水杨酸
胡椒粉
化学
褪黑素
丙二醛
脯氨酸
砷
毒性
砷毒性
硝酸还原酶
生物化学
谷氨酰胺合成酶
新陈代谢
亚硝酸盐
谷氨酰胺
食品科学
园艺
硝酸盐
氧化应激
生物
酶
氨基酸
内分泌学
有机化学
作者
Cengiz Kaya,Ali Sarıoğlu,Muhammad Ashraf,Mohammed Nasser Alyemeni,Parvaiz Ahmad
标识
DOI:10.1016/j.envpol.2021.118727
摘要
The main objective of the study was to assess if joint application of melatonin (MT, 0.1 mM) and salicylic acid (SA 0.5 mM) could improve tolerance of pepper plants to arsenic (As) as sodium hydrogen arsenate heptahydrate (0.05 mM). The imposition of arsenic stress led to accumulation of As in roots and leaves, and increased contents of leaf proline, phytochelatins, malondialdehyde (MDA) and H2O2, but it reduced plant biomass, chlorophylls (Chl), PSII maximum efficiency (Fv/Fm) and leaf water potential. Melatonin and SA applied jointly or alone enhanced nitrogen metabolism by triggering the activities of glutamate synthase, glutamine synthetase, and nitrite reductases and nitrate. In comparison with a single treatment of MT or SA, the joint treatment of MT and SA had better impact on enhancing growth and key biological events and decreasing tissue As content. This clearly shows a cooperative function of both agents in enhancing tolerance to As-toxicity in pepper plants.
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