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Patterns and drivers of plant sexual systems in the dry-hot valley region of southwestern China

plant diversity 2024年第2期46卷 158-168页

作者： Rong Ma Qi Xu Yongqian Gao Deli Peng Hang Sun Bo Song state key laboratory of plant diversity and specialty crops/yunnan key laboratory for integrative conservation of plant species with extremely small populations Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China College of Life Sciences Shaanxi Normal UniversityXi'an 710119China yunnan Forestry Technological College Kunming 650224China School of Life Science/key laboratory of yunnan for Biomass Energy and Biotechnology of Environment Yunnan Normal UniversityKunming 650500YunnanChina

Sexual systems play important roles in angiosperm evolution and exhibit substantial variations among different floras. Thus, studying their evolution in a whole flora is crucial for understanding the formation and maintenance of plant biodiversity and predicting its responses to environmental change. In this study, we determined the patterns of plant sexual systems and their associations with geographic elements and various life-history traits in dry-hot valley region of southwestern China, an extremely vulnerable ecosystem. Of the 3166 angiosperm species recorded in this area, 74.5% were hermaphroditic,13.5% were monoecious and 12% were dioecious, showing a high incidence of diclinous species. Diclinous species were strongly associated with tropical elements, whereas hermaphroditic species were strongly associated with temperate and cosmopolitan elements. We also found that hermaphroditism was strongly associated with showy floral displays, specialist entomophily, dry fruits and herbaceous *** was strongly associated with inconspicuous, pale-colored flowers, generalist entomophily, fleshy fruits, and woody plants, whereas monoecy was strongly associated with inconspicuous, pale-colored flowers, anemophily, dry fruits, and herbaceous plants. In addition, hermaphroditic species with generalist entomophily tended to flower in the dry season, whereas diclinous species with specialist entomophily tended to flower in the rainy season. However, independent of sexual systems, plants that produce dry fruits tended to flower in the rainy season and set fruits in the dry season, but the opposite pattern was found for fleshy fruit-producing plants. Our results suggest that in the dry-hot valleys, plant sexual systems are associated with geographic elements as well as various life-history traits that are sensitive to environmental change.

关键词： Floral traits Fruit type Growth form Pollination system Reproductive phenology

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RAD-seq data reveals robust phylogeny and morphological evolutionary history of Rhododendron

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Horticultural plant Journal 2024年第3期10卷 866-878页

作者： Yuanting Shen Gang Yao Yunfei Li Xiaoling Tian Shiming Li Nian Wang Chengjun Zhang Fei Wang Yongpeng Ma yunnan key laboratory for integrative conservation of plant species with extremely small populations Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China key laboratory for plant diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China University of Chinese Academy of Sciences Beijing 100049China Beijing Genomics of Institute ShenzhenGuangdong 518120China Guiyang Institute of Humanities and Technology GuiyangGuizhou 550025China state Forestry and Grassland Administration key laboratory of Silviculture in Downstream Areas of the Yellow River College of ForestryShandong Agricultural UniversityTai'anShandong 271018China The Southwest China of Germplasm Bank of Wild species Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China West China Subalpine Botanical Garden Institute of BotanyChinese Academy of SciencesChengduSichuan 611834China

