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| Effects of Different LED Light Qualities on Growth，Nutritional Quality and Antioxidant Activity of Mustard Sprouts |
| MO Yanling1，LUO Yalan2，LIU Yihua1，ZENG Jing1，GUO Jian3，CHEN Jingjing1* |
| 1School of Advanced Agriculture and Bioengineering，Yangtze Normal University，Chongqing 408100，China；2College of Horticulture，Shanxi Agricultural University，Taigu 030801，Shanxi，China；3Chongqing Fuling Agri-products Quality and Safety Center，Chongqing 408100，China |
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Abstract The effects of different LED light qualities on growth，nutritional quality and antioxidant property of mustard sprouts were studied using‘Shaguodiqingcai’mustard as material，which were treated with five treatments including white light（control），green light，red light，blue light and red/blue light（R∶B = 3∶2）．The results showed that compared with control（white light），blue light promoted the growth of mustard sprouts，improved the nutritional quality，and enhanced the antioxidant ability．Specifically，blue light significantly increased the plant fresh mass，plant dry mass，edible fresh mass and output rate of mustard sprouts，improved the contents of soluble protein，soluble sugar，free amino acid，VC，anthocyanin，total phenolic and total flavonoid，decreased the crude fibre content，enhanced the DPPH free radical scavenging ability，and upregulated the gene expression levels of BjPAL and BjCHI that play vital roles in synthesis pathway of phenols．Using the membership function method to comprehensively assess，it was found that blue light made mustard sprouts get the highest membership function value，thus was the best light environment regulatory illuminant to cultivate mustard sprouts．
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Received: 24 February 2023
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