文献类型： 外文期刊

作者： Gao, XP ¹ ; Pan, QH ² ; Li, MJ ² ; Zhang, LY ² ; Wang, XF ² ; Shen, YY ² ; Lu, YF ² ; Chen, SW ² ; Liang, Z ² ; Zhang, DP ² ;

作者机构： 1.China Agr Univ, China State Key Lab Plant Physiol & Biochem, Beijing 100094, Peoples R China

2.China Agr Univ, China State Key Lab Plant Physiol & Biochem, Beijing 100094, Peoples R China; Shanxi Acad Agr Sci, Arid Farming Res Ctr, Taiyuan 030031, Peoples R China; Chinese Acad Sci, Inst Bot, Beijing 100093, Peoples R China

关键词： abscisic acid;betaine;betaine aldehyde dehydrogenase (1.2.1.8);drought;pear

期刊名称：PLANT AND CELL PHYSIOLOGY （ 影响因子：4.927； 五年影响因子：5.516 ）

ISSN： 0032-0781

年卷期： 2004 年 45 卷 6 期

页码：

收录情况： SCI

摘要： ABA exogenously applied to the leaves of the whole plants of pear (Pyrus bretschneideri Redh. cv. Suly grafted on Pyrus betulaefolia Rehd.) significantly increased the betaine concentrations in the leaves when the plants were well watered. The plants subjected to 'drought plus ABA' treatment had significantly higher betaine concentrations in their leaves than those given drought treatment alone. The 'drought plus ABA' treatment increased the amount of betaine aldehyde dehydrogenase (BADH, EC 1.2.1.8) and its activity in the leaves more than did the drought treatment alone. The experiments with detached leaves showed that ABA treatment significantly increased the concentration of betaine, activity of BADH and apparent amount of BADH in non-dehydrated leaves, and enhanced the accumulation of betaine, activity of BADH and apparent amount of BADH in dehydrated leaves. These effects of ABA were both time- and dose-dependent. Two ABA isomers, (-)-cis, trans-ABA and 2-trans, 4-trans-ABA, had no effect on the betaine accumulation in the leaves, showing that the ABA-induced effects are specific. These data demonstrate that ABA is involved in the drought-induced betaine accumulation in the pear leaves.