Effects of Combination of Orange and Blue LED on Photosynthetic Characteristics andFluorescence Parameter of Paris polyphylla var. yunannensis

doi:10.11924/j.issn.1000-6850.casb16050078

Abstract

Abstract: In order to study the effect of different ratios of orange and blue LED light on photobiological characteristics of Paris polyphylla var. yunannensis, and provide a theoretical basis for the LED light used in the production of P. polyphylla var. yunannensis, 3-year-old seedlings of P. polyphylla var. yunannensis were selected as materials. Four light quality treatments were set by orange 620 nm and blue 460 nm LED light as O:B=2:1, O:B=4:1, O:B=6:1, and O:B=8:1, the influences on biological fresh weight, photosynthetic characteristics and chlorophyll fluorescence parameters were studied. The results showed that the combination of O:B=4:1 was most beneficial to the synthesis of photosynthetic pigments, with the highest efficiency of passing luminous energy, while the set of O:B=8:1 had the lowest one. The net photosynthetic rate, stomatal conductance, intercellular CO₂ concentration and transpiration rate were the highest under the combination of O:B=4:1, while O:B=2:1 ranked the lowest. Besides, O:B=4:1 combination also owned the highest parameters in Fv/Fm, Fv''/Fm'', ΦPSⅡ, qP. As a conclusion, all photosynthesis and fluorescence parameters showed that O:B=4:1 combination was most advantageous to photosynthesis of Paris polyphylla var. yunannensis leaves.

Huang Xi,Liang Shewang,Cai Huming,Zhou Wen and He Zhongjun. Effects of Combination of Orange and Blue LED on Photosynthetic Characteristics andFluorescence Parameter of Paris polyphylla var. yunannensis[J]. Chinese Agricultural Science Bulletin, 2016, 32(22): 98-103.

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