Rhododendron is famous for its high ornamental ***,the genus is taxonomically difficult and the relationships within Rhododendron remain *** addition,the origin of key morphological characters with high horticulture value need to be *** problems largely hinder utilization of germplasm *** studies attempted to disentangle the phylogeny of Rhododendron,but only used a few genomic markers and lacked large-scale sampling,resulting in low clade support and contradictory phylogenetic ***,we used restriction-site associated DNA sequencing(RAD-seq)data and morphological traits for 144 species of Rhododendron,representing all subgenera and most sections and subsections of this species-rich genus,to decipher its intricate evolutionary history and reconstruct ancestral *** results revealed high resolutions at subgenera and section levels of Rhododendron based on RAD-seq *** optimal phylogenetic tree and split tree recovered five lineages among ***(cladeⅠ)formed the basal *** and Azaleastrum formed cladeⅡand had sister ***Ⅲincluded all scaly rhododendron ***(cladeⅣ)formed a sister group to ***(cladeⅤ).The results of ancestral state reconstruction showed that Rhododendron ancestor was a deciduous woody plant with terminal inflorescence,ten stamens,leaf blade without scales and broadly funnelform corolla with pink or purple *** study shows significant distinguishability to resolve the evolutionary history of Rhododendron based on high clade support of phylogenetic tree constructed by RAD-seq *** also provides an example to resolve discordant signals in phylogenetic trees and demonstrates the application feasibility of RAD-seq with large amounts of missing data in deciphering intricate evolutionary ***,the reconstructed ancestral state of six important characters provides insights into the inn

关键词： Rhododendron RAD-seq Missing data Quartet sampling(QS) Ancestral state reconstruction

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Pleistocene glaciation advances the cryptic speciation of Stellera chamaejasme *** a major biodiversity hotspot

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Journal of integrative plant Biology 2024年第6期66卷 1192-1205页

作者： Santosh Kumar Rana Hum Kala Rana Jacob BLandis Tianhui Kuang Juntong Chen Hengchang Wang Tao Deng Charles C.Davis Hang Sun CAS key laboratory for plant diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China Arkansas Biosciences Institute Arkansas State UniversityJonesboroArkansas 72401USA School of integrative plant Science Section of Plant Biology and the L.H.Bailey HortoriumCornell UniversityIthacaNew York 14853USA BTI Computational Biology Center Boyce Thompson InstituteIthacaNew York 14853USA CAS key laboratory of plant Germplasm Enhancement and specialty Agriculture Chinese Academy of SciencesWuhan Botanical GardenWuhan 430074China Department of Organismic and Evolutionary Biology HerbariaHarvard UniversityCambridgeMassachusetts 02138USA

The mountains of Southwest China comprise a significant large mountain range and biodiversity hotspot imperiled by global climate *** high species diversity in this mountain system has long been attributed to a complex set of factors,and recent large-scale macroevolutionary investigations have placed a broad timeline on plant diversification that stretches from 10 million years ago(Mya)to the *** our increasing understanding of the temporal mode of speciation,finer-scale populationlevel investigations are lacking to better refine these temporal trends and illuminate the abiotic and biotic influences of cryptic *** is largely due to the dearth of organismal sampling among closely related species and populations,spanning the incredible size and topological heterogeneity of this *** study dives into these evolutionary dynamics of speciation using genomic and ecomorphological data of Stellera chamaejasme *** identified four previously unrecognized cryptic species having indistinct morphological traits and large metapopulation of evolving lineages,suggesting a more recent diversification(~2.67-0.90 Mya),largely influenced by Pleistocene glaciation and biotic *** factors likely influenced allopatric speciation and advocated cyclical warming–cooling episodes along elevational gradients during the *** study refines the evolutionary timeline to be much younger than previously implicated and raises the concern that projected future warming may influence the alpine species diversity,necessitating increased conservation efforts.

关键词： cryptic speciation glacial-interglacial Hengduan Mountains north-south migration Stellera chamaejasme

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Does the critically endangered Rhododendron amesiae deserve top priority for conservation?

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plant diversity 2022年第6期44卷 625-628页

作者： Yi-Shan Ao Yu-Hang Chang De-Tuan Liu Yong-Bo Liu Yong-Peng Ma yunnan key laboratory for integrative conservation of plant species with extremely small populations Kunming Institute of BotanyChinese Academy of SciencesKunming650201China University of the Chinese Academy of Sciences Beijing100049China state key laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing100012China

The genus Rhododendron is the largest genus of woody plants in China,having extremely important horticultural value(Chamberlain et al.,1996).However,efforts have only recently been made to assess the conservation status of the *** to conservation category assessments on the Red List of Rhododendrons(Gibbs et al.,2011)and the Threatened species List of China's Higher plants(Qin et al.,2017),32.03%and 17.13%of rhododendrons are evaluated to be threatened.

