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作者	单位
谢冬微，王晓楠，付连双，孙健，李卓夫，郑伟³	（1. 东北农业大学农学院，黑龙江哈尔滨 150030； 2. 黑龙江省农业科学院经济作物研究所，黑龙江哈尔滨 150030； 3.黑龙江省农业科学院佳木斯分院，黑龙江佳木斯 154007）

摘要点击次数: 1924

全文下载次数: 1841

中文摘要:

为了解外源海藻糖对小麦抗寒性的影响与作用机理，通过室内盆栽，模拟低温（冷冻）条件,研究外源海藻糖处理下抗寒品种东农冬麦1和弱抗寒品种济麦22的胚芽长、抗寒性相关指标及返青率。结果表明，在4 ℃条件下，抗寒品种东农冬麦1号在10 mmol·L^-1海藻糖处理下胚芽生长最快，弱抗寒品种济麦22在50 mmol·L^-1海藻糖处理下胚芽生长相对较快。在-5~-25 ℃冷冻处理后，东农冬麦1号和济麦22分别在10 mmol·L^-1和50 mmol·L^-1海藻糖处理下，分蘖节相对含水量、脯氨酸含量、可溶性糖含量及返青率相对较高，MDA含量较低。结果说明，外源施加一定浓度的海藻糖可以在一定程度上提高冬小麦对低温（冷冻）的抵抗能力。

英文摘要:

Low temperature is a kind of abiotic stress factors for plant,which is an important limiting factor for the yield of winter wheat in high latitudes areas. In order to know the effects that exogenous trehalose to the embryo length,indexes of cold resistance and reviving rate of winter wheat,Dongnongdongmai 1(cold resistance) and Jimai 22(weak cold resistance) were disposed with different concentrations of exogenous trehalose and freezed at different low temperature in pots indoor. The results showed that the germ was longest for cold resistance variety Dongnongdongmai 1 when trehalose was 10 mmol·L^-1 under 4 ℃,but for cold sensitive variety Jimai 22 was 50 mmol·L^-1. The seedlings of Dongnongdongmai 1 pretreatmented with 10 mmol·L^-1 trehalose had higher relative water content,higher contents of proline and soluble sugar,and higher regreen rate,but lower MDA content in crown under freezing treatment,while the seedlings of Jimai 22 pretreatmented by 50 mmol·L^-1 trehalose had higher contents of proline and soluble sugar,and higher regreen rate,but lower MDA content in croun.So the resistance of winter wheat to low temperature(freeze) can be improved by exogenous trehalose at certain concentrations.

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