Supplemental blue light increases growth and quality of greenhouse pak choi depending on cultivar and supplemental light intensity

doi:10.1016/S2095-3119(18)62064-7

Journal of Integrative Agriculture ›› 2018, Vol. 17 ›› Issue (10): 2245-2256.DOI: 10.1016/S2095-3119(18)62064-7

收稿日期:2017-10-11 出版日期:2018-10-01 发布日期:2018-09-29

Supplemental blue light increases growth and quality of greenhouse pak choi depending on cultivar and supplemental light intensity

ZHENG Yin-jian^{1, 2}, ZHANG Yi-ting¹, LIU Hou-cheng¹, LI Ya-min¹, LIU Ying-liang², HAO Yan-wei¹, LEI Bing-fu^{1, 2}

^{¹ College of Horticulture, South China Agricultural University, Guangzhou 510642, P.R.China

² College of Materials and Energy, South China Agricultural University, Guangzhou 510642, P.R.China}

Received:2017-10-11 Online:2018-10-01 Published:2018-09-29
Contact: Correspondence LIU Hou-cheng, Tel: +86-20-85280464, E-mail: liuhch@scau.edu.cn
About author:ZHENG Yin-jian, E-mail: yinjianzheng@qq.com;
Supported by:
This work was supported by the National Key Research and Development Program of China (2017YFD0701500), the Teamwork Projects Funded by Guangdong Natural Science Foundation, China (S2013030012842), the Guangdong Provincial Science & Technology Project, China (2015A020209146, 2015B090903074), and the Guangzhou Science & Technology Project, China (201605030005, 201704020058).

摘要/Abstract

Abstract:

To evaluate the supplementary blue light intensity on growth and health-promoting compounds in pak choi (Brassica campestris ssp. chinensis var. communis), four blue light intensity treatments (T0, T50, T100 and T150 indicate 0, 50, 100, and 150 μmol m^–2 s^–1, respectively) were applied 10 days before harvest under greenhouse conditions. Both of cultivars (green- and red-leaf pak choi) under T50 had the highest yield, content of chlorophyll and sugars. With light intensity increasing, antioxidant compounds (vitamin C and carotenoids) significantly increased, while nitrate content showed an opposite trend. The health-promoting compounds (phenolics, flavonoids, anthocyanins, and glucosinolates) were significantly higher under supplementary light treatment than T0, so as the antioxidant capacity (2,2-diphenyl-1-picrylhydrazyl and ferric-reducing antioxidant power). The species-specific differences in photosynthetic pigment and health-promoting compounds was found in green- and red-leaf pak choi. T50 treatment could be used for yield improvement, whereas T100 treatment could be applied for quality improvement. Results showed that blue light intensity can regulate the accumulation of biomass, morphology and health-promoting compounds in pak choi under greenhouse conditions.

Key words: blue light , antioxidant compounds , health-promoting compounds , species-specific , pak choi

. [J]. Journal of Integrative Agriculture, 2018, 17(10): 2245-2256.

ZHENG Yin-jian, ZHANG Yi-ting, LIU Hou-cheng, LI Ya-min, LIU Ying-liang, HAO Yan-wei, LEI Bing-fu. Supplemental blue light increases growth and quality of greenhouse pak choi depending on cultivar and supplemental light intensity[J]. Journal of Integrative Agriculture, 2018, 17(10): 2245-2256.

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Supplemental blue light increases growth and quality of greenhouse pak choi depending on cultivar and supplemental light intensity

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