David C. Shaw, Luiza Teixeira-Costa, David M. Watson, Simon F. Shamoun
Botany, Volume 102, Issue 3, Page 56-57, March 2024.
植物学》，第 102 卷，第 3 期，第 56-57 页，2024 年 3 月。
{"title":"Introduction to the Special Issue on Parasitic Flowering Plants in Forests","authors":"David C. Shaw, Luiza Teixeira-Costa, David M. Watson, Simon F. Shamoun","doi":"10.1139/cjb-2024-0011","DOIUrl":"https://doi.org/10.1139/cjb-2024-0011","url":null,"abstract":"Botany, Volume 102, Issue 3, Page 56-57, March 2024. <br/>","PeriodicalId":9092,"journal":{"name":"Botany","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140107126","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}
Botany, Ahead of Print. The taxonomic classification of dwarf mistletoes (Arceuthobium spp., Viscaceae) in series Campylopoda requires a multi-trait approach, integrating plant genetics, morphologies, and phenologies as well as their host and geographic distributions. Thus, competing interpretations on the contribution of these traits to defining species and subspecies boundaries has spurred considerable debate. Accordingly, the recent reclassification of 12 previously recognized species in ser. Campylopoda to separate subspecies of Arceuthobium campylopodum in the Flora of North America (FNA) has furthered this debate. We contend that these taxa deserve separate species recognition, while subspecies described prior to and after the recombination of ser. Campylopoda taxa in the FNA also deserve recognition. Herein, we provide evidence that the treatment in the FNA does not adequately reflect the diverse morphological, geographic, host, and phenological differences across the series, and hence, we maintain that the reclassification of ser. Campylopoda taxa was not justified according to empirical evidence published prior to and following the FNA treatment. We conclude our critique of the FNA treatment of ser. Campylopoda by advocating for the continued application of the Hawksworth and Wiens’ classification system, with minor modifications to the constitution of the series.
{"title":"Perspectives on the reclassification of taxa in the Arceuthobium campylopodum complex (Viscaceae)","authors":"Shawn C. Kenaley, Robert L. Mathiasen","doi":"10.1139/cjb-2023-0113","DOIUrl":"https://doi.org/10.1139/cjb-2023-0113","url":null,"abstract":"Botany, Ahead of Print. <br/> The taxonomic classification of dwarf mistletoes (Arceuthobium spp., Viscaceae) in series Campylopoda requires a multi-trait approach, integrating plant genetics, morphologies, and phenologies as well as their host and geographic distributions. Thus, competing interpretations on the contribution of these traits to defining species and subspecies boundaries has spurred considerable debate. Accordingly, the recent reclassification of 12 previously recognized species in ser. Campylopoda to separate subspecies of Arceuthobium campylopodum in the Flora of North America (FNA) has furthered this debate. We contend that these taxa deserve separate species recognition, while subspecies described prior to and after the recombination of ser. Campylopoda taxa in the FNA also deserve recognition. Herein, we provide evidence that the treatment in the FNA does not adequately reflect the diverse morphological, geographic, host, and phenological differences across the series, and hence, we maintain that the reclassification of ser. Campylopoda taxa was not justified according to empirical evidence published prior to and following the FNA treatment. We conclude our critique of the FNA treatment of ser. Campylopoda by advocating for the continued application of the Hawksworth and Wiens’ classification system, with minor modifications to the constitution of the series.","PeriodicalId":9092,"journal":{"name":"Botany","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140002679","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}
Botany, Ahead of Print. Understanding patterns of variation in functional traits of hardwood trees is crucial for conserving and managing North American temperate forests under climate change. This study examined provenance variation of yellow birch (Betula alleghaniensis Britton) in growth, biomass allocation, leaf morphology, and stable carbon isotope composition. Trees were grown from 10 seed sources originating from across Canada and the northern USA. Height and diameter were not significantly related to climate at seed origin, suggesting that variation may be better explained by site factors, such as soil pH and soil moisture. In contrast, carbon isotope composition and leaf morphological traits were significantly correlated to climate variables including temperature, precipitation, and solar radiation. Provenances from warmer, drier localities tended to have higher stable carbon isotope ratio (δ13C), greater specific leaf area, and narrower leaf width than their counterparts from cooler, wetter climates. Thus, variation in leaf morphological traits appears to be involved in adaptation of yellow birch to variation in temperature and moisture availability across the species’ range. Our results suggest that there may exist potential for selection and breeding of drought-resistant yellow birch genotypes to aid in reforestation under climate change.
