Polyploidy and zinc oxide nanoparticles alleviated Cd toxicity in rice by modulating oxidative stress and expression levels of sucrose and metal-transporter genes

多倍体 氧化应激 毒性 倍性 生物 蔗糖 开枪 活性氧 植物 化学 食品科学 生物化学 基因 有机化学
作者
Fozia Ghouri,Munazzam Jawad Shahid,Jing Wang,Mingyu Lai,Lixia Sun,Jinwen Wu,Xiangdong Liu,Shafaqat Ali,Muhammad Qasim Shahid
出处
期刊:Journal of Hazardous Materials [Elsevier]
卷期号:448: 130991-130991 被引量:47
标识
DOI:10.1016/j.jhazmat.2023.130991
摘要

The Cd toxicity causes severe perturbations to the plant’s growth and development. Here, polyploid and diploid rice lines were treated with zinc-oxide nanoparticles (ZnO-NPs) and Cd, and physiological, cytological and molecular changes were observed. The Cd toxicity significantly reduced plant's growth attributes (such as shoot length, biological yield, dry matter, and chlorophyll contents, which decreased by 19%, 18%, 16%, 19% in polyploid and 35%, 43%, 45% and 43% in diploid rice, respectively), and disturbed the sugar level through the production of electrolytes, hydrogen peroxide, and malondialdehyde. The application of ZnO-NPs significantly alleviated the Cd toxicity in both lines by improving the antioxidant enzymes activities and physiochemical attributes. Semi-thin sections and transmission electron microscope revealed more and different types of abnormalities in diploid rice compared to polyploid rice under Cd stress. Moreover, RNA-seq analysis identified several differentially expressed genes between polyploid and diploid rice, especially metal and sucrose transporter genes. The GO, COG, and KEGG analyses revealed ploidy-specific pathways associated with plant growth and development. In conclusion, ZnO-NPs application to both rice lines significantly improved plant growth and decreased Cd accumulation in plants. We inferred that polyploid rice is more resistant to Cd stress than diploid rice.
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