diego RAMÍREZ-ROMÁN, Lilisbeth Rodríguez, Arianti Rojas Carvajal, Camila ROMERO-MORENO, A. Tomitani, Katherine ZEBALLOS-GRIJALVA","doi":"10.11646/bde.45.1.9","DOIUrl":"https://doi.org/10.11646/bde.45.1.9","url":null,"abstract":"This is the first survey of bryophyte diversity in the mangroves of Panama. The study was done in the mangroves of Bocas del Toro Province, Panama, in September 2016 and, July, May and August 2017. Bryophytes were collected from prop or stilt roots of mangroves, the mid-lower part of the trunks and the lower branches. In areas inundated at high tide, additional samples were collected on the cortex of palms, its rootlets, other angiosperm trees and from decomposing logs. Twenty-six species of liverworts and seven of mosses were identified. The most diverse and predominant liverwort family was the Lejeuneaceae with twenty-two species and two varieties and, among the mosses, the Calymperaceae with three species. Species affinities with other tropical mangroves were analyzed and liverworts were found to be the dominant element. Among the liverworts collected, two are new reports for Panama: Ceratolejeunea confusa and Frullanoides mexicana. Additional surveys of the cryptogamic vegetation of Panamanian mangroves are urgently needed due to the accelerated deforestation caused by anthropic activities and the potential loss of important biodiversity.","PeriodicalId":93270,"journal":{"name":"Bryophyte diversity and evolution","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42364424","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}
A new species of Riccia is here described for the first time for Australia for section Piliferae, an infrageneric taxon which has its centre of diversity in southern Africa.
{"title":"Riccia epecenia: a new species of Riccia section Piliferae Volk from Australia","authors":"C. Cargill","doi":"10.11646/bde.45.1.6","DOIUrl":"https://doi.org/10.11646/bde.45.1.6","url":null,"abstract":"A new species of Riccia is here described for the first time for Australia for section Piliferae, an infrageneric taxon which has its centre of diversity in southern Africa.","PeriodicalId":93270,"journal":{"name":"Bryophyte diversity and evolution","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47752412","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}
For over 50 years, Jeffrey Graham Duckett has made vast and impactful contributions to multiple disciplines in bryology and across botany. He has inspired thousands of students of all ages through engaging classes and on unforgettable field excursions in sites across the globe (Fig. 1). His research students have gone on to make important contributions to biology and hold prestigious faculty, research and leadership positions. He has established productive and long-standing collaborations with numerous bryologists, and he is considered a treasured colleague who has uncanny insights that unveil the intricacies and beauty of the bryological world. This tribute to Jeff’s life and legacy cannot possibly do justice to the sweeping contributions he has made to his profession, and to the lives of his colleagues and students, rather we highlight his career path, and major accomplishments up to now that bridged multiple disciplines and have led to important advancements in bryology.
{"title":"In celebration of Jeffrey Graham Duckett’s unending curiosity and impactful contributions to bryology","authors":"K. Renzaglia, S. Pressel","doi":"10.11646/bde.45.1.1","DOIUrl":"https://doi.org/10.11646/bde.45.1.1","url":null,"abstract":"For over 50 years, Jeffrey Graham Duckett has made vast and impactful contributions to multiple disciplines in bryology and across botany. He has inspired thousands of students of all ages through engaging classes and on unforgettable field excursions in sites across the globe (Fig. 1). His research students have gone on to make important contributions to biology and hold prestigious faculty, research and leadership positions. He has established productive and long-standing collaborations with numerous bryologists, and he is considered a treasured colleague who has uncanny insights that unveil the intricacies and beauty of the bryological world. This tribute to Jeff’s life and legacy cannot possibly do justice to the sweeping contributions he has made to his profession, and to the lives of his colleagues and students, rather we highlight his career path, and major accomplishments up to now that bridged multiple disciplines and have led to important advancements in bryology.","PeriodicalId":93270,"journal":{"name":"Bryophyte diversity and evolution","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41402967","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}
We investigated whether the European near-endemic moss Drepanocladus lycopodioides has declined in its core distribution area in the southern Baltic Sea region and explored potential explanations for this. First, we re-visited sites with documented records from 1854 to 1957 in the Stockholm archipelago and nearby mainland in southern Sweden. Second, we compared the numbers and distributions of Swedish occurrences, their habitats, and substrates up to 1950 (289 herbarium records), and from 1951 onwards (347) using different map layers. Third, we explored whether inter-annual variation in reproductive performance was related to moisture conditions at five sites on an island in the Stockholm archipelago during nine years. We estimated moisture conditions based on precipitation data and dry days during the time when fertilization occurs in the year prior to sporophyte maturation. Drepanocladus lycopodioides has strongly decreased in intensively managed agricultural landscapes but remains frequent in natural or semi-natural habitats on limestone. Sporophyte development varied between years and depended on the weather condition during the fertilization period. Climate forecasts for the study area predict longer dry spells during late spring to late summer, which coincides with the timing of sexual branch initiation and fertilization in the species. We expect that sporophyte production will likely decrease in the future, which will affect the species’ abilities to re-colonize spots where it vanishes during years with poor growth conditions.
