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Supplemental blue and red light promote lycopene synthesis in tomato fruits

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  • 国家科技期刊平台
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  • NSTL
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Lycopene,one of the strongest natural antioxidants known and the main carotene in ripe tomato,is very important for human health.Light is well known to be one of the most important environmental stimuli influencing lycopene biosynthesis;specifically,red light induces higher lycopene content in tomato.However,whether blue light promotes lycopene synthesis remains elusive and exactly how light stimulation promotes lycopene synthesis remains unclear.We applied supplemental blue and red lighting on tomato plants at anthesis to monitor the effect of supplemental blue and red lighting on lycopene synthesis.Our results showed that supplemental blue/red lighting induced higher lycopene content in tomato fruits;furthermore,we found that the expression of key genes in the lycopene synthesis pathway was induced by supplemented blue/red light.The expression of light signaling components,such as red-light receptor phytochromes (PHYs),blue-light receptor cryptochromes (CRYs) and light interaction factors,phytochrome-interacting factors (PIFs) and ELONGATED HYPOCOTYL 5 (HY5) were up-or down-regulated by blue/red lighting.Thus,blue and red light increased lycopene content in tomatoes by inducing light receptors that modulate HY5 and PIFs activation to mediate phytoene synthase 1 (PSY1) gene expression.These results provide a sound theoretical basis for further elucidation of the light regulating mechanism of lycopene synthesis in tomatoes,and for instituting a new generation of technological innovations for the enhancement of lycopene accumulation in crop production.

blue lightred lightlycopenephytochromescryptochromes

XIE Bao-xing、WEI Jing-jing、ZHANG Yi-ting、SONG Shi-wei、SU Wei、SUN Guang-wen、HAO Yan-wei、LIU Hou-cheng

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

This work was supported by the National Key Research and Development Program of ChinaTeamwork Projects Funded by Guangdong Natural Science Foundationand the Guangzhou Science & Technology Project

2017YFD0701500China S2013030012842China 201704020058

2019

农业科学学报(英文)
中国农业科学院农业信息研究所

农业科学学报(英文)

CSTPCDCSCDSCI
影响因子：0.576
ISSN：2095-3119
年,卷(期)：2019.18(3)
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