Coping with alpine habitats:genomic insights into the adaptation strategies of Triplostegia glandulifera(Caprifoliaceae)

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外文摘要：How plants find a way to thrive in alpine habitats remains largely unknown.Here we present a chromosome-level genome assembly for an alpine medicinal herb,Triplostegia glandulifera(Caprifoliaceae),and 13 transcriptomes from other species of Dipsacales.We detected a whole-genome duplication event in T.glandulifera that occurred prior to the diversification of Dipsacales.Preferential gene retention after whole-genome duplication was found to contribute to increasing cold-related genes in T.glandulifera.A series of genes putatively associated with alpine adaptation(e.g.CBFs,ERF-Ⅶs,and RAD51C)exhibited higher expression levels in T.glandulifera than in its low-elevation relative,Lonicera japonica.Comparative genomic analysis among five pairs of high-vs low-elevation species,including a comparison of T.glandulifera and L.japonica,indicated that the gene families related to disease resistance experienced a significantly convergent contraction in alpine plants compared with their lowland relatives.The reduction in gene repertory size was largely concentrated in clades of genes for pathogen recognition(e.g.CNLs,prRLPs,and Ⅻ RLKs),while the clades for signal transduction and development remained nearly unchanged.This finding reflects an energy-saving strategy for survival in hostile alpine areas,where there is a tradeoff with less challenge from pathogens and limited resources for growth.We also identified candidate genes for alpine adaptation(e.g.RAD1,DMC1,and MSH3)that were under convergent positive selection or that exhibited a convergent acceleration in evolutionary rate in the investigated alpine plants.Overall,our study provides novel insights into the high-elevation adaptation strategies of this and other alpine plants.

作者：

Jian Zhang、Kai-Lin Dong、Miao-Zhen Ren、Zhi-Wen Wang、Jian-Hua Li、Wen-Jing Sun、Xiang Zhao、Xin-Xing Fu、Jian-Fei Ye、Bing Liu、Da-Ming Zhang、Mo-Zhu Wang、Gang Zeng、Yan-Ting Niu、Li-Min Lu、Jun-Xia Su、Zhong-Jian Liu、Pamela S.Soltis、Douglas E.Soltis、Zhi-Duan Chen

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作者单位：

State Key Laboratory of Plant Diversity and Specialty Crops & Key Laboratory of Systematic and Evolutionary Botany,Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China

China National Botanical Garden,Beijing 100093,China

University of Chinese Academy of Sciences,Beijing 100049,China

Key Laboratory of Resource Biology and Biotechnology in Western China,Ministry of Education,College of Life Sciences,Northwest University,Xi'an 710069,China

PubBio-Tech Services Corporation,Wuhan 430070,China

Biology Department,Hope College,Holland,MI 49423,USA

College of Life Sciences,Northwest Normal University,Lanzhou 730070,China

School of Ecology,Shenzhen Campus of Sun Yat-sen University,Shenzhen 518107,China

Sino-Africa Joint Research Center,Chinese Academy of Sciences,Wuhan 430074,China

Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Menglun 666303,China

School of Life Science,Shanxi Normal University,Taiyuan 030031,China

Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization,Fujian Agriculture and Forestry University,Fuzhou 350002,China

Florida Museum of Natural History,University of Florida,Gainesville,FL 32611,USA

Department of Biology,University of Florida,Gainesville,FL 32611-7800,USA

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基金：

Science Fund for Creative Research Groups of the National Natural Science Foundation of ChinaNational Natural Science Foundation of China(General Program)National Key Research Development Program of ChinaForestry Peak Discipline Construction Project of Fujian Agriculture and Forestry University

项目编号：

32221001320702332023YFF080580072202200205

出版年：

2024

DOI：

10.1093/hr/uhae077

园艺研究(英文)

CSTPCD

ISSN：

年,卷(期)：2024.11(5)