关键词： Rhododendron endangered species

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Climate change impacts the distribution of Quercus section Cyclobalanopsis(Fagaceae),a keystone lineage in East Asian evergreen broadleaved forests

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plant diversity 2023年第5期45卷 552-568页

作者： Lin Lin Xiao-Long Jiang Kai-Qi Guo Amy Byrne Min Deng School of Ecology and Environmental Sciences Yunnan Key Laboratory of Plant Reproductive Adaptation and Evolutionary Ecology and Institute of BiodiversityYunnan UniversityKunming 650500YunnanChina laboratory of Ecology and Evolutionary Biology State Key Laboratory for Conservation and Utilization of BioResources in YunnanYunnan UniversityKunming 650500YunnanChina College of Forestry Central South University of Forestry and TechnologyChangsha 410004HunanChina Shanghai Chenshan Botanical Garden Shanghai 201602China The Morton Arboretum LileIL 60532-1293USA

East Asian evergreen broadleaved forests(EBFLs) harbor high species richness,but these ecosystems are severely impacted by global climate change and *** and managing EBLFs requires understanding dominant tree distribution *** this study,we used 29 species in Quercus section Cyclobalanopsis-a keystone lineage in East Asian EBLFs-as proxies to predict EBLF distribution dynamics using species distribution models(SDMs).We examined climatic niche overlap,similarity,and equivalency among seven biogeographical regions’ species using’ecospat’.We also estimated the effectiveness of protected areas in the predicted range to elucidate priority conservation *** results showed that the climatic niches of most geographical groups *** western species under the Indian summer monsoon regime were mainly impacted by temperature factors,whereas precipitation impacted the eastern species under the East Asian summer monsoon *** simulation predicted a northward range expansion of section Cyclobalanopsis between 2081 and 2100,except for the ranges of the three Himalayan species analyzed,which might shrink *** greatest shift of highly suitable areas was predicted for the species in the South Pacific,with a centroid shift of over 300 ***,only 7.56% of suitable habitat is currently inside protected areas,and the percentage is predicted to continue declining in the *** better conserve Asian EBLFs,establishing nature reserves in their northern distribution ranges,and transplanting the populations with predicted decreasing numbers and degraded habitats to their future highly suitable areas,should be high-priority objectives.

关键词： species distribution model(SDM) East Asian tropics and subtropics Biodiversity conservation Distribution dynamics Global climate change

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Three new species of Liparis s.l.(Orchidaceae:Malaxideae)from Southwest China based on morphological characters and phylogenetic evidence

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plant diversity 2021年第5期43卷 401-408页

作者： Ji-Dong Ya Dong-Liang Lin Zhou-Dong Han Lei Cai Zhi-Rong Zhang De-Ming He Xiao-Hua Jin Wen-Bin Yu Germplasm Bank of Wild species Kunming Institute of BotanyChinese Academy of SciencesLanhei Road 132HeilongtanKunmingYunnan650201China state key laboratory of Systematic and Evolutionary Botany and Herbarium Institute of BotanyChinese Academy of SciencesNanxincun20XiangshanBeijing100093China CAS key laboratory for plant Biodiversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan650201China University of Chinese Academy of Sciences Beijing100049China yunnan key laboratory for integrative conservation of plant species with extremely small populations Key Laboratory for Plant Diversity and Biogeography of East AsiaKunming Institute of BotanyChinese Academy of SciencesLanhei Road 132HeilongtanKunmingYunnan650201China Wenshan National Nature Reserve Administration WenshanYunnan663000China Center for integrative conservation Xishuangbanna Tropical Botanical GardenMenglaYunnan666303China Center of conservation Biology Core Botanical GardensChinese Academy of SciencesMenglaYunnan666303China Southeast Asia Biodiversity Research Institute Chinese Academy of ScienceYezinNay Pyi Taw05282Myanmar

