Evaluating physiological changes of grass and semishrub species with seasonality for understanding the process of shrub encroachment in semiarid grasslands

doi:10.1071/FP19194

	Evaluating physiological changes of grass and semishrub species with seasonality for understanding the process of shrub encroachment in semiarid grasslands
	Yang, Liu 1; Zhou, Jihua ; Lai, Liming ; Sun, Qinglin 1; Yi, Sangui 1; Jiang, Lianhe ; Zheng, Yuanrun
	2020
发表期刊	FUNCTIONAL PLANT BIOLOGY
ISSN	1445-4408
卷号	47 期号:7 页码:628-638
摘要	Shrub encroachment occurs worldwide, especially in arid and semiarid grasslands. Changes in soil water in different layers affect the process of shrub encroachment. Understanding the biological and physiological responses of plant species to shrub encroachment is essential for explaining shrub encroachment. The dominant species in six typical plant communities changed from Stipa bungeana Trin. to Artemisia ordosica Krasch., representing different shrub-encroached grasslands. The gravimetric soil water content (SWC) and enzyme and osmotic adjustment compounds of the dominant species across shrub encroachment stages and growing seasons were measured to explain the shrub encroachment. Results showed that SWC decreased and then increased during the growing seasons. With the process of shrub encroachment, SWC first increased, then decreased. With increasing soil depth, SWC increased or decreased. Across seasons with decreasing SWC, enzyme activity decreased and then increased, and malondialdehyde content and osmotic adjustment compounds increased. With the process of shrub encroachment, enzyme activity, malondialdehyde content and osmotic adjustment compounds increased or decreased. The two dominant species (S. bungeana and A. ordosica) enhanced their drought resistance abilities by regulating their antioxidant systems and osmotic adjustment compounds when soil water in a specific layer was not over the threshold. We recommend increasing the clay content to increase the water holding capacity in the surface soil layer to restore the zonal vegetation of S. bungeana.
关键词	antioxidant enzyme activity osmotic adjustment compounds
学科领域	Plant Sciences
DOI	10.1071/FP19194
收录类别	SCI
语种	英语
WOS关键词	WOODY PLANT ENCROACHMENT ; DROUGHT STRESS ; BIOCHEMICAL RESPONSES ; WATER-STRESS ; PRECIPITATION ; MECHANISMS ; TOLERANCE ; SEEDLINGS ; ENZYMES ; TRAITS
WOS研究方向	Plant Sciences
WOS记录号	WOS:000537906700004
出版者	CSIRO PUBLISHING
文献子类	Article
出版地	CLAYTON
EISSN	1445-4416
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41330749]
作者邮箱	zhengyr@ibcas.ac.cn
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/21734
专题	中科院北方资源植物重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, Key Lab Resource Plants, West China Subalpine Bot Garden, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Yang, Liu,Zhou, Jihua,Lai, Liming,et al. Evaluating physiological changes of grass and semishrub species with seasonality for understanding the process of shrub encroachment in semiarid grasslands[J]. FUNCTIONAL PLANT BIOLOGY,2020,47(7):628-638.
APA	Yang, Liu.,Zhou, Jihua.,Lai, Liming.,Sun, Qinglin.,Yi, Sangui.,...&Zheng, Yuanrun.(2020).Evaluating physiological changes of grass and semishrub species with seasonality for understanding the process of shrub encroachment in semiarid grasslands.FUNCTIONAL PLANT BIOLOGY,47(7),628-638.
MLA	Yang, Liu,et al."Evaluating physiological changes of grass and semishrub species with seasonality for understanding the process of shrub encroachment in semiarid grasslands".FUNCTIONAL PLANT BIOLOGY 47.7(2020):628-638.

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