期刊
MOLECULES
卷 26, 期 8, 页码 -出版社
MDPI
DOI: 10.3390/molecules26082196
关键词
zinc oxide nanoparticles; chilling stress; rice; chilling response; antioxidative system
资金
- Natural Foundation of Anhui Province [1908085QC103]
- Open Project Program of State Key Laboratory of Rice Biology [20200104]
- Anhui Agricultural University [yj2018-39]
- Postdoctoral Science Foundation of Zhejiang Province [ZJ2020157]
- China Postdoctoral Science Foundation [2020M680078]
Foliar application of ZnO nanoparticles significantly alleviated chilling stress in rice seedlings by restoring chlorophyll accumulation, ameliorating chilling-induced oxidative stress and enhancing antioxidative enzyme activities.
As one of the common abiotic stresses, chilling stress has negative effects on rice growth and development. Minimization of these adverse effects through various ways is vital for the productivity of rice. Nanoparticles (NPs) serve as one of the effective alleviation methods against abiotic stresses. In our research, zinc oxide (ZnO) NPs were utilized as foliar sprays on rice leaves to explore the mechanism underlying the effect of NPs against the negative impact of chilling stress on rice seedlings. We revealed that foliar application of ZnO NPs significantly alleviated chilling stress in hydroponically grown rice seedlings, including improved plant height, root length, and dry biomass. Besides, ZnO NPs also restored chlorophyll accumulation and significantly ameliorated chilling-induced oxidative stress with reduced levels of H2O2, MDA, proline, and increased activities of major antioxidative enzymes, superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD). We further found that foliar application of ZnO NPs induced the chilling-induced gene expression of the antioxidative system (OsCu/ZnSOD1, OsCu/ZnSOD2, OsCu/ZnSOD3, OsPRX11, OsPRX65, OsPRX89, OsCATA, and OsCATB) and chilling response transcription factors (OsbZIP52, OsMYB4, OsMYB30, OsNAC5, OsWRKY76, and OsWRKY94) in leaves of chilling-treated seedlings. Taken together, our results suggest that foliar application of ZnO NPs could alleviate chilling stress in rice via the mediation of the antioxidative system and chilling response transcription factors.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据