Liparis aureolabella and L mengziensis,two new species from the karst region of southwestern China,and L bingzhongluoensis,a new species from montane region in yunnan,are described and illustrated.L aureolabella is easily distinguished from its relatives by having abaxially purple leave with purple reticulate veins prominent adaxially,a lip auriculate at base,and falcate-lanceolate *** mengziensis is closely related to *** and ***,but differs from them by having an ovate to broadly ovate leaf,purple lip and apex connate along the *** bingzhongluoensis is similar to Liparis nanlingensis,but the new species is characterized by having a lip with two transparent ridges on its disc,longitudinally concave basal callus and triangular column *** analyses based on nuclear ribosomal ITS and plastid matK sequences showed that L aureolabella and L mengziensis are nested with L petiolata or L auriculata in a monophyletic clade.L bingzhongluoensis is sister to a clade formed by ***,***,L sasakii and ***,morphological comparisons strongly support that the three species as separated species newly to science.

关键词： Liparis Orchidaceae Taxonomy yunnan

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Taxonomy notes on Vandeae(Orchidaceae)from China:Five new species and two new records

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plant diversity 2021年第5期43卷 379-389页

作者： Jian-Wu Li Ji-Dong Ya De-Ping Ye Cheng Liu Qiang Liu Rui Pan Zai-Xing He Bo Pan Jie Cai Dong-Liang Lin Xiao-Hua Jin Herbarium(HITBC) Center for Integrative ConservationXishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglunMengla YunnanCN-666303PR China Core Batanical Gardens Chinese Academy of SciencesMenglunMengla YunnanCN-666303PR China Germplasm Bank of Wild species Kunming Institute of BotanyChinese Academy of SciencesLanhei Road 132HeilongtanKunmingYunnanCN-650201PR China Pu'er Forestry and Grassland Bureau Pu'erYunnanCN-665000PR China yunnan Forestry Technological College Jindian RoadPanlong DistrictKunmingYunnan CN-650000PR China Ning'er Forestry and Grassland Bureau Ning'erYunnanCN-665100PR China Xishuangbanna state Nature Reserve YiwuMenglaYunnanCN-666306PR China National Herbarium(PE)and state key Lab of Systematic and Evolutionary Botany Institute of BotanyChinese Academy of SciencesNanxincun 20XiangshanBeijing CN-100093PR China

Five new species(Gastrochilus yei,Gastrochilus minimus,Luisia simaoensis,Taeniophyllum xizangense,Tuberolabium subulatum)and two newly recorded species(Cleisostoma tricornutum,Luisia inconspicua)of Vandeae(Orchidaceae)from China are described and *** yei is similar to *** and ***,but differs from them by having an epichile not lobed,the apex of the hypochile not bilobed,and a tine on the apex of the *** minimus is similar to ***,but can be distinguished from the latter by having a flabellate epichile that is densely hirsute on the adaxial surface and an inconspicuous central cushion;in addition,the hypochile of *** has a keel that extends to the apex of the *** xizangense is similar to *** and ***,but it is distinguished from them by having much bigger flowers,inflorescences densely covered with short-bristly hairs,papillae on the external surface of sepals,and bigger triangular-ovate *** simaoensis is similar to L magniflora and L ramosii,but can be easily distinguished from them by having lateral sepals longer than dorsal sepals and petals,lip with irregular and waved margins,and lip with bilobed *** inconspicua is moved from Gastrochilus to Luisia based on phylogenetic analyses of plastid matK sequence *** subulatum is similar to ***,but it can be easily distinguished from the latter by having an inflorescence much shorter than the leaves,yellow sepals and petals,and many small papillae outside the lip lobes.

关键词： New species New records Orchidaceae Vandeae China

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