CeO
10.13865/j.cnki.cjbmb.2023.05.1006
- Author:
Jue-Wen LIU
1
;
Yan-Hui LI
1
;
Tian-Xu YANG
1
;
Jie QI
1
;
Lin-Lin CHEN
1
;
Hong-Hong WU
1
;
Lin-Lin CHEN
2
;
Hong-Hong WU
2
Author Information
1. MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, The Center of Crop Nanobiotechnology, Department of Agronomy, College of Plant Science and Technology, Huazhong Agricultural University
2. Hubei Hongshan Laboratory
- Publication Type:Journal Article
- Keywords:
cerium oxide nanoparticles;
drought stress;
nitric oxide (NO);
reactive oxygen species (ROS);
rice
- From:
Chinese Journal of Biochemistry and Molecular Biology
2023;39(7):991-999
- CountryChina
- Language:Chinese
-
Abstract:
Drought is a common limiting factor affecting rice yield and quality. Cerium oxide nanoparticles(nanoceria) have been widely reported to improve crop stress tolerance. However, the effects and mechanisms of nanoceria on rice drought tolerance are still unknown. The aim of this study is to investigate whether nanoceria can improve rice drought tolerance by modulating reactive oxygen species(ROS) homeostasis and nitric oxide(NO) levels. Our results showed that compared with no-nanoparticle treatment, nanoceria significantly increased the fresh weight of rice seedlings under drought stress(19%, P < 0. 05). Also, under drought stress, the ROS level of rice leaves treated with nanoceria was significantly lower(82%, P < 0. 05) than leaves treated with buffer. The leaf NO level after nanoceria treatment, however, is significantly higher(46%, P < 0. 05) than that with no-nanoparticle treatment under drought stress. Moreover, compared with control plants, nanoceria maintained better membrane integrity in rice leaf cells under drought stress, showing a 70% decrease(P < 0. 05) in dead leaf cells. This study explores the mechanisms underlying nanoceria’s improved rice drought tolerance by affecting ROS and NO levels, which not only further enriches our knowledge about the interaction between nanoparticles and crops under abiotic stress but also gives more support on the sustainable development of nano-enabled agriculture.
