《植物生理学报》 2010, 46(9): 928-932

低温胁迫下乌塌菜对外源硅的生理响应

吴燕^1,*, 高青海²

安徽科技学院1 城建与环境学院农业资源利用重点学科, 2 生命科学学院, 安徽凤阳233100

通信作者：吴燕；E-mail: wuyan109@126.com；Tel: 0550-6732036

摘　要：

在土培条件下, 研究了低温胁迫下不同浓度的硅酸钠对乌塌菜幼苗生长及生理特性的影响。结果表明, 低温胁迫抑制了乌塌菜的生长, 降低了干物质的积累。外施硅可以显著提高乌塌菜叶片SOD、POD、CAT 活性, 迅速积累大量的脯氨酸和可溶性蛋白, 从而有效缓解低温胁迫对乌塌菜幼苗的影响, 尤其是外施0.5 mmol·L-1 Na2SiO3处理15 d时, 乌塌菜干物质积累达到了正常生长植株的86.2%。但随着施用硅浓度的增加, 缓解效果则降低。

关键词：乌塌菜; 低温胁迫; 硅; 生理响应

收稿：2010-04-19   修定：2010-06-13

资助：安徽省教育厅自然科学基金(KJ2010B060)和安徽科技学院人才引进项目(ZRC2009250)。

Physiological Responses of Savoy to Exogenous Silicon under Chilling Stress

WU Yan^1,*, GAO Qing-Hai²

¹College of Urban Construction and Environment Sciences, Key Subject of Agricultural Resources Utilization; ²College of Life Sciences, Anhui Science and Technology University, Fengyang, Anhui 233100, China

Corresponding author: WU Yan; E-mail: wuyan109@126.com; Tel: 0550-6732036

Abstract:

The effects of different silicon concentrations on growth and physiological characteristics of savoy were investigated under chilling stress. The results showed that the growth of savoy was inhibited and dry matter accumulation was decreased under chilling stress. Exogenous silicon could increased the activities of superoxide dismutase, peroxidase and catalase of savoy leaves, and quickly accumulated lots of proline and soluble protein, which efficiently alleviated the effects of chilling stress on savoy. Especially, on the 15th day under chilling stress, dry matter accumulation of savoy reached to 86.2% of plants grown under normal condition, but the alleviated effects decreased with added higher silicon.

Key words: savoy; chilling stress; silicon; physiological response