{"title":"Genetic variation in growth and leaf traits associated with local adaptation to climate in yellow birch (Betula alleghaniensis Britton)","authors":"A. Maloney, Q.L. Dang, P.M. Godakanda, A. Thomson","doi":"10.1139/cjb-2023-0095","DOIUrl":"https://doi.org/10.1139/cjb-2023-0095","url":null,"abstract":"Botany, Ahead of Print. <br/> Understanding patterns of variation in functional traits of hardwood trees is crucial for conserving and managing North American temperate forests under climate change. This study examined provenance variation of yellow birch (Betula alleghaniensis Britton) in growth, biomass allocation, leaf morphology, and stable carbon isotope composition. Trees were grown from 10 seed sources originating from across Canada and the northern USA. Height and diameter were not significantly related to climate at seed origin, suggesting that variation may be better explained by site factors, such as soil pH and soil moisture. In contrast, carbon isotope composition and leaf morphological traits were significantly correlated to climate variables including temperature, precipitation, and solar radiation. Provenances from warmer, drier localities tended to have higher stable carbon isotope ratio (δ13C), greater specific leaf area, and narrower leaf width than their counterparts from cooler, wetter climates. Thus, variation in leaf morphological traits appears to be involved in adaptation of yellow birch to variation in temperature and moisture availability across the species’ range. Our results suggest that there may exist potential for selection and breeding of drought-resistant yellow birch genotypes to aid in reforestation under climate change.","PeriodicalId":9092,"journal":{"name":"Botany","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140316070","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}
Joseline de Fátima Antunes, Vinícius Coelho Kuster, Thiago Alves Magalhães, Denis Coelho de Oliveira
Botany, Ahead of Print. The cell wall plays a primary role in plant growth, which is regulated by cellulose microfibrils, proteins, and pectins. Regarding pectins, the rate of homogalacturonan (HG) methylesterification and the type of rhamnogalacturonan side chains can mediate leaf development. Herein, we evaluated pectic compounds of the cell walls by immunocytochemistry during the leaf development of Baccharis dracunculifolia DC. and Baccharis platypoda DC. Leaves in different maturation stages (from leaf bud to 9th node) were collected in a rupestrian field and fixed in formalin, acetic acid for anatomical and immunocytochemical analyses using monoclonal antibodies (JIM5, JIM7, LM5, and LM6). Both species showed similar anatomical structures based on peculiar cell wall pectic matrices. Baccharis platypoda leaves reach precocious maturation in the 3rd node, while B. dracunculifolia reaches maturation in the 6th node. These results seem to be related to HGs already de-methylesterified in the leaf primordia located in the leaf bud of B. platypoda. Epitopes of (1→5) α-l-arabinan occurred only in the collenchyma of B. platypoda, supporting cell wall stability. (1→4) β-D-galactans showed different fluorescence intensities in the two species, which changed during leaf development. The different rates of leaf tissue maturation between the two Baccharis species are influenced by variations in the pectic compounds of the cell walls, especially regarding the rate of HG methylesterification.
{"title":"Leaf developmental patterns of two species of Baccharis (Asteraceae): an analysis based on cell wall pectins","authors":"Joseline de Fátima Antunes, Vinícius Coelho Kuster, Thiago Alves Magalhães, Denis Coelho de Oliveira","doi":"10.1139/cjb-2023-0041","DOIUrl":"https://doi.org/10.1139/cjb-2023-0041","url":null,"abstract":"Botany, Ahead of Print. <br/> The cell wall plays a primary role in plant growth, which is regulated by cellulose microfibrils, proteins, and pectins. Regarding pectins, the rate of homogalacturonan (HG) methylesterification and the type of rhamnogalacturonan side chains can mediate leaf development. Herein, we evaluated pectic compounds of the cell walls by immunocytochemistry during the leaf development of Baccharis dracunculifolia DC. and Baccharis platypoda DC. Leaves in different maturation stages (from leaf bud to 9th node) were collected in a rupestrian field and fixed in formalin, acetic acid for anatomical and immunocytochemical analyses using monoclonal antibodies (JIM5, JIM7, LM5, and LM6). Both species showed similar anatomical structures based on peculiar cell wall pectic matrices. Baccharis platypoda leaves reach precocious maturation in the 3rd node, while B. dracunculifolia reaches maturation in the 6th node. These results seem to be related to HGs already de-methylesterified in the leaf primordia located in the leaf bud of B. platypoda. Epitopes of (1→5) α-l-arabinan occurred only in the collenchyma of B. platypoda, supporting cell wall stability. (1→4) β-D-galactans showed different fluorescence intensities in the two species, which changed during leaf development. The different rates of leaf tissue maturation between the two Baccharis species are influenced by variations in the pectic compounds of the cell walls, especially regarding the rate of HG methylesterification.","PeriodicalId":9092,"journal":{"name":"Botany","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139772233","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}
{"title":"Botany editorial—climate and nature crisis is also about the health of plants","authors":"Liette Vasseur","doi":"10.1139/cjb-2023-0152","DOIUrl":"https://doi.org/10.1139/cjb-2023-0152","url":null,"abstract":"Botany, Ahead of Print. <br/>","PeriodicalId":9092,"journal":{"name":"Botany","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139508747","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}
Stephen D. Gottschalk, Aurélie Boissezon, Sarah E. Hamsher, Richard M. McCourt, Donna J. Perleberg, Paul M. Skawinski, Robin S. Sleith, Kenneth G. Karol
Botany, Ahead of Print. We contest the recently reported findings that suggest the presence of female gametangia in the North American range of the invasive macroalga Nitellopsis obtusa (Harrow-Lyle, T.J., Ginn, B.K., Kirkwood, A.E., and Melles, S.J. 2023. First report of female gametangia in the invasive macroalga starry stonewort (Nitellopsis obtusa) in North America. Botany, 101: 61–64. doi:10.1139/cjb-2022-0096). The claims do not clearly show identifying morphology of N. obtusa female gametangia, are inconsistent with known characeaen developmental biology, and do not provide the evidence commensurate with such a claim. More convincing observational data are required. To date, only male thalli of N. obtusa have been confirmed either with herbarium vouchers or clear images. The appearance of female gametangia would have significant implications for the invasion biology of N. obtusa as well as approaches to managing its spread.
