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Foliar Spraying of 6-Benzylaminopurine Promotes Growth and Flavonoid Accumulation in Mulberry (Morus alba L.)

文献类型： 外文期刊

作者： Zhang, Zhen 1 ; Zhang, Yu 2 ; Zhang, Shanying 1 ; Wang, Lifeng 3 ; Liang, Xiaoyu 2 ; Wang, Xinquan 5 ; Wu, Huiyi 6 ; Zou, 1 ;

作者机构： 1.Hainan Univ, Sch Food Sci & Engn, Haikou 570228, Hainan, Peoples R China

2.Minist Agr, Lab Qual & Safety Risk Assessment AgroProd Haikou, Haikou 570102, Hainan, Peoples R China

3.Chinese Acad Trop Agr Sci, State Key Lab Incubat Base Cultivat & Physiol Tro, Key Lab Biol & Genet Resources Rubber Tree, Hainan 571101, Peoples R China

4.Chinese Acad Trop Agr Sci, Rubber Res Inst, Minist Agr & Rural Affairs, Danzhou Invest & Expt Stn Trop Crops, Haikou 571101, Hainan, Peoples R China

5.Zhejiang Acad Agr Sci, Inst Qual Safety & Nutr Agroprod, Hangzhou 311799, Peoples R China

6.Hainan Univ, Sch Plant Protect, Haikou 570228, Hainan, Peoples R China

关键词： Mulberry leaf; Flavonoid; 6-Benzylaminopurine; Gene expression

期刊名称：JOURNAL OF PLANT GROWTH REGULATION （ 影响因子：4.169； 五年影响因子：4.038 ）

ISSN： 0721-7595

年卷期：

页码：

收录情况： SCI

摘要： Mulberry (Morus alba L.) leaf, a "source of both medicine and food", contains antioxidant ingredients such as flavonoids, alkaloids and polyphenols. The effects of 6-benzylaminopurine (6-BA) treatment on plant growth and flavonoid contents in mulberry leaves were investigated in this study. The expression of rutin (Rut), chlorogenic acid (ChA), isoquercitrin (IQ) and astragaloside IV (Ast) related genes in the flavonoid synthesis pathways was investigated in mulberry leaves. The results showed that 6-BA treatment significantly promoted mulberry differentiation and growth as well as, increased the numbers of new shoots and buds compared to the control. In addition, 30 mg/L 6-BA significantly increased the contents of Rut, IQ and Ast, and it strongly induced the expression of flavonoid biosynthesis-related genes, including flavonoid 3-O-glucosyltransferase (F3GT), 4-xoumarate-CoA ligase (4CL), phenylalanine (PAL) and chalcone synthase (CHS). The dietary risk assessment of mulberry leaves was based on hormone residues 5 days after treatment with 30 mg /L 6-BA, and the results showed that the dietary exposure risk of 6-BA was extremely low without causing any health concern. Thus, treatment with 30 mg/L 6-BA is a new method to improve the medicinal quality and development of high-value mulberry leaf foods without any potential risk.

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