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Dynamic Changes of Soluble Protein in Different Provenances of Toona sinensis under Drought Stress

ZHANG Qiang et al (Department of Life Science,Zhengzhou Normal College,Zhengzhou,Henan 450044)  
[Objective] The study aimed to discuss the dynamic change of soluble protein accumulation in Toona sinensi seedlings under the drought stress and their difference among provenances.[Method] In the pot test,the 1-year-old stump seedlings of T.sinensi from 6 provenances of Jiansu,Sichuan,Hunan,Hubei,Henan and Shaanxi were selected to study the dynamic change of soluble protein in T.sinensi.[Result] The soluble protein content in T.sinensi from 6 provenances under drought stress showed the increasing tendency with the intensity of drought stress.Their change extent was different for the same provenance in different phases and for the same phase among different provenances.Under the heavy drought stress,the soluble protein content in T.sinensi from the provenance of Ankang in Shaanxi during the treating initial stage and final stage was higher than that of CK and so did for that from the provenance of Xixia in Henan during the treating final stage.While that from provenance of Nanjing in Jiangsu during treating final stage was higher than that of CK under two different drought stress levels and that from other provenances were all less than that of CK during different stages.After rewatering,all soluble protein contents from 6 provenances maintained the increasing tendency slowly.[Conclusion] T.sinensi from the 3 provenances of Ankang,Xixia and Nanjing showed some adaptability to the drought during the treating final stage.
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