Both hormones and energy-rich compounds play a role in the mitigation of elevated pH on aluminum toxicity in Citrus sinensis leaves.

Autor: Wu BS; College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China; Fujian Provincial Key Laboratory of Ecology-Toxicological Effects & Control for Emerging Contaminants/Key Laboratory of Ecological Environment and Information Atlas, Fujian Provincial University, College of Environmental and Biological Engineering, Putian University, Putian 351100, China. Electronic address: 418446561@qq.com., Chen XF; College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China. Electronic address: 997037082@qq.com., Rao RY; College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China. Electronic address: raorongyu00@163.com., Hua D; College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China. Electronic address: 1209017428@qq.com., Huang WL; College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China. Electronic address: 1527204185@qq.com., Chen WS; College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China. Electronic address: 1695830571@qq.com., Yang LT; College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China. Electronic address: talstoy@163.com., Huang ZR; College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China. Electronic address: hzrapaul@126.com., Ye X; College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China. Electronic address: yexin1000@163.com., Wu J; Fujian Provincial Key Laboratory of Ecology-Toxicological Effects & Control for Emerging Contaminants/Key Laboratory of Ecological Environment and Information Atlas, Fujian Provincial University, College of Environmental and Biological Engineering, Putian University, Putian 351100, China. Electronic address: wjc2384@163.com., Chen LS; College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China. Electronic address: lisongchen2002@hotmail.com.
Jazyk: angličtina
Zdroj: Ecotoxicology and environmental safety [Ecotoxicol Environ Saf] 2024 Sep 15; Vol. 283, pp. 116975. Date of Electronic Publication: 2024 Aug 30.
DOI: 10.1016/j.ecoenv.2024.116975
Abstrakt: The contribution of plant hormones and energy-rich compounds and their metabolites (ECMs) in alleviating aluminum (Al) toxicity by elevated pH remains to be clarified. For the first time, a targeted metabolome was applied to identify Al-pH-interaction-responsive hormones and ECMs in Citrus sinensis leaves. More Al-toxicity-responsive hormones and ECMs were identified at pH 4.0 [4 (10) upregulated and 7 (17) downregulated hormones (ECMs)] than those at pH 3.0 [1 (9) upregulated and 4 (14) downregulated hormones (ECMs)], suggesting that the elevated pH improved the adaptation of hormones and ECMs to Al toxicity in leaves. The roles of hormones and ECMs in reducing leaf Al toxicity mediated by elevated pH might include the following aspects: (a) improved leaf growth by upregulating the levels of jasmonoyl-L-isoleucine (JA-ILE), 6-benzyladenosine (BAPR), N6-isopentenyladenosine (IPR), cis-zeatin-O-glucoside riboside (cZROG), and auxins (AUXs), preventing Al toxicity-induced reduction of gibberellin (GA) biosynthesis, and avoiding jasmonic acid (JA)-mediated defense; (b) enhanced biosynthesis and accumulation of tryptophan (TRP), as well as the resulting increase in biosynthesis of auxin, melatonin and secondary metabolites (SMs); (c) improved ability to maintain the homeostasis of ATP and other phosphorus (P)-containing ECMs; and (d) enhanced internal detoxification of Al due to increased organic acid (OA) and SM accumulation and elevated ability to detoxify reactive oxygen species (ROS) due to enhanced SM accumulation. To conclude, the current results corroborate the hypotheses that elevated pH reduces Al toxicity by upregulating the ability to maintain the homeostasis of ATP and other P-containing ECMs in leaves under Al toxicity and (b) hormones participate in the elevated pH-mediated alleviation of Al toxicity by positively regulating growth, the ability to detoxify ROS, and the internal detoxification of Al in leaves under Al toxicity. Our findings provide novel insights into the roles of hormones and ECMs in mitigating Al toxicity mediated by the elevated pH.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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