文献类型： 外文期刊

作者： Gao, XP ¹ ; Wang, XF ² ; Lu, YF ² ; Zhang, LY ² ; Shen, YY 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： Pyrus bretschneideri;betaine aldehyde dehydrogenase;drought tolerance

期刊名称：PLANT CELL AND ENVIRONMENT （ 影响因子：7.228； 五年影响因子：7.791 ）

ISSN： 0140-7791

年卷期： 2004 年 27 卷 4 期

页码：

收录情况： SCI

摘要： Jasmonic acid (JA) is known to be involved in the response of plants to environmental stresses such as drought, and betaine (glycinebetaine) is an osmopretectant accumulated in plants under environmental stresses including drought. However, it remains currently unclear whether JA is involved in the water-stress-induced betaine accumulation in plant leaves. The present experiment, performed with the whole pear plant (Pyrus bretschneideri Redh. cv. Suli), revealed that the exogenously applied JA induced a significant increase of the betaine level in the pear leaves when the plants were not yet stressed by drought, and when the plants were subjected to water stress, the 'JA plus drought' treatment induced a significant higher betaine level than did the drought treatment alone. Meanwhile, the 'JA plus drought' treatment induced higher levels of betaine aldehyde dehydrogenase (BADH, E C 1.2.1.8) and activities in the leaves than did the drought treatment alone. These results obtained in the whole plant experiments were supported by the results of detached leaf experiments. In detached leaves JA induced significant increases in betaine levels, BADH activities and BADH protein amounts in a time- and concentration-dependent manner. These data demonstrate that JA is involved in the drought-induced betaine accumulation in pear leaves.