2013•Zhongguo yancao xuebaoRequires access
Effects of different light qualities on growth and development and photosynthetic physiological characteristics of flue-cured tobacco seedlings in floating system
Wang Xufeng
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Abstract
Effect of different light qualities(red light,blue light,white light) on leaf growth and development and photosynthetic characteristics in flue-cured tobacco seedlings in floating system were studied.Results showed that:(1) tobacco seedlings stalk thickening was influenced by light quality,i.e.promoted by red light and suppressed by the blue light;(2) tobacco seedling leaf development was significantly inhibited by blue light,especially in leaf elongation;(3) leaves in red light treatment showed higher Chlb content.Net photosynthetic rate(Pn),stomatal conductance(Gs) and transpiration rate(Tr) was significantly lower under blue light than under white and red light.Complement white and red light can promote seedling grow.Blue-violet ray supplement in seedling morphogenesis can inhibit seedling growth.