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研究了不同土壤含水量对日光温室黄瓜生长与物质代谢的影响 ,结果如下 :冬春茬各生育期随着土壤水分的减少 ,不同处理的叶片数、叶面积、株高、节间长均降低。水分亏缺初期 ,叶片脯氨酸含量随着土壤含水量的降低而增加 ,随着时间延长此趋势消失。盛瓜期 Pro含量以 T1最多 ,达 17.95 μg/ g DW,分别是 T2与 T3的 2 .0倍与 2 .4倍 ;末瓜期各处理的 Pro含量均达最高值 ,T1、T2、T3分别为 2 5 .30、15 .6 0、12 .33μg/ g DW,秋冬茬叶片脯氨酸含量变化规律同冬春茬 .无论冬春茬还是秋冬茬 ,游离蛋白质的变化规律同脯氨酸。叶片亚精胺 (Spd)与腐胺 (Put)含量随着土壤水分的减少而增加。不同水分处理对黄瓜叶片精胺(Spm)含量的影响不大。根系中 Spd、Put、Spm的变化趋势同叶片。冬春茬不同水分处理的黄瓜叶片 ABA含量均随着土壤含水量的减少而增加
The effects of soil water content on the growth and material metabolism of cucumber in sunlight greenhouse were studied. The results are as follows: The leaf number, leaf area, plant height and internode length of different treatments were decreased with the decrease of soil water during winter and spring. . In the early stage of water deficit, the proline content of leaves increased with the decrease of soil water content, and disappeared with the extension of time. The content of Pro in the whole melon stage was the highest with T1 of 17.95 μg / g DW, which was 2.0 times and 2.0 times of that of T3 and T2 respectively. Respectively, 25.5, 15.60, 12.33μg / g DW, the changes of the content of proline in the autumn and winter stubble leaves were the same as those in the winter and spring stubble.The changes of free protein in winter and spring stubble were the same as those in the proline . Leaf spermidine (Spd) and putrescine (Put) content increases with the reduction of soil moisture. Different treatments had little effect on the content of spermine (Spm) in cucumber leaves. Roots of Spd, Put, Spm trends with leaves. The ABA content of cucumber leaves under different water treatments increased with the decrease of soil water content