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Mechanistic examination of causes for narrow distribution in an endangered shrub: a comparison of its responses to drought stress with a widespread congeneric species

文献类型：期刊论文

作者Cui, Hongxia; Cong, Shuhua2; Wang, Xianzhong3; Hao, Haiping; Shi, Lei; Zhang, Huijin; Li, Zhigang4; Hu, Tianhua4; Qin, Yongsheng5
刊名TREES-STRUCTURE AND FUNCTION
出版日期2016
卷号30期号:6页码:2227-2236
关键词Endangered species Hydrotropism Lilac Photosynthesis Soil water Syringa
ISSN号0931-1890
DOI10.1007/s00468-016-1448-8
文献子类Article
英文摘要The endangered status and narrow distribution in Syringa pinnatifolia , a sub-alpine shrub species, were primarily caused by its poor drought adaptation related to its lower degree of physiological adjustment despite its greater degree of morphological plasticity. Although deep rooting is usually considered a drought-tolerant trait, we found that Syringa pinnatifolia, a deep rooting and hydrotropic shrub, has a limited distribution in arid areas. To elucidate the mechanisms for its narrow distribution, we conducted two experiments to examine the physiological and morphological responses to water availability and heterogeneity in S. pinnatifolia and a widespread congeneric species, S. oblata. We measured gas exchange, water use efficiency, and plasticity index in plants of these two species grown at different levels of soil water regimes and in containers with patched water distribution. Our results showed that high photosynthetic capacity in the narrowly distributed S. pinnatifolia was an important factor enabling its survival in the harsh sub-alpine environment. High photosynthetic capacity in S. pinnatifolia, however, was obtained at the expense of high transpiratory water loss, resulting in lower integrative water use efficiency. Biomass allocation to roots in S. pinnatifolia increased by 73 % when soil water increased from 75 to 95 % field capacity, suggesting that S. pinnatifolia could be less competitive for above-ground resources under favorable water regimes. The horizontal root hydrotropism and vertical root hydrotropism of S. pinnatifolia in soil with patched water patterns were likely related to compensation for leaf water loss at low soil water level, indicating a limited capacity for homeostasis within the plant for water conservation and lower level of inherent drought-tolerance. In summary, greater degree of morphological plasticity but lower degree of physiological adjustment may be the main causes for the hydrotropism and narrow distribution of S. pinnatifolia in the sub-alpine habitats.
学科主题Forestry
出版地HEIDELBERG
电子版国际标准刊号1432-2285
WOS关键词HYDRAULIC CONDUCTIVITY ; STOMATAL CONDUCTANCE ; PLANT ; PLASTICITY ; EVOLUTION ; LIGHT ; DIVERSITY ; GROWTH ; LIMITS ; ROOTS
WOS研究方向Science Citation Index Expanded (SCI-EXPANDED)
语种英语
WOS记录号WOS:000387723300027
出版者SPRINGER HEIDELBERG
资助机构National Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [30570175, 31370361] ; Knowledge Innovation Project of Chinese Academy of SciencesKnowledge Innovation Program of the Chinese Academy of Sciences [KSCX2-YW-Z-059, KSCX2-EW-B-5, 863-2013AA102903]
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/24952]  
专题中科院北方资源植物重点实验室
作者单位1.Inst Gardening, 13 Xinhua St, Hohhot 010030, Inner Mongolia, Peoples R China
2.Chinese Acad Sci, Inst Bot, 20 Nanxincun, Beijing 100093, Peoples R China
3.Univ Chinese Acad Sci, 15 Yuquanlu, Beijing 100049, Peoples R China
4.Indiana Univ Purdue Univ, Dept Biol, 723 West Michigan St, Indianapolis, IN 46202 USA
5.Helan Mt Natl Area, 71 Helan Rd, Yinchuan 750200, Peoples R China
推荐引用方式
GB/T 7714		 Cui, Hongxia,Cong, Shuhua,Wang, Xianzhong,et al. Mechanistic examination of causes for narrow distribution in an endangered shrub: a comparison of its responses to drought stress with a widespread congeneric species[J]. TREES-STRUCTURE AND FUNCTION,2016,30(6):2227-2236.
APA Cui, Hongxia.,Cong, Shuhua.,Wang, Xianzhong.,Hao, Haiping.,Shi, Lei.,...&Qin, Yongsheng.(2016).Mechanistic examination of causes for narrow distribution in an endangered shrub: a comparison of its responses to drought stress with a widespread congeneric species.TREES-STRUCTURE AND FUNCTION,30(6),2227-2236.
MLA Cui, Hongxia,et al."Mechanistic examination of causes for narrow distribution in an endangered shrub: a comparison of its responses to drought stress with a widespread congeneric species".TREES-STRUCTURE AND FUNCTION 30.6(2016):2227-2236.

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来源：植物研究所

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