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《Acta Horticulturae Sinica》 2003-05
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Effects of Low Temperature Stress on Physiological Index and Protein Phosphoryla tion in Brassica oleracea L

Wu Nengbiao 1,2 ,Wu Junyan 1,Zhu Liquan 1,and Wang Xiaojia 1 ( 1Horticulture Department,South-West Agriculture University,Chongqing 4 00716,China; 2School of Life Science,South-West Normal University,C hongqing 400715,China)  
The contents of MDA,proline,soluble sugar,ABA,and the a ctivity of PK in Brassica oleracea L.rose remarkably in a short time at 5℃, then went down.And the peak of ABA content and the PK activity were prior to oth er indexes.Low temperature,first of all,caused the activity of PK and the co ntent of endogenesis ABA increase through some signal matter.Then,activated or p rohibited some genes expressing,and at last it caused the content of other matte r rising remarkably.The activity of PK had an apparently reliance on Ca 2+ ,Mn 2+ and Mg 2+ had obvious effect on the PK activity,too.The mechan ism of the two ions to PK might be different.A kind of phosphoprotein (22 9 kD) caused by low temperature stress was separated.
【Fund】: 国家自然科学基金资助项目(3 997051630170646)
【CateGory Index】: S635
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