11种城市木本植物叶片生理物质对遮荫的响应

Effects of Shading on Physiological Materials of 11 Urban Ligneous Plant Leaf

通过遮光率45%、75%和全光照3种光生境的植物栽培试验,测定了11种城市木本植物叶片叶绿素、花青素、可溶性糖、淀粉和蛋白质的变化,分析了遮荫对不同木本植物生理物质变化的影响,结果表明,遮荫能增加多数植物的叶绿素含量,明显降低花青素含量,特别是色叶植物,从而影响色叶植物的叶色效果,遮荫可减少色叶植物可溶性糖的含量,而增加非色叶植物可溶性糖含量,但对不同类型植物可溶性糖含量的影响幅度不一;遮荫能减少大多数植物的淀粉含量,但使部分色叶植物的淀粉含量增加,而不同遮荫程度对植物叶片淀粉含量的影响没有明显的规律性;光生境变化对植物叶片蛋白质影响缺乏明显的规律性,影响幅度也不一。

The content of chlorophyll, cyaniding, soluble sugar, starch and protein of 11 urban ligneous plant leaf was measured under full exposure, 45% and 75% shade ratio. The result showed that shading could increase chlorophyll content of the most tested plants, but significantly reduce the cyaniding content, especially of the colored-leaf plants, influencing their color forming. Shading could also reduce the soluble sugar content of colored-leaf trees but increase that of the rest ones. Shading could reduce the starch content of most trees except colored-leaf trees. The contents of protein have no obvious change to light intensity.