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Evaluating physiological changes of grass and semishrub species with seasonality for understanding the process of shrub encroachment in semiarid grasslands
Yang, Liu1; Zhou, Jihua; Lai, Liming; Sun, Qinglin1; Yi, Sangui1; Jiang, Lianhe; Zheng, Yuanrun
2020
Source PublicationFUNCTIONAL PLANT BIOLOGY
ISSN1445-4408
Volume47Issue:7Pages:628-638
AbstractShrub 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.
Keywordantioxidant enzyme activity osmotic adjustment compounds
Subject AreaPlant Sciences
DOI10.1071/FP19194
Indexed BySCI
Language英语
WOS KeywordWOODY PLANT ENCROACHMENT ; DROUGHT STRESS ; BIOCHEMICAL RESPONSES ; WATER-STRESS ; PRECIPITATION ; MECHANISMS ; TOLERANCE ; SEEDLINGS ; ENZYMES ; TRAITS
WOS Research AreaPlant Sciences
WOS IDWOS:000537906700004
PublisherCSIRO PUBLISHING
SubtypeArticle
Publication PlaceCLAYTON
EISSN1445-4416
Funding OrganizationNational Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41330749]
Corresponding Author Emailzhengyr@ibcas.ac.cn
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ibcas.ac.cn/handle/2S10CLM1/21734
Collection中科院北方资源植物重点实验室
Affiliation1.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
Recommended Citation
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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