The gene encoding lycopene epsilon cyclase of celery enhanced lutein and beta-carotene contents and confers increased salt tolerance in Arabidopsis
文献类型： 外文期刊
作者： Yin, Lian 1 ; Liu, Jie-Xia 1 ; Tao, Jian-Ping 1 ; Xing, Guo-Ming 2 ; Tan, Guo-Fei 3 ; Li, Sen 2 ; Duan, Ao-Qi 1 ; Ding, X 1 ;
作者机构： 1.Nanjing Agr Univ, Coll Hort, State Key Lab Crop Genet & Germplasm Enhancement, Minist Agr & Rural Affairs,Key Lab Biol & Germpla, 1 Weigang, Nanjing 210095, Peoples R China
2.Shanxi Agr Univ, Collaborat Innovat Ctr Improving Qual & Increase, Taigu, Peoples R China
3.Guizhou Acad Agr Sci, Inst Hort, Guiyang 55006, Peoples R China
关键词： Celery; AgLCY-epsilon; Lutein; beta-carotene; Salt tolerance
期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：4.27； 五年影响因子：4.816 ）
ISSN： 0981-9428
年卷期： 2020 年 157 卷
页码：
收录情况： SCI
摘要： Celery (Apium graveolens L.) is a leafy vegetable of Apiaceae, which is greatly popular because of its rich nutrients. Lutein and beta-carotene are two important carotenoids. Lycopene epsilon cyclase (LCY-epsilon) is a key branch point enzyme in the carotenoid biosynthetic pathway. In this study, we cloned the AgLCY-epsilon gene from celery and overexpressed it in Arabidopsis. The results showed that both lutein and beta-carotene accumulation increased significantly in transgenic Arabidopsis hosting AgLCY-epsilon gene, compared with wild type (WT) plants. The transcription levels of AtPSY and AtCRTLSO genes involved in carotenoids biosynthesis also increased in transgenic lines. One-month-old transgenic Arabidopsis seedlings were treated with 200 mM NaCl. The malondialdehyde (MDA) content in transgenic Arabidopsis plants after salt treatment was significantly lower, and the activities of the two antioxidant enzymes, superoxide dismutase (SOD) and peroxidase (POD), were significantly increased than that of WT plants. Overexpression of AgLCY-epsilon gene showed increased lutein and beta-carotene accumulations, and enhanced salt tolerance in transgenic plants.
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