Divergence in Eco-Physiological Responses to Drought Mirrors the Distinct Distribution of Chamerion angustifolium Cytotypes in the Himalaya-Hengduan Mountains Region

doi:10.3389/fpls.2016.01329

	Divergence in Eco-Physiological Responses to Drought Mirrors the Distinct Distribution of Chamerion angustifolium Cytotypes in the Himalaya-Hengduan Mountains Region
	Guo, Wen; Yang, Jie; Sun, Xu-Dong; Chen, Guang-Jie; Yang, Yong-Ping; Duan, Yuan-Wen
	2016-08-31
发表期刊	FRONTIERS IN PLANT SCIENCE
卷号	7 期号:1 页码:1329
摘要	Polyploid species generally occupy harsher habitats (characterized by cold, drought and/or high altitude) than diploids, but the converse was observed for Chamerion angustifolium, in which diploid plants generally inhabit higher altitudes than their polyploid derivatives. Plants at high altitudes may experience cold-induced water stress, and we therefore examined the physiological responses of diploid and hexaploid angustifolium to water stress to better understand the ecological differentiation of plants with different ploidy levels. We conducted a common garden experiment by subjecting seedlings of different ploidy levels to low, moderate, and severe water stress. Fourteen indicators of physiological fitness were measured, and the anatomical characteristics of the leaves of each cytotype were determined. Both cytotypes were influenced by drought, and diploids exhibited higher fitness in terms of constant root:shoot ratio (R:S ratio) and maximum quantum yield of PS II (F-v/F-m), less reduced maximal photosynthetic rate (A(max)), transpiration rate (E), intercellular CO2 concentration (C-i) and stomatal conductance (gs), and higher long-term water use efficiency (WUEL) under severe water stress than did hexaploids. Analysis of leaf anatomy revealed morphological adjustments for tolerating water deficiency in diploids, in the form of closely packed mesophyll cells and small conduits in the midvein. Our results indicate that diploid C. angustifolium is more tolerant of drought than hexaploid plants, ensuring the successful survival of the diploid at high altitudes. This eco-physiological divergence may facilitate the species with different cytotypes to colonize new and large geographic ranges with heterogeneous environmental conditions.
关键词	C. Angustifolium Cytotype Distribution Common Garden Experiment Drought Tolerance Physiological Fitness
DOI	10.3389/fpls.2016.01329
收录类别	SCI
语种	英语
WOS记录号	WOS:000382284000001
引用统计	被引频次：17[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/28596
专题	中国科学院东亚植物多样性与生物地理学重点实验室
推荐引用方式 GB/T 7714	Guo, Wen,Yang, Jie,Sun, Xu-Dong,et al. Divergence in Eco-Physiological Responses to Drought Mirrors the Distinct Distribution of Chamerion angustifolium Cytotypes in the Himalaya-Hengduan Mountains Region[J]. FRONTIERS IN PLANT SCIENCE,2016,7(1):1329.
APA	Guo, Wen,Yang, Jie,Sun, Xu-Dong,Chen, Guang-Jie,Yang, Yong-Ping,&Duan, Yuan-Wen.(2016).Divergence in Eco-Physiological Responses to Drought Mirrors the Distinct Distribution of Chamerion angustifolium Cytotypes in the Himalaya-Hengduan Mountains Region.FRONTIERS IN PLANT SCIENCE,7(1),1329.
MLA	Guo, Wen,et al."Divergence in Eco-Physiological Responses to Drought Mirrors the Distinct Distribution of Chamerion angustifolium Cytotypes in the Himalaya-Hengduan Mountains Region".FRONTIERS IN PLANT SCIENCE 7.1(2016):1329.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
fpls-07-01329.pdf（1859KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	浏览下载