Yang Xing-yo, Ye Xie-feng, Liu Guo-shun, Wei Hui-qin, Wang Yong
National Tobacco Cultivation Physiology and Biochemistry Research Center, Zhengzhou 450002, China.
Ying Yong Sheng Tai Xue Bao. 2007 Nov;18(11):2642-5.
Through shading with white gauze to simulate different light habitats (100%, 68.2% 35.4% and 16.7% of full sunlight), this paper studied the effects of light intensity on the morphological and physiological characteristics of tobacco seedlings. The results showed that with the decrease of relative light intensity, seedling height increased, while stem circumference, dry weight/fresh weight ratio, leaf thickness, specific leaf weight, and matter accumulation decreased. Less effect of light intensity was observed on the number of seedling leaves. Under weak light condition, the contents of free water, chlorophyll, total nitrogen, and protein in leaves increased, while bound water content, chlorophyll a/b ratio, and invertase activity decreased. The root/shoot ratio, root biomass, and root vitality also decreased. All of these suggested that weak light was unfavorable to the cultivation of strong tobacco seedlings, and the light conditions of seedbed should be improved in tobacco production.
通过用白色纱布遮光以模拟不同光照生境（分别为全日照的100%、68.2%、35.4%和16.7%），本文研究了光照强度对烟苗形态和生理特性的影响。结果表明，随着相对光照强度的降低，烟苗株高增加，而茎围、干重/鲜重比、叶厚度、比叶重和物质积累量降低。光照强度对烟苗叶片数影响较小。在弱光条件下，叶片中自由水、叶绿素、全氮和蛋白质含量增加，而束缚水含量、叶绿素a/b比和转化酶活性降低。根冠比、根生物量和根活力也降低。所有这些表明，弱光不利于培育壮苗，烟草生产中应改善苗床光照条件。