{"title":"Agricultural management, bedrock, and vulnerability of sexual reproduction to climate change affect the occurrence of a European near-endemic moss","authors":"I. Bisang, L. Hedenäs","doi":"10.11646/bde.45.1.11","DOIUrl":"https://doi.org/10.11646/bde.45.1.11","url":null,"abstract":"We investigated whether the European near-endemic moss Drepanocladus lycopodioides has declined in its core distribution area in the southern Baltic Sea region and explored potential explanations for this. First, we re-visited sites with documented records from 1854 to 1957 in the Stockholm archipelago and nearby mainland in southern Sweden. Second, we compared the numbers and distributions of Swedish occurrences, their habitats, and substrates up to 1950 (289 herbarium records), and from 1951 onwards (347) using different map layers. Third, we explored whether inter-annual variation in reproductive performance was related to moisture conditions at five sites on an island in the Stockholm archipelago during nine years. We estimated moisture conditions based on precipitation data and dry days during the time when fertilization occurs in the year prior to sporophyte maturation. Drepanocladus lycopodioides has strongly decreased in intensively managed agricultural landscapes but remains frequent in natural or semi-natural habitats on limestone. Sporophyte development varied between years and depended on the weather condition during the fertilization period. Climate forecasts for the study area predict longer dry spells during late spring to late summer, which coincides with the timing of sexual branch initiation and fertilization in the species. We expect that sporophyte production will likely decrease in the future, which will affect the species’ abilities to re-colonize spots where it vanishes during years with poor growth conditions.","PeriodicalId":93270,"journal":{"name":"Bryophyte diversity and evolution","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42765694","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}
Notothylas flabellata is reported for the first time in Mexico and North America, previously known only from Argentina in the American continent. This species was originally described from Africa. This species is characterized by absence of columella, dark brown to black tuberculate spores with distal hump-like globular projections and sub-quadrate to rectangular pseudoelaters with brown spiral-annular bands. In North America, this species might be confused with N. breutelii, but it can be differentiated by the presence of a columella in N. breutelii, and spore and pseudoelater ornamentation. Light microscopy photographs of N. flabellata and N. breutelii are provided. The new record increases the species number of Notothylas in North America to four.
{"title":"Notothylas flabellata (Notothyladaceae, Anthocerotopyta), an Afro-American hornwort newly found in Mexico","authors":"Ariadna Ibarra-Morales","doi":"10.11646/bde.45.1.4","DOIUrl":"https://doi.org/10.11646/bde.45.1.4","url":null,"abstract":"Notothylas flabellata is reported for the first time in Mexico and North America, previously known only from Argentina in the American continent. This species was originally described from Africa. This species is characterized by absence of columella, dark brown to black tuberculate spores with distal hump-like globular projections and sub-quadrate to rectangular pseudoelaters with brown spiral-annular bands. In North America, this species might be confused with N. breutelii, but it can be differentiated by the presence of a columella in N. breutelii, and spore and pseudoelater ornamentation. Light microscopy photographs of N. flabellata and N. breutelii are provided. The new record increases the species number of Notothylas in North America to four.","PeriodicalId":93270,"journal":{"name":"Bryophyte diversity and evolution","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45225267","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}
M. Ignatov, S. Polevova, U. Spirina, A. Skripnikov, Boris A. Novikov, E. Ignatova
New observations and an overview of the axillary hair structure in the groups of mosses sister to peristomate ones are provided. Three moss lineages, Takakiopsida, Sphagnopsida, and Andreaeobryopsida are characterized by mucilage release through the apical pore or otherwise apical structures. Axillary hairs of Andreaea however, differ from these lineages and are similar to all other mosses, where mucilage exudes through small temporary breakings along the entire cell wall of its upper cells. Fine structure of axillary hairs is illustrated for Sphagnum, Takakia, Andreaeobryum, and partly for Andreaea and Oedipodium, and general characteristics are given for most orders. A unique arrangement of axillary hairs is found in Sphagnum, where they occasionally appear not only in the leaf axils but also along the leaf base abaxially. Another rare feature of Sphagnum is that its axillary hairs are penetrable for fungi through the apical pore, which was previously known in mosses only for Takakia. A highly specialized structure regulating mucilage release in Takakia is described. Actin filaments and especially tubulin microtubules were found to be outstandingly abundant in axillary hairs of Physcomitrium but not in paraphyses, as seen in its GFP-labelled plants, and this feature may be common in other mosses.
{"title":"Axillary hairs in diverse moss lineages","authors":"M. Ignatov, S. Polevova, U. Spirina, A. Skripnikov, Boris A. Novikov, E. Ignatova","doi":"10.11646/bde.45.1.10","DOIUrl":"https://doi.org/10.11646/bde.45.1.10","url":null,"abstract":"New observations and an overview of the axillary hair structure in the groups of mosses sister to peristomate ones are provided. Three moss lineages, Takakiopsida, Sphagnopsida, and Andreaeobryopsida are characterized by mucilage release through the apical pore or otherwise apical structures. Axillary hairs of Andreaea however, differ from these lineages and are similar to all other mosses, where mucilage exudes through small temporary breakings along the entire cell wall of its upper cells. Fine structure of axillary hairs is illustrated for Sphagnum, Takakia, Andreaeobryum, and partly for Andreaea and Oedipodium, and general characteristics are given for most orders. A unique arrangement of axillary hairs is found in Sphagnum, where they occasionally appear not only in the leaf axils but also along the leaf base abaxially. Another rare feature of Sphagnum is that its axillary hairs are penetrable for fungi through the apical pore, which was previously known in mosses only for Takakia. A highly specialized structure regulating mucilage release in Takakia is described. Actin filaments and especially tubulin microtubules were found to be outstandingly abundant in axillary hairs of Physcomitrium but not in paraphyses, as seen in its GFP-labelled plants, and this feature may be common in other mosses.","PeriodicalId":93270,"journal":{"name":"Bryophyte diversity and evolution","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45275028","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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