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Effects of exogenous glycinebetaine on the salt-tolerance of wheat

GUO Qi-fang~1,MA Qian-quan~1,SUN Can~1,LV Shou-zhong~2,ZHANG Qing-meng~2,WANG Wei~(1*) (1 College of Life Science,Shandong Agricultural University,Tai'an,Shandong 271018,China;2 Taishan Mountain Seed Production and Management Corporation,Tai'an,Shandong 271000,China)  
Effects of root-applied exogenous glycinebetaine (GB) (15 mmol·L~(-1)) on the salt-tolerance of wheat (Triticum aestivum L.cv.SN215953) seedlings was examined.The results showed that GB treatment could ameliorate the water status of wheat seedlings under salt stress,mainly through enhancing the accumulation of solute sugars and free proline,and thus increasing the osmotic adjustment ability of wheat seedlings under salt stress.GB treatment also could alleviate the oxidative stress caused by salt stress,because GB-treated wheat seedlings maintained high anti-oxidant enzymes (SOD,APX and POD) activities than the non-GB treated seedlings under salt stress.Exogenous GB could also inhibit the degradation of chlorophyll and soluble proteins caused by salt stress and protect the integrity and stability of membrane of wheat seedling under salt stress.
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