Effects of exogenous catechins on sorghum seed germination under salt stress
Catechins are a kind of polyphenolic compounds,which can be used as indirect antioxidants to promote the growth and development of plants under stress and reduce the damage caused by stress.Sorghum is the fifth largest cereal crop in the world,and its growth and development are seriously affected by salt stress.In order to explore the effects of catechins on the growth and development of sorghum seedlings under salt stress,this study took Sorghum'Henong 16'varieties as experimental materials,and measured the germination and morphological characteristics of sorghum seeds under non-salt stress and salt stress(100 mmol/L NaCl)with catechin leaching treatment(50 µmol/L catechin).The results showed that catechin treatment significantly increased the bud length,root length,superoxide dismutase activity,proline,soluble sugar and chlorophyll contents of sorghum seedlings under salt stress,and significantly decreased the activities of peroxidase,catalase and malondialdehyde.Further correlation analysis showed positively correlation of catechin treatment with bud length,root length,bud fresh weight,bud dry weight,root fresh weight,root dry weight,superoxide dismutase,proline,soluble sugar,chlorophyll a,chlorophyll b and total chlorophyll,but negative correlation with peroxidase,catalase activity and malondialdehyde content.According to comprehensive analysis,exogenous catechins can alleviate the damage caused by salt stress on sorghum seedlings,promote dry matter accumulation,and improve the salt tolerance of sorghum seedlings by promoting the development of sprout length and root length,increasing the activity of superoxide dismutase,and increasing the content of osmotic regulatory substances and chlorophyll
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维普
