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

doi:10.1071/FP19194

CORC > 植物研究所 > 中国科学院植物研究所 > 中科院北方资源植物重点实验室

	Evaluating physiological changes of grass and semishrub species with seasonality for understanding the process of shrub encroachment in semiarid grasslands
	Yang, Liu 2; Zhou, Jihua ; Lai, Liming ; Sun, Qinglin 2; Yi, Sangui 2; Jiang, Lianhe ; Zheng, Yuanrun
刊名	FUNCTIONAL PLANT BIOLOGY
	2020
卷号	47 期号:7 页码:628-638
关键词	antioxidant enzyme activity osmotic adjustment compounds
ISSN号	1445-4408
DOI	10.1071/FP19194
文献子类	Article
英文摘要	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.
学科主题	Plant Sciences
电子版国际标准刊号	1445-4416
出版地	CLAYTON
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
语种	英语
出版者	CSIRO PUBLISHING
WOS记录号	WOS:000537906700004
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41330749]
内容类型	期刊论文
源URL	[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.Univ Chinese Acad Sci, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Bot, Key Lab Resource Plants, West China Subalpine Bot Garden, 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.