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Exogenous spraying of 4-chlorophenoxyacetic acid sodium salt promotes growth and flavonoid biosynthesis of mulberry leaves (Morus alba L.)

文献类型： 外文期刊

作者： Zhang, Zhen 1 ; Duan, Yun 1 ; Zhang, Yu 3 ; Zhang, Shanying 2 ; Liang, Xiaoyu 3 ; Li, Jiahao 2 ; Ren, Saihao 2 ; Zhang, Chenghui 2 ; Wang, Meng 3 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Anal & Test Ctr, Haikou 571101, Peoples R China

2.Hainan Univ, Sch Food Sci & Engn, Haikou 570228, Peoples R China

3.Minist Agr, Lab Qual & Safety Risk Assessment Agroprod Haikou, Haikou, Peoples R China

4.Key Lab Trop Fruits & Vegetables Qual & Safety Sta, Haikou 570228, Peoples R China

5.Minist Agr & Rural Affairs, Lab Qual & Safety Risk Assessment Trop Prod, Haikou, Peoples R China

6.Hainan Prov Key Lab Qual & Safety Trop Fruits & Ve, Haikou, Peoples R China

关键词： Mulberry leaf; Flavonoid; 4-chlorophenoxyacetic acid sodium salt; Gene expression

期刊名称：PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS （ 影响因子：3.5； 五年影响因子：3.9 ）

ISSN： 0971-5894

年卷期： 2023 年

页码：

收录情况： SCI

摘要： Mulberry (Morus alba L.) leaves are known as an ideal vegetable with good antioxidant effect, which can bring delicious taste and multiple health benefits. In the present study, the effects of 4-Chlorophenoxyacetic acid sodium salt (4-CPANa) treatment on growth and content of flavonoid compounds in mulberry leaves were investigated. Moreover, the changes in the expression levels of genes involved in flavonoid biosynthetic pathways, and the accumulation of important secondary metabolites including rutin (Rut), chlorogenic acid (ChA), isoquercitrin (IQ) and astragalin (Ast), were investigated in mulberry leaves. The results showed that 4-CPANa treatment could significantly promote the differentiation and growth of mulberry, increased shoot number, bud number, leaf fresh weight and leaf area of mulberry compared with control. Besides, the contents of ChA, Rut, IQ and Ast were significantly increased after 4-CPANa (5 mg/L) treatment. Further analysis revealed that 5 mg/L 4-CPANa strongly induced the expression of flavonoid biosynthesis-related genes including flavonoid 3-O-glucosyltransferase (F3GT) gene, chalcone synthase (CHS) gene, 4-xoumarate-CoA ligase (4CL) and phenylalanine ammonia lyase (PAL) gene. In conclusion, exogenous spraying of 4-CPANa provides a new way to improve the medicinal quality and development of mulberry leaf food with high value.

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