Insights into 28-homobrassinolide (HBR)-mediated redox homeostasis, AsA-GSH cycle, and methylglyoxal detoxification in soybean under drought-induced oxidative stress

被引：44
作者：
Hasan, Md. Mahadi [1 ]
Ali, Md. Arfan [2 ]
Soliman, Mona H. [3 ]
Alqarawi, Abdulaziz A. [4 ]
Abd Allah, Elsayed Fathi [4 ]
Fang, Xiang-Wen [1 ]
机构：
[1] Lanzhou Univ, Sch Life Sci, State Key Lab Grassland Agroecosyst, Lanzhou 730000, Peoples R China
[2] Sher E Bangla Agr Univ, Dept Hort, Fac Agr, Dhaka, Bangladesh
[3] Cairo Univ, Fac Sci, Bot & Microbiol Dept, Giza, Egypt
[4] King Saud Univ, Coll Food & Agr Sci, Plant Prod Dept, Riyadh, Saudi Arabia
来源：
JOURNAL OF PLANT INTERACTIONS | 2020年 / 15卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Glycine max; 28-homobrassinolide (HBR); reactive oxygen species (ROS); proline; drought stress; H2O2; content; ASCORBATE-GLUTATHIONE CYCLE; SALT STRESS; ANTIOXIDANT RESPONSES; LIPID-PEROXIDATION; INDUCED INHIBITION; HYDROGEN-PEROXIDE; MAGNETIZED WATER; CADMIUM TOXICITY; BRASSICA-JUNCEA; BEAN-PLANTS;
D O I：
10.1080/17429145.2020.1832267
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
Brassinosteroids (BRs) are well recognized for their defensive role in plants under abiotic stress conditions, but 28-homobrassinolide (HBR)-induced tolerance to drought stress has not been reported in soybean (Glycine maxL.). The present study investigated the effect of HBR on soybean seedlings under drought stress. Drought stress suppressed growth and photosynthetic systems while increased the proline, glycine betaine (GB), anthocyanin, total phenolic (TP), and total flavonoid (TF) levels in soybean seedlings. HBR restricted reactive oxygen species (ROS) accumulation and decreased the hydrogen peroxide (H2O2) and malondialdehyde (MDA) content by triggering the antioxidant systems. HBR acts as a shield in soybean, protecting the plant against the harmful effects of methylglyoxal (MG) effects by upregulating the enzymes glyoxalase I, (Gly I;15%) and glyoxalase II (Gly II;29.1%) compared to the levels in drought stressed seedlings. Overall, HBR improved drought tolerance in soybean seedlings by modulating osmolytes, the AsA-GSH cycle, and enzyme activities. [GRAPHICS] .
引用
收藏
页码：371 / 385
页数：15
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