Promoting Effects of Different Types of Seaweed Polysaccharides on Soybean Seedlings under Salt Stress
In order to screen the types of seaweed polysaccharides that can significantly improve the salt resistance of soybeans.The soybean variety Zhonghuang 13 were identified with 100 mmol·L-1 NaCl solution for screening tolerant soybean varieties in soybean seedling stage.After the two true leaves of soybeans have fully unfolded,spray 0.1％of the seaweed polysaccharide solution to compare the effects of different types of seaweed polysaccharides on the growth and physiological indicators of soybean seedlings under salt stress.The results showed that under salt stress,soybean seedlings were suffering from penetration stress and oxidation stress,and growth was suppressed.Applying different types of seaweed polysaccharides can alleviate the inhibition of salt stress on soybean seedling growth to varying degrees,among them spraying fucoidan LT increased the height of plants by 17.86％,root length by 12.37％,and root dry weight by 35.71％compared to the salt stress group.In addition,applying different types of seaweed polysaccharides can also increase chlorophyll and penetrate the material content,significantly enhance the superoxide dismutase(SOD),excessive Oxidase(POD)and Catalase(CAT)activity.The application of different seaweed polysaccharides can also reduce the content of malondialdehyde(MDA)content in soybean seedlings and improve the protective ability of plasma membrane.In conclusion,different types of seaweed polysaccharides can improve the salt resistance of soybean seedlings.Among them,fucoidans was more effective than sodium alginate and polysaccharide from Enteromorpha prolifera on soybean seedling salt stress resistance.
国家科技期刊平台
NSTL
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