气候变化领域集成服务门户(CCPortal): Proline Metabolism in Response to Climate Extremes in Hairgrass

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DOI	10.3390/plants13101408
	Proline Metabolism in Response to Climate Extremes in Hairgrass
	Luo, Qiaoyu; Ma, Yonggui; Xie, Huichun; Chang, Feifei; Guan, Chiming; Yang, Bing; Ma, Yushou
发表日期	2024
ISSN	2223-7747
起始页码	13
结束页码	10
卷号	13 期号:10
英文摘要	Hairgrass (Deschampsia caespitosa), a widely distributed grass species considered promising in the ecological restoration of degraded grassland in the Qinghai-Xizang Plateau, is likely to be subjected to frequent drought and waterlogging stress due to ongoing climate change, further aggravating the degradation of grassland in this region. However, whether it would acclimate to water stresses resulting from extreme climates remains unknown. Proline accumulation is a crucial metabolic response of plants to challenging environmental conditions. This study aims to investigate the changes in proline accumulation and key enzymes in hairgrass shoot and root tissues in response to distinct climate extremes including moderate drought, moderate waterlogging, and dry-wet variations over 28 days using a completely randomized block design. The proline accumulation, contribution of the glutamate and ornithine pathways, and key enzyme activities related to proline metabolism in shoot and root tissues were examined. The results showed that water stress led to proline accumulation in both shoot and root tissues of hairgrass, highlighting the importance of this osmoprotectant in mitigating the effects of environmental challenges. The differential accumulation of proline in shoots compared to roots suggests a strategic allocation of resources by the plant to cope with osmotic stress. Enzymatic activities related to proline metabolism, such as Delta(1)-pyrroline-5-carboxylate synthetase, ornithine aminotransferase, Delta(1)-pyrroline-5-carboxylate reductase, Delta(1)-pyrroline-5-carboxylate dehydrogenase, and proline dehydrogenase, further emphasize the dynamic regulation of proline levels in hairgrass under water stress conditions. These findings support the potential for enhancing the stress resistance of hairgrass through the genetic manipulation of proline biosynthesis and catabolism pathways.
英文关键词	Deschampsia caespitosa; proline; glutamate; ornithine; proline metabolism-related enzyme; dry-wet alternation
语种	英语
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:001231585400001
来源期刊	PLANTS-BASEL
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/300404
作者单位	Qinghai Normal University; Qinghai Normal University; Qinghai Normal University; Qinghai University
推荐引用方式 GB/T 7714	Luo, Qiaoyu,Ma, Yonggui,Xie, Huichun,et al. Proline Metabolism in Response to Climate Extremes in Hairgrass[J],2024,13(10).
APA	Luo, Qiaoyu.,Ma, Yonggui.,Xie, Huichun.,Chang, Feifei.,Guan, Chiming.,...&Ma, Yushou.(2024).Proline Metabolism in Response to Climate Extremes in Hairgrass.PLANTS-BASEL,13(10).
MLA	Luo, Qiaoyu,et al."Proline Metabolism in Response to Climate Extremes in Hairgrass".PLANTS-BASEL 13.10(2024).