Effects of Light Qualities on Photosynthetic Response and Nutritional Quality of Savoy

doi:10.7668/hbnxb.2014.S1.047

Abstract

Abstract: The paper studied the effects of different light qualities on the photosynthetic response and nutritional quality of savoy.Juhuaxiaobaye savoy as material,red light,blue light,red/blue (3/1) light,red/blue (7/1) light and white/red/blue (3/2/1) light generated by light-emitting diode were applied.And white light generated by fluorescent lamps was used as control.The results showed that the contents of chlorophyll (a+b) was highest under red/blue (7/1) light treatment,and chlorophyll (a+b) contents were correlated with red/blue ratios positively.The photosynthetic rate (Pn),stomata conductance (Gs),transpiration rate (Er) were biggest under red light.Whereas intercellular CO₂ concentration (Ci) was highest under blue light.The fluorescence parameters were significantly affected by light quality.Values of the maximal photochemical efficiency of PS Ⅱ(Fv/Fm),Fv/Fo and ΦPS Ⅱ were highest under white light.Red light can increase the soluble sugar content but blue light increase soluble protein content,the white light can increase Vitamin C content.Comprehensive analysis,red/blue (7/1) is beneficial to increase the chlorophyll (a+b) contents and improve photosynthetic rate with nutritional quality.

Key words: Savoy, Light quality, Chlorophyll, Photosynthetic response, Nutritional quality

CLC Number:

S634.4

CHEN Xiang-wei, LIU Shi-qi, FENG Lei, LIU Jing-kai, XUE Xiao-yan. Effects of Light Qualities on Photosynthetic Response and Nutritional Quality of Savoy[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2014, 29(S1): 243-248. doi: 10.7668/hbnxb.2014.S1.047.

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