黄瓜不同发育时期抗冷特性的研究  

Cold Tolerance of the Cucumber in Different Development Period

作　　者：郭凤领[1] 卢育华[2] 戴照义[1] 

机构地区：[1]湖北省农业科学院经济作物研究所,武汉430064 [2]山东农业大学园艺学院,山东泰安271018

出　　处：《湖北农业科学》2008年第5期544-548,共5页Hubei Agricultural Sciences

基　　金：湖北省农业科技创新中心资助项目(2007-620-01-03)

摘　　要：试验表明,低温条件下黄瓜幼苗期叶片中叶绿素含量、叶片的光合速率、蒸腾强度均能保持较高的水平,对低温不敏感,有一定的适应能力,细胞膜受低温伤害较轻,膜脂过氧化程度较低,膜脂过氧化产物丙二醛(MDA)含量较低,电解质渗漏率较小;渗透调节物质可溶性糖、脯氨酸含量大幅度提高,增强了细胞的渗透调节能力,增加了植物组织束缚水的含量,由于增强了持水力,降低了冰点,从而提高了植株的抗冷性。初花期的黄瓜植株对低温很敏感,膜脂过氧化程度加强,细胞膜受到严重伤害,电解质渗漏率增大,代谢功能急剧下降,尤其光合作用下降明显,严重影响了黄瓜植株的生长发育及以后产量的形成。结果期黄瓜植株抗寒能力明显下降,可能与植株衰老、代谢机能衰退有关。Experiment result indicated that the content of chlorophyll, photosynthesis, rate of transpiration of young cucumber seedling under low temperature condition could keep higher level. Cell membrane was hurt slightly by low temperature. MDA content was lower. The rate of electrolyte seepage was smaller. Dissolubility sugar and proline content increased. These all strengthened the regulating ability of penetration, raised the anti-cold ability of the plant. The cucumber plant during the flowering period was very sensitive to the low temperature, the cell membrane was hurt seriously, electrolyte seepage rate increased, metabolism functionh decreased sharply, photosynthesis decreased obviously. These influenced seriously the growth of the cucumber plant and the formation of the yield. The anti-cold ability of the cucumber plant during the fruit period decreased obviously, which probably related to plant decrepitude.

关 键 词：黄瓜 抗冷特性 发育时期 

分 类 号：S511.01[农业科学—作物学] S642.2