植物学》，打印前。 最近有报道称，入侵大型藻类星石草（Nitellopsis obtusa）的北美分布区存在雌性配子器（Harrow-Lyle, T.J., Ginn, B.K., Kirkwood, A.E., and Melles, S.J. 2023.北美入侵大型藻类星石草（Nitellopsis obtusa）雌配子器的首次报告。doi:10.1139/cjb-2022-0096）。这些说法没有清楚地显示 N. obtusa 雌配子器的识别形态，与已知的characeaen 发育生物学不一致，也没有提供与这种说法相称的证据。需要更有说服力的观察数据。迄今为止，只有标本馆的凭证或清晰的图像证实了 N. obtusa 的雄蕊。雌配子器的出现将对欧鼠李的入侵生物学以及管理其扩散的方法产生重大影响。
{"title":"We do not see evidence for the presence of female gametangia (oospores) in North American Nitellopsis obtusa (Desvaux) J. Groves","authors":"Stephen D. Gottschalk, Aurélie Boissezon, Sarah E. Hamsher, Richard M. McCourt, Donna J. Perleberg, Paul M. Skawinski, Robin S. Sleith, Kenneth G. Karol","doi":"10.1139/cjb-2023-0102","DOIUrl":"https://doi.org/10.1139/cjb-2023-0102","url":null,"abstract":"Botany, Ahead of Print. <br/> We contest the recently reported findings that suggest the presence of female gametangia in the North American range of the invasive macroalga Nitellopsis obtusa (Harrow-Lyle, T.J., Ginn, B.K., Kirkwood, A.E., and Melles, S.J. 2023. First report of female gametangia in the invasive macroalga starry stonewort (Nitellopsis obtusa) in North America. Botany, 101: 61–64. doi:10.1139/cjb-2022-0096). The claims do not clearly show identifying morphology of N. obtusa female gametangia, are inconsistent with known characeaen developmental biology, and do not provide the evidence commensurate with such a claim. More convincing observational data are required. To date, only male thalli of N. obtusa have been confirmed either with herbarium vouchers or clear images. The appearance of female gametangia would have significant implications for the invasion biology of N. obtusa as well as approaches to managing its spread.","PeriodicalId":9092,"journal":{"name":"Botany","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139476937","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}
Riverine macrophytes are increasingly understood to influence both the physical and chemical dynamics of rivers by creating biogeochemical hotspots and stabilizing benthic sediments. They contribute carbon and nutrients to both aquatic and adjacent terrestrial ecosystems through senescence and herbivory. Here we report the relationships between Justicia americana biomass, stem length and stem density, and % carbon (%C), % nitrogen (%N), C:N, δ15N and δ13C relationships between tissues types (roots, stems, and leaves). Additionally, we report the effects of land use on the plant’s tissue. We found that 1) J. americana stem density and dry biomass were positively correlated (P<0.001); 2) δ13C and % N were significantly different in leaf and root tissue; 3) δ13C and δ15N were both positively correlated across tissue types; 4) Leaf C:N was less than ½ of root and stem tissue; 5) % C in leaf tissue was positively correlated (P<0.05) with forest cover and negatively correlated with urbanization and watershed area; and 6) provide evidence that J. americana utilizes a C3 photosynthetic pathway. Overall, this study provides novel insight into the ecology of J. americana by elucidating the nutritional quality of different plant tissues and stoichiometric changes in the plant in response to land use.
