ZnO nanoparticle-based seed priming modulates early growth and enhances physio-biochemical and metabolic profiles of fragrant rice against cadmium toxicity
文献类型： 外文期刊
作者： Li, Yuzhan 1 ; Liang, Luxin 1 ; Li, Wu 2 ; Ashraf, Umair 3 ; Ma, Lin 1 ; Tang, Xiangru 1 ; Pan, Shenggang 1 ; Tian, Hua 1 ;
作者机构： 1.South China Agr Univ, Coll Agr, State Key Lab Conservat & Utilizat Subtrop Agrobi, Guangzhou 510642, Peoples R China
2.Guangdong Acad Agr Sci, Crop Res Inst, Guangdong Prov Key Lab Crop Genet Improvement, Guangzhou 510640, Guangdong, Peoples R China
3.Univ Educ, Div Sci & Technol, Dept Bot, Lahore 54770, Punjab, Pakistan
4.Minist Agr & Rural Affairs, Sci Observing & Expt Stn Crop Cultivat South Chin, Guangzhou 510642, Peoples R China
关键词： ZnO NPs; Cd; plant growth; physiological response; metabolomics
期刊名称：JOURNAL OF NANOBIOTECHNOLOGY （ 影响因子：6.518； 五年影响因子：6.377 ）
ISSN：
年卷期： 2021 年 19 卷 1 期
页码：
收录情况： SCI
摘要： Background: Cadmium (Cd) is amongst the most toxic heavy metals that severely affects crop growth, whereas application of nanoparticles (NPs) to negate the toxic effects of heavy metals could be an effective management approach. In the present study, the seeds of two fragrant rice varieties i.e., Yuxiangyouzhan and Xiangyaxiangzhan under normal and Cd stress conditions i.e., 0 and 100 mg L-1 applied with four levels of ZnO NPs i.e., 0, 25, 50, and 100 mg L-1. Results: Seed priming with ZnO NPs had no significant effect on the seed germination (p> 0.05) however, it substantially improved the seedling growth and other related physiological attributes under the Cd stress. The mean fresh weight of the shoot, and whole seedling was increased by 16.92-27.88% and by 16.92-27.88% after ZnO NPs application. The root fresh weight, root-shoot length was also substantially improved under ZnO NPs treatment. Moreover, application of ZnO NPs induced modulations in physiological and biochemical attributes e.g., the superoxide dismutase (SOD) activity in root and shoot, the peroxidase (POD) activity and metallothionein contents in root were increased under low levels of ZnO NPs. The a-amylase and total amylase activity were improved by ZnO NPs application under Cd Stress. Besides, modulation in Zn concentration and ZnO NPs uptake in the seedling were detected. The metabolomic analysis indicated that various pathways such as alanine, aspartate and glutamate metabolism, phenylpropanoid biosynthesis, and taurine and hypotaurine metabolism were possibly important for rice response to ZnO NPs and Cd. Conclusion: Overall, application of ZnO NPs substantially improved the early growth and related physio-biochemical attributes in rice. Our findings provide new insights regarding the effects of ZnO NPs on seed germination, and early growth of rice, and its potential applications in developing crop resilience against Cd contaminated soils.
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