弱光对日光温室黄瓜光合产物分配的影响

研究了弱光逆境对日光温室黄瓜生长发育及同化物分配的影响，结果表明，光照是影响日光温室黄瓜生长发育的首要环境因子，弱光使黄瓜生长变慢，化瓜率升高，产量下降，弱光条件下黄瓜功能叶片光合产物输出比率显著降低，向瓜和生长点中的分配明显减少，向茎和根中的分配随环境条件下不同而异，，日光温室和人工气候箱内的弱光处理对黄瓜光合产物分配的影响是不同的。

Influence of Poor Light on the Distribution Pattern of Assimilate of Cucumber in Solar Greenhouse

The influence of poor light stress on development, photosynthesis, the distribution pattern of assimilate of cucumber in greenhouse were studied in comparison with that of normal light environment in winter and spring. Results show: The light intensity is the most important factor that affects the development of cucumber. The poor light stress in solar greenhouse decrease the growth rate, increase the abortion rate and decrease the yield of cucumber. The cucumber from low light and shade environment has, as compared to those from high light and sun condition, a substantial decrease in the amount of assimilate exported from the functional leaves, and the distribution pattern is changed: the assimilate distributed to fruit and growing point remarkably reduces, the amount of assimilate distributed to root and stem varies according to different environment.