Response of rice genotypes with differential nitrate reductase- dependent NO synthesis to melatonin under ZnO nanoparticles' (NPs) stress
文献类型： 外文期刊
作者： Huang, Zhuoli 1 ; Xie, Wenjun 1 ; Wang, Meng 1 ; Liu, Xuwei 1 ; Ashraf, Umair 3 ; Qin, Dejun 4 ; Zhuang, Maosen 5 ; Li, W 1 ;
作者机构： 1.South China Agr Univ, Coll Agr, Guangzhou 510642, Guangdong, Peoples R China
2.Minist Agr, Sci Observing & Expt Stn Crop Cultivat South Chin, Guangzhou 510642, Guangdong, Peoples R China
3.Univ Educ, Dept Bot, Div Sci & Technol, Lahore 54770, Punjab, Pakistan
4.Guangdong Seed Assoc, Guangzhou 510000, Guangdong, Peoples R China
5.BASF China Co Ltd, Guangzhou Branch, Guangzhou 510095, Guangdong, Peoples R China
6.Guangdong Acad Agr Sci, Crop Res Inst, Guangdong Prov Key Lab Crop Genet Improvement, Guangzhou 510640, Guangdong, Peoples R China
7.Ibaraki Univ, Ctr Int Field Agr Res & Educ, Ami, Ibaraki 3000393, Japan
关键词： Antioxidants; Growth; Melatonin; Micro-nutrients; Rice; ZnO NPs
期刊名称：CHEMOSPHERE （ 影响因子：7.086； 五年影响因子：6.956 ）
ISSN： 0045-6535
年卷期： 2020 年 250 卷
页码：
收录情况： SCI
摘要： Nitrate reductase is a nitric oxide (NO) induced enzyme in plants, NO acts as a signaling molecule under ZnO NPs-induced stress whereas melatonin (N-acetyl-5-methoxytryptamine) could improve morphophysiological attributes of plants under adverse conditions. In present study, seedlings of two rice genotypes differed regarding nitrate reductase activities i.e., transgenic 'NR' and wild type 'WT' were applied with two melatonin levels i.e., 0, 10 tM regarded as MO, M10, respectively and three levels of ZnO NPs i.e., 0, 50, 500 mg L-1 regarded as ZnO NPs0, ZnO NPs50 and ZnO NPs500, respectively. Results revealed that melatonin application substantially increased the dry biomass accumulation of both rice genotypes under all ZnO NPs levels. The root growth, mineral absorption as well as the antioxidant responses were also improved by melatonin application under ZnO NPs stress. The interactive effects of melatonin and genotype on plant growth, antioxidant responses and mineral contents i.e., Zn, Na, Fe and Mn were also found significant under different ZnO NPs stress. Furthermore, total plant dry weight was significantly correlated with the leaf dry weight, root volume, catalase (CAT) activity in leaves, Na accumulation in stem sheath and Fe accumulation in root under both MO and M10 treatments. Moreover, the comparative transcriptome analysis identified key genes which were responsible for melatonin and NO-induced modulations in plant growth under ZnO NPs stress. Overall, melatonin could improve the morphological growth of the rice plants by modulating root-shoot characteristics, antioxidant activities and mineral uptake in root and shoot of rice. (C) 2020 Elsevier Ltd. All rights reserved.
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