气候变化领域集成服务门户(CCPortal): Photoprotective mechanisms and higher photorespiration are key points for iron stress tolerance under heatwaves in rice

CCPortal

DOI	10.1016/j.plantsci.2024.112031
	Photoprotective mechanisms and higher photorespiration are key points for iron stress tolerance under heatwaves in rice
	de Souza, Moises Alves; de Andrade, Lissa Izabel Ferreira; Gago, Jorge; Pereira, Eduardo Gusmao
发表日期	2024
ISSN	0168-9452
EISSN	1873-2259
起始页码	342
卷号	342
英文摘要	Considering the current climate change scenario, the development of heat-tolerant rice cultivars (Oryza sativa L.) is paramount for cultivation in waterlogged systems affected by iron (Fe) excess. The objective of this work was to investigate the physiological basis of tolerance to excess Fe in rice cultivars that would maintain photosynthetic efficiency at higher temperatures. In an experimental approach, two rice cultivars (IRGA424 - tolerant and IRGA417- susceptible to Fe toxicity) were exposed to two concentrations of FeSO4-EDTA, control (0.019 mM) and excess Fe (7 mM) and subsequent exposition to heatwaves at different temperatures (25degree celsius - control, 35, 40, 45, 50, and 55 degree celsius). The increase in temperatures resulted in a higher Fe concentration in shoots accompanied by a lower Rubisco carboxylation rate in both cultivars, but with lower damage in the tolerant one. Stomatal limitation only occurred as a late response to Fe toxicity, especially in the sensitive cultivar. The activation of photorespiration as electron sink under Fe excess with increasing temperature during heatwaves appear as a major mechanism to alleviate oxidative stress in cultivars tolerant to excess Fe. The tolerance to iron toxicity and heat stress is associated with increased photoprotective mechanisms driving non-photochemical dissipation.
英文关键词	Oryza sativa; Iron toxicity; Heat tolerance; Photosynthesis; Photoprotection
语种	英语
WOS研究方向	Biochemistry & Molecular Biology ; Plant Sciences
WOS类目	Biochemistry & Molecular Biology ; Plant Sciences
WOS记录号	WOS:001197155400001
来源期刊	PLANT SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/295903
作者单位	Universidade Federal de Lavras; Universitat de les Illes Balears; Universidade Federal de Vicosa
推荐引用方式 GB/T 7714	de Souza, Moises Alves,de Andrade, Lissa Izabel Ferreira,Gago, Jorge,et al. Photoprotective mechanisms and higher photorespiration are key points for iron stress tolerance under heatwaves in rice[J],2024,342.
APA	de Souza, Moises Alves,de Andrade, Lissa Izabel Ferreira,Gago, Jorge,&Pereira, Eduardo Gusmao.(2024).Photoprotective mechanisms and higher photorespiration are key points for iron stress tolerance under heatwaves in rice.PLANT SCIENCE,342.
MLA	de Souza, Moises Alves,et al."Photoprotective mechanisms and higher photorespiration are key points for iron stress tolerance under heatwaves in rice".PLANT SCIENCE 342(2024).