首页|中国西南热带季风区石灰岩和非灰岩森林蕨类植物叶片性状的种间和种内适应性

中国西南热带季风区石灰岩和非灰岩森林蕨类植物叶片性状的种间和种内适应性

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在热带地区,石灰山森林(LFs)和非石灰山森林(NLFs)之间的植物通常表现出不同的分类学和功能型特征.蕨类植物是热带雨林的主要组成成分之一.然而,我们对LFs中分布的蕨类植物的形态和生理特征了解甚少.在本项研究中,我们评估了中国西南热带地区LFs和NLFs中的蕨类植物物种在7个叶片功能性状上的差异.我们测量了25种蕨类植物的叶片水分含量、形态特征(包括叶片大小、叶片厚度、气孔长度和气孔密度),以及生理特征(包括气孔导度和光合速率).研究结果表明,与NLFs相比,LFs中蕨类植物的叶片更厚、更小,气孔密度和气孔导度更低,这可能反映了它们的水分利用策略.然而,当考虑系统发育关系时,这些差异变得不显著了,这表明系统发育保守性影响了LFs和NLFs的性状差异并最终影响了物种组成.在LFs和NLFs中共同出现的一些物种具有一定的种内性状变异,在LFs中气孔密度更低.这些发现表明,只有少数蕨类植物的水分利用策略能够同时适应LFs和NLFs,因此蕨类植物不太可能发生适应性辐射.
Inter-and intraspecific adaptations of pteridophyte leaf traits in limestone and non-limestone forests of monsoon tropical regions of southwest China
Plant species often show different taxonomic and functional characteristics between limestone forests(LFs)and non-limestone forests(NLFs)in tropical regions.Pteridophyte species are one of the major components in tropical rainforests;however,the morphological and physiological characteristics of pteridophytes occurring in LFs are poorly understood.We evaluated the differences in seven leaf functional traits between pteridophyte species in LFs and NLFs in southwest China.We measured leaf water content,morphological traits including leaf size,leaf thickness,stomatal length and stomatal density(SD),and physiological traits including stomatal conductance and photosynthetic rate from a total of 25 species.We found that pteridophytes had thicker and smaller leaves with lower SD and stomatal conductance in LFs compared with NLFs,probably reflecting their adaptations in water use strategies.These differences,however,became non-significant when phylogenetic relationships were taken into account,suggesting that phylogenetic conservatism shapes trait differences and ultimately species composition in LFs and NLFs.Some species that were commonly found in both LFs and NLFs exhibited intraspecific variation between forest types,with lower SD in LFs.Our findings suggest that only a handful of pteridophyte species can adapt to their water use strategies in both LFs and NLFs,and thus adaptative radiation is unlikely to occur.

droughtfernlimestone forestpteridophytesleaf functional traitsXishuangbanna

Kittisack Phoutthavong、Masatoshi Katabuchi、Akihiro Nakamura、Xiao Cheng、Min Cao

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CAS Key Laboratory of Tropical Forest Ecology,Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Menglun,Mengla 666303,China

University of Chinese Academy of Sciences,Beijing 100049,China

Center of Plant Ecology,Core Botanical Gardens,Chinese Academy of Sciences,Menglun,Mengla 666303,China

Kunming Institute of Botany,Chinese Academy of Sciences,Kunming 650201,China

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干旱 蕨类 石灰山森林 蕨类植物 叶片功能性状 西双版纳

University of the Chinese Academy of Sciences(UCAS)MSc scholarship(2015-2018)CAS-TWAS President's Fellowship for International Doctoral Students(2018-2022)Chinese Academy of Sciences President's International Fellowship Initiative中国科学院战略规划重点项目High-End Foreign Experts Program of the High-Level Talent Recruitment Plan of Yunnan ProvinceNational Natural Science Foundation of China International(Regional)Cooperation and Exchange projectZiHui(Wisdom)Yunnan ProgramXishuangbanna State Rainforest Talent Support Program

2020FYB0003XDB310000003216116032432161160324202203AM140026

2023

10.1093/jpe/rtad026

植物生态学报(英文版)

植物生态学报(英文版)

CSCD
ISSN：1752-9921
年,卷(期)：2023.(6)
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