摘要
草莓是一种营养丰富、经济价值较高的水果,但连作障碍使草莓生长发育不良,产量与品质下降,而造成连作障碍的因素种类繁多,极其复杂。本文以"全明星"生根试管苗为材料,应用组织培养技术分析了根系分泌物对草莓生长的影响。结果表明,根系分泌物显著抑制了植株的生长,降低了根系活力、叶片SOD活性和叶绿素含量,而叶片中的MDA含量和细胞质膜相对透性增加,导致草莓抗病性下降。根系分泌物对草莓的不利影响随浓度的增加而增大,表明草莓根系分泌物可能是造成草莓连作障碍的一个重要原因。
Strawberry is a kind of nutritious fruit with high economic value, but the growth of strawberry was inhibited by the continuous cropping obstacle, with the yield and the quality being decreased. There were various factors resulting in continuous cropping obstacle. In this paper, the effect of root exudates （RE） on strawberry growth was analyzed using tissue culture method. Results showed that RE inhibited the growth of strawberry plant, SOD activities, chlorophyll content and root activities, increased malondialdelyole （MDA） contents and relative permeability of cell membrane in leaves of rooting plants, and decreased the resistant ability of strawberry plants to disease. The greater concentration of RE in the medium, the more significant effect it had on the plants. It is concluded that RE of strawberry was one of the important factors inducing continuous cropping obstacle in strawberry.
出处
《植物营养与肥料学报》
CAS
CSCD
北大核心
2008年第1期189-193,共5页
Journal of Plant Nutrition and Fertilizers
基金
河北省海河流域农业开发推广项目
河北农业大学博士基金资助
关键词
草莓
根系分泌物
连作障碍
组织培养
strawberry
roots exudates
continuous cropping obstacle
tissue culture
作者简介
高志华（1977-），男，河北省井陉县人，讲师，硕士，主要从事生物技术的研究和教学工作。
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