Plant Physiology and Biochemistry2022，Vol.17610.DOI:10.1016/j.plaphy.2022.02.014

The Capsicum MYB31 regulates capsaicinoid biosynthesis in the pepper pericarp

Sun, Binmei Chen, Changming Song, Jiali Zheng, Peng Wang, Juntao Wei, Jianlang Cai, Wen Cai, Yutong Yuan, Yuan Zhang, Shuanglin Liu, Shaoqun Lei, Jianjun Cheng, Guoju Zhu, Zhangsheng Chen, Siping
Plant Physiology and Biochemistry2022，Vol.17610.DOI:10.1016/j.plaphy.2022.02.014
✕
  • NSTL
  • Elsevier

The Capsicum MYB31 regulates capsaicinoid biosynthesis in the pepper pericarp

Sun, Binmei 1Chen, Changming 1Song, Jiali 1Zheng, Peng 1Wang, Juntao 1Wei, Jianlang 1Cai, Wen 1Cai, Yutong 1Yuan, Yuan 2Zhang, Shuanglin 1