减光条件下番茄生态生理变化研究

Study on Changes of Tomato Ecology and Biology Characteristics Under Decreasing-light Conditions

从遮光对番茄生长、发育、生理、生化特性的影响等方面进行了研究。结果表明,遮光后番茄株高增加,茎相变化不明显且不同品种表现无规律,但株高与茎粗比值均加大,平均节间长加大,叶面积增加,地上部干鲜重下降。在生长函数中,LWR、LAR、SLA增加,NAR下降,其他生长函数变化规律不明显。遮光后番茄的光合速率下降,过氧化物酶和过氧化氢酶活性,总叶绿素,叶绿素a、b,类胡萝卜素含量均上升,而叶绿素a/b比值变化无规律。

Changes of tomato morphology characteristics under shading treatments.After shading, Plant height was increased, plant stem diometer didn't vary obviously and different varieties showed irregularily, however, the ratio of plant height to stem enlarged. The average distance between leaves and leaf area were enhanced, the dry or flesh weight of the parts above the ground was reduced. Of all growth parameter, LWR、LAR、SLA incereased, NAR droped, other grows parameter varied irregularily. Changes of tomato biological charateristics under shading treatments. The photosynthetic rate under shading treatments was fallen, activities of peroxidase, katalase, chlorophyll contain,chla,chlb, carotenoid went up. But the ratio of chla to chlb was changed irregularily.