首页|The Indo-Burma biodiversity hotspot for ferns:Updated phylogeny,hidden diversity,and biogeography of the java fern genus Leptochilus(Polypodiaceae)

The Indo-Burma biodiversity hotspot for ferns:Updated phylogeny,hidden diversity,and biogeography of the java fern genus Leptochilus(Polypodiaceae)

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The Indo-Burma Biodiversity Hotspot is renowned for its rich biodiversity,including that of vascular plants.However,the fern diversity and its endemism in this hotspot have not been well understood and so far,the diversity of very few groups of ferns in this region has been explored using combined mo-lecular and morphological approaches.Here,we updated the plastid phylogeny of the Java fern genus Leptochilus with 226(115％increase of the latest sampling)samples across the distribution range,spe-cifically those of three phylogenetically significant species,Leptochilus ovatus,L.pedunculatus,and L.pothifolius.We also reconstructed the first nuclear phylogeny of the genus based on pgiC gene data.Based on molecular and morphological evidence,we identified three new major clades and six new subclades,redefined three existing species,discovered a number of cryptic species of the genus,and elucidated the evolution of the three most variable characters.Our divergence time analyses and ancestral area reconstruction showed that Leptochilus originated in the Oligocene and diversified from early Miocene and 15 dispersal events from lower to higher latitudes are identified.The evolution of three most important morphological characters is analyzed in a context of the new phylogeny.Our analysis showed that 30(59％of total 51)species of Leptochilus occur in Indo-Burma hotspot,24(80％of the 30 species)of which are endemic to this hotspot.We argue that the Indo-Burma hotspot should be recognized as a diversity hotspot for ferns.

Cryptic speciationDispersals from lower to higher latitudesNuclear pgiC geneFern diversity hotspotJava fernsMicrosoroids

Liang Zhang、Zhen-Long Liang、Xue-Ping Fan、Ngan Thi Lu、Xin-Mao Zhou、Hong-Jin Wei、Li-Bing Zhang

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CAS Key Laboratory for Plant Diversity and Biogeography of East Asia,Kunming Institute of Botany,Chinese Academy of Sciences,Kunming,Yunnan 650201,China

CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province,Chengdu Institute of Biology,Chinese Academy of Sciences,P.O.Box 416,Chengdu,Sichuan 610041,China

Department of Biology,Vietnam National Museum of Nature,Vietnam Academy of Science and Technology,18 Hoang Quoc Viet,Ha Noi,Viet Nam

School of Ecology and Environmental Science & School of Life Sciences,Yunnan University,Kunming,Yunnan 650500,China

Eastern China Conservation Centre for Wild Endangered Plant Resources,Shanghai Chenshan Botanical Garden,Shanghai 201602,China

Missouri Botanical Garden,4344 Shaw Blvd.,St.Louis,MO 63110,USA

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2024

10.1016/j.pld.2024.08.005

植物多样性(英文)
中国科学院昆明植物研究所，中国植物学会

植物多样性(英文)

CSTPCD
影响因子：0.617
ISSN：2096-2703
年,卷(期)：2024.46(6)