气候变化领域集成服务门户(CCPortal): Proline accumulation and antioxidant response are crucial for citrus tolerance to UV-B light-induced stress

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DOI	10.1111/plb.13640
	Proline accumulation and antioxidant response are crucial for citrus tolerance to UV-B light-induced stress
	Vives-Peris, V.; Gomez-Cadenas, A.; Perez-Clemente, R. M.
发表日期	2024
ISSN	1435-8603
EISSN	1438-8677
起始页码	26
结束页码	4
卷号	26 期号:4
英文摘要	Plants face a wide range of biotic and abiotic stress conditions, which are further intensified by climate change. Among these stressors, increased irradiation in terms of intensity and wavelength range can lead to detrimental effects, such as chlorophyll degradation, destruction of the PSII reaction center, generation of ROS, alterations to plant metabolism, and even plant death. Here, we investigated the responses of two citrus genotypes, Citrus macrophylla (CM), and Troyer citrange (TC) to UV-B light-induced stress, by growing plants of both genotypes under control and UV-B stress conditions for 5 days to evaluate their tolerance mechanisms. TC seedlings had higher sensitivity to UV-B light than CM seedlings, as they showed more damage and increased levels of oxidative harm (indicated by the accumulation of MDA). In contrast, CM seedlings exhibited specific adaptive mechanisms, including accumulation of higher levels of proline under stressful conditions, and enhanced antioxidant capacity, as evidenced by increased ascorbate peroxidase activity and upregulation of the CsAPX2 gene. Phytohormone accumulation patterns were similar in both genotypes, with a decrease in ABA content in response to UV-B light. Furthermore, expression of genes involved in light perception and response was specifically affected in the tolerant CM seedlings, which exhibited higher expression of CsHYH/CsHY5 and CsRUP1-2 genes. These findings underscore the importance of the antioxidant system in citrus plants subjected to UV-B light-induced stress and suggest that CsHYH/CsHY5 and CsRUP1-2 could be considered genes associated with tolerance to such challenging conditions. Two citrus genotypes were exposed to UV-B stress, highlighting the biochemical and molecular mechanisms influencing their differing tolerance, primarily through proline accumulation and increased ascorbate peroxidase activity. image
英文关键词	Abscisic acid; antioxidant enzymes; ascorbate peroxidase; light stress; phytohormones; ultraviolet light
语种	英语
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:001196046100001
来源期刊	PLANT BIOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/303425
作者单位	Universitat Jaume I; Universitat Jaume I
推荐引用方式 GB/T 7714	Vives-Peris, V.,Gomez-Cadenas, A.,Perez-Clemente, R. M.. Proline accumulation and antioxidant response are crucial for citrus tolerance to UV-B light-induced stress[J],2024,26(4).
APA	Vives-Peris, V.,Gomez-Cadenas, A.,&Perez-Clemente, R. M..(2024).Proline accumulation and antioxidant response are crucial for citrus tolerance to UV-B light-induced stress.PLANT BIOLOGY,26(4).
MLA	Vives-Peris, V.,et al."Proline accumulation and antioxidant response are crucial for citrus tolerance to UV-B light-induced stress".PLANT BIOLOGY 26.4(2024).