Genetic and epigenetic mechanisms underlying cadmium (Cd) stress responses in soybean cultivars.
Ali S, Huang Y, Khan R, Khan K, Chi YX
Summary
PubMedResearchers identified soybean varieties naturally resistant to cadmium contamination and discovered the genetic mechanisms enabling this tolerance. This breakthrough could lead to safer soybean crops by selectively breeding for cadmium-resistant varieties that maintain better health under soil contamination.
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Key Findings
25 soybean germplasms screened under 20 µM cadmium stress; ZH35 and ND257 identified as most tolerant cultivars while MRidge and JXD were most susceptible
Isoflavonoid biosynthesis and gene-specific DNA methylation are the key epigenetic mechanisms underlying cadmium tolerance in soybean
Tolerant cultivars maintained superior antioxidant defense systems while susceptible varieties accumulated higher levels of oxidative damage (hydrogen peroxide)
Original Abstract
Multi-omics analysis reveals that isofl avonoid biosynthesis and gene-specifi c DNA methylation are key mechanisms underlying cadmiumtolerance in soybean. Cadmium (Cd) contamination poses a significant threat to crop productivity and food safety. Yet, the genetic and epigenetic mechanisms of Cd tolerance in soybean remain unclear. This study investigated the physiological, molecular, and epigenetic responses of 25 soybean germplasms grown hydroponically under Cd stress (20 µM). Tolerance coefficients and variability analyses revealed distinct responses among cultivars. Principal component and cluster analyses classified the germplasms into five groups, with ZH35 and ND257 identified as the most tolerant, while MRidge and JXD were the most susceptible cultivars. Tolerant lines maintained better growth and antioxidant defense, whereas susceptible cultivars accumulated higher levels of oxidative damage (hydrogen peroxide-H
This connects to 10 other discoveries — 1 species, 4 topics, 5 related articles
Species Mentioned
The soybean, soy bean, or soya bean is a species of legume native to East Asia, widely grown for its edible bean. Soy is a staple crop, the world's most grown legume, and an important animal feed.
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