Glutathione treatment suppresses the adverse effects of microplastics in rice. (May 2023)

• Record Type: Journal Article
• Authors: Chen, Fu; Aqeel, Muhammad; Khalid, Noreen; Irshad, Muhammad Kashif; Farhat, Fozia; Nazir, Atia; Ma, Jing; Akhtar, Muhammad Saeed; Eldesoky, Gaber E.; Aljuwayid, Ahmed Muteb; Noman, Ali
• Is Part Of: Chemosphere. Volume 322(2023)
• Publication Date: 2023-05
• Subjects: Rice -- Antioxidants -- Microplastics -- Metabolism -- Soil; MP Microplastic -- GSH Glutathione -- PS Polystyrene -- PTFE Polytetrafluoroethylene -- PVC Polyvinyl chloride -- GS Glutathione sulfate -- HDPE High density polyethylene -- PET Polyethylene terephthalate -- PH Plant Height -- SFW Shoot Fresh weight -- SDW Shoot Dry weight -- RFW Root Fresh weight -- RDW Root Dry weight -- A Photosynthetic Rate -- E Transpiration Rate -- WUE Water Use Efficiency -- iCO2 Internal CO2 concentration -- Gs Stomatal Conductance -- Chla Chlorophyll-a -- Chlb Chlorophyll-b -- Chl_T Total Chlorophyll -- SP Soluble Proteins -- TFAA Total Free Amino Acids -- R_Ca Root Calcium -- S_Ca Shoot Calcium -- R_K Root Potassium -- S_K Shoot Potassium -- R_P Root Phosphorus -- S_P Shoot Phosphorus -- GSSH oxidized glutathione -- ASA Ascorbic acid; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2023.138079
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: Oryza sativa is grown worldwide and exhibit sensitivity to different stresses. Exponential increase in microplastics in agroecosystems is damaging and demand pragmatic strategies to protect growth and yield losses. We evaluated exogenous application of different doses of glutathione (GSH) for mediation of physiological traits of rice plants experiencing two different MPs i.e. PET and HDPE in root zone. All the rice seedlings exhibited MP-induced significant (P ≤ 0.001) growth inhibition compared to the control plants. GSH application (T3 ) significantly increased the shoot fresh weight (8.80%), root fresh weight (19.22%), shoot dry weight (13.705%), root dry weight (25.52%), plant height (5.75%) and 100-grain weight (9.36%), compared to control plants. GSH treated plants (T4 ) showed a recovery mechanism by managing the marginal rate of reduction of all photosynthetic and gas exchange attributes by showing 34.44, 20.98, 34.83, 42.16, 39.70, and 51.38% reduction for Chl-a, Chl-b, total cholophyll, photosynthetic rate (A), transpiration rate (E), and stomatal conductance (Gs), respectively, compared to control plants. Under 5 mg L −1 HDPE and PET, rice seedlings without GSH treatment responded in terms of increase in total soluble sugar, total free amino acid, glutathione, glutathione disulfide contents, while total soluble protein and ascorbic acid contents decreased significantly, compared with control plants. Corrleation matrix revealed positive relationship between GSH and improvement in studied attributes. Moreover, exogenous GSH improved rice growth and productivity to counter the negative role of MPs. This unique study examined the effects of GSH on rice plants growing in MP-contaminated media and revealed how exogenous GSH helps plants survive MP-stress. Graphical abstract: Image 1 Highlights: MPs in agroecosystems particularly demand pragmatic strategies to minimize hazards. Cost-effective methods are needed to enhance rice production in pressured conditions. PET and HDPE MPs affected the growth and metabolism of rice plants. Glutathione regulates plant metabolism in harsh environments. Exogenous glutathione supply improved plant growth in MP contaminated soil.