淹水对黄瓜幼苗生长和生理指标的影响

Effects of Waterlogging Stress on Growth and Physiological Index in Cucumber Seedlings

以黄瓜品种津研7号(Cucumis sativus L.cv.Jinyan No.7)为材料,研究了不同淹水胁迫时间对黄瓜幼苗生长、叶绿素与丙二醛含量的影响。结果表明,淹水胁迫下黄瓜幼苗的株高、叶片数、地上部鲜重、总根长度、总投影面积、总表面积与不淹水对照差异不显著,根鲜重、根系平均直径、根系总体积则显著高于对照,但根尖数量、根分叉数量与对照相比先增后减,黄瓜幼苗的叶绿素含量显著低于对照,丙二醛含量显著高于对照。说明黄瓜能耐受一定程度的淹水胁迫,但耐淹水胁迫的能力有限,淹水胁迫下黄瓜幼苗生理受到显著伤害,光合作用显著减弱。

The effects of waterlogging stress on the growth, chlorophyll and MDA content of cucumber seedlings were studied by using cucumber varieties （Cucumis sativus L. cv. Jinyan No.7） as materials. The results show that plant height, leaf num- ber, shoot fresh weight, total root length, total projection area and total surface area of cucumber seedlings was not significant different with that of the control, root fresh weight, root average diameter, total root volume was significantly higher than that of control, but the number of root tips and furcation number increased first and then reduced than that of CK, the chlorophyll content of cucumber seedlings was significantly lower than that of control, MDA content was significantly higher than that of control under waterlogging stress. It was showed that the cucumber was tolerant to waterlogging stress, but the a- bility of waterlogging stress was limited, and the physiological was significantly hurt and photosynthesis of cucumber seedlings was significantly affected under waterlogging stress.