摘要
为研究阴生CAM植物香荚兰(Vimilla fragrans)对不同光照强度的生理反应,观测和比较了生长于不同荫蔽度下的香荚兰叶片气体交换和叶绿素含量以及营养生长和生殖生长,得到如下结果:(1)在90％的高荫蔽度下,幼叶会表现明显的CO_2呼吸释放。在30％的低荫蔽度下,幼叶和成熟叶的C_3和CAM类型的光合作用均表现了不同程度的光抑制;(2)叶片碳收益值以50％荫蔽度的最高,依次为30％,70％和90％;(3)植株营养体的生长量随荫蔽度的增加而降低,30％和50％荫蔽度下的数值相近;(4)开花数和结荚数随荫蔽度的增加而减少,平均荚重和荚长以50％和70％的处理为优。
In order to study the physiological effects of shade plant Vanilla fragrans (Salisb. ) Ames. on different light densities. Gas exchange and chlorophyll content of leaves and vegetalive and reproductional growth in Vanilla fragrans cultivated in different shade densities were measured and compared. Main results are concluded as follows: (1) The young leaves express marked CO2 release from respiration in the 90% shade density. In 30% shade density, both of young and mature leaves show photosynthesis inhibition for different levels; (2) The leaf photosynthesis carbon gain in 50% shade density is the highest. Followings are 30%, 70%and 90% shade density respectively; (3) The plant vegetative growth potential decreases with the shade density increases, and the values in 30% and 50% shade densities are very similar; (4) Numbers of flower and bean pod decrease with the shade desity increases, but the average bean weight and length in 50% and 70% shade densities are superior.
出处
《云南植物研究》
CSCD
1993年第1期71-77,共7页
Acta Botanica Yunnanica
关键词
香荚兰
光合作用
荫蔽度
生长
发育
Vanilla fragrans
Photosynthesis
Vegetative growth
Reproductional growth
Shade density
