Melatonin enhances metal oxide nanoparticles tolerance in rice seedlings through dual regulation of antioxidant defense and photosynthetic efficiency

被引：0

作者：

Gharib, Ahmed ^{[1
,2
,3
]}

Su, Yanze ^{[1
,2
]}

Zuo, Zhihao ^{[1
,2
]}

Chen, Rujia ^{[1
,2
]}

Wang, Hanyao ^{[1
,2
]}

Tao, Tianyun ^{[1
,2
]}

Chuan, Mingli ^{[1
,2
]}

Bu, Qing ^{[1
,2
]}

Luo, Yanmo ^{[1
,2
]}

Li, Yaoqing ^{[1
,2
]}

Wang, Shuting ^{[1
,2
]}

Hua, Yu ^{[1
,2
]}

Ji, Yi ^{[1
,2
]}

Ding, Jianheng ^{[1
,2
]}

Liu, Wei ^{[4
]}

He, Shuihua ^{[4
]}

Li, Pengcheng ^{[1
,2
]}

Xu, Yang ^{[1
,2
]}

Xu, Chenwu ^{[1
,2
]}

Lu, Yue ^{[1
,2
]}

Yang, Zefeng ^{[1
,2
]}

机构：

[1] Yangzhou Univ, Jiangsu Key Lab Crop Genom & Mol Breeding, Zhongshan Biol Breeding Lab, Key Lab Plant Funct Genom,Minist Educ,Agr Coll, Yangzhou, Peoples R China

[2] Yangzhou Univ, Jiangsu Coinnovat Ctr Modern Prod Technol Grain Cr, Jiangsu Key Lab Crop Genet & Physiol, Yangzhou, Peoples R China

[3] Cairo Univ, Natl Inst Laser Enhanced Sci NILES, Giza, Egypt

[4] China Reclamat Seed Ind Co LTD, Shanghai, Peoples R China

来源：

PHYSIOLOGIA PLANTARUM | 2024年 / 176卷 / 06期

基金：

中国国家自然科学基金;

关键词：

STRESS TOLERANCE; SALT STRESS;

D O I：

10.1111/ppl.70020

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The growing utilization of metal oxide nanoparticles (MONPs) presents novel and potential hazards to plants. However, the impacts of MONPs on plants and the mechanisms underlying their tolerance to MONPs remain unclear. In this study, we demonstrated that both CuO and ZnO nanoparticles hindered plant growth and triggered oxidative damage in rice seedlings. The role of melatonin in rice tolerance to MONPs was elucidated through a comprehensive analysis of OsCOMT mutant and overexpression plants, which showed melatonin deficiency and sufficiency, respectively. Our results revealed that the melatonin-deficient OsCOMT mutant plants exhibited hypersensitivity to MONPs, while the melatonin-sufficient OsCOMT overexpression plants showed enhanced MONPs tolerance. Physiological assessments further indicated that melatonin counteracted rice oxidative damage triggered by MONPs by increasing the activities of antioxidative enzymes, including superoxide dismutase, peroxidase, catalase, and glutathione reductase. Moreover, melatonin was found to foster rice growth under MONP stress by positively regulating the maximum photochemical efficiency, reducing non-photochemical fluorescence quenching, and promoting the biosynthesis of sucrose and starch. These findings not only highlight the hazardous effects of MONPs on plants, but also underscore the pivotal role of melatonin in bolstering plant resilience against MONPs.

引用

页数：13

共 31 条

[31] Potassium and melatonin-mediated regulation of fructose-1,6-bisphosphatase (FBPase) and sedoheptulose-1,7-bisphosphatase (SBPase) activity improve photosynthetic efficiency, carbon assimilation and modulate glyoxalase system accompanying tolerance to cadmium stress in tomato seedlings
Siddiqui, Manzer H.
Mukherjee, Soumya
Kumar, Ritesh
Alansi, Saleh
Shah, Anis Ali
Kalaji, Hazem M.
Javed, Talha
Raza, Ali
PLANT PHYSIOLOGY AND BIOCHEMISTRY, 2022, 171 : 49 - 65

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