{"title":"Justicia americana exhibits stem density-aboveground biomass relationships and variability in elemental composition and isotopic signature across tissue types and land use gradients","authors":"James L Wood, E. T. Huff","doi":"10.1139/cjb-2023-0117","DOIUrl":"https://doi.org/10.1139/cjb-2023-0117","url":null,"abstract":"Riverine macrophytes are increasingly understood to influence both the physical and chemical dynamics of rivers by creating biogeochemical hotspots and stabilizing benthic sediments. They contribute carbon and nutrients to both aquatic and adjacent terrestrial ecosystems through senescence and herbivory. Here we report the relationships between Justicia americana biomass, stem length and stem density, and % carbon (%C), % nitrogen (%N), C:N, δ15N and δ13C relationships between tissues types (roots, stems, and leaves). Additionally, we report the effects of land use on the plant’s tissue. We found that 1) J. americana stem density and dry biomass were positively correlated (P<0.001); 2) δ13C and % N were significantly different in leaf and root tissue; 3) δ13C and δ15N were both positively correlated across tissue types; 4) Leaf C:N was less than ½ of root and stem tissue; 5) % C in leaf tissue was positively correlated (P<0.05) with forest cover and negatively correlated with urbanization and watershed area; and 6) provide evidence that J. americana utilizes a C3 photosynthetic pathway. Overall, this study provides novel insight into the ecology of J. americana by elucidating the nutritional quality of different plant tissues and stoichiometric changes in the plant in response to land use.","PeriodicalId":9092,"journal":{"name":"Botany","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138598375","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}
Botany, Volume 101, Issue 12, Page i-iii, December 2023.
植物学，第101卷，第12期，第i-iii页，2023年12月。
{"title":"Time to treat the climate and nature crisis as one indivisible global health emergency","authors":"","doi":"10.1139/cjb-2023-0144","DOIUrl":"https://doi.org/10.1139/cjb-2023-0144","url":null,"abstract":"Botany, Volume 101, Issue 12, Page i-iii, December 2023. <br/>","PeriodicalId":9092,"journal":{"name":"Botany","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138503336","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}
A.G.S. Silva-Filho, M.C.A. Sá, D.L. Komura, R. Braga-Neto, I.G. Baseia, P. Marinho, J.-M. Moncalvo, M. Roy, F. Wartchow
Botany, Volume 101, Issue 12, Page 570-581, December 2023. Lactifluus subg. Lactariopsis is a well-supported group of milkcaps occurring predominantly in tropical and subtropical ecosystems. This subgenus contains agaricoid and pleurotoid representatives and is the only group with members containing a secondary velum. The results of taxonomic and phylogenetic research into Lactifluus subg. Lactariopsis collected in Brazilian tropical forests (Amazon, Atlantic Rainforests, and Caatinga biomes) of the North and Northeast is presented here. Two new species are described: Lf. aurantioceraceus in sect. Neotropici, and Lf. reniformis in sect. Multicipites, newly delimited here. In addition, Lf. neotropicus has had its distribution expanded to the Caatinga biome, Lf. dunensis was confirmed in Lf. sect. Neotropici with new records from French Guiana, and Lf. annulifer was re-collected from the type locality. A combined dataset of nuclear rDNA internal transcribed spacer region and nuclear large subunit amplified sequences was analyzed and, based on its phylogenetic hypothesis, the two novel taxa and the new section were confirmed.
{"title":"Lactifluus subg. Lactariopsis (Russulales/Basidiomycota) from Brazilian tropical forests","authors":"A.G.S. Silva-Filho, M.C.A. Sá, D.L. Komura, R. Braga-Neto, I.G. Baseia, P. Marinho, J.-M. Moncalvo, M. Roy, F. Wartchow","doi":"10.1139/cjb-2023-0077","DOIUrl":"https://doi.org/10.1139/cjb-2023-0077","url":null,"abstract":"Botany, Volume 101, Issue 12, Page 570-581, December 2023. <br/> Lactifluus subg. Lactariopsis is a well-supported group of milkcaps occurring predominantly in tropical and subtropical ecosystems. This subgenus contains agaricoid and pleurotoid representatives and is the only group with members containing a secondary velum. The results of taxonomic and phylogenetic research into Lactifluus subg. Lactariopsis collected in Brazilian tropical forests (Amazon, Atlantic Rainforests, and Caatinga biomes) of the North and Northeast is presented here. Two new species are described: Lf. aurantioceraceus in sect. Neotropici, and Lf. reniformis in sect. Multicipites, newly delimited here. In addition, Lf. neotropicus has had its distribution expanded to the Caatinga biome, Lf. dunensis was confirmed in Lf. sect. Neotropici with new records from French Guiana, and Lf. annulifer was re-collected from the type locality. A combined dataset of nuclear rDNA internal transcribed spacer region and nuclear large subunit amplified sequences was analyzed and, based on its phylogenetic hypothesis, the two novel taxa and the new section were confirmed.","PeriodicalId":9092,"journal":{"name":"Botany","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138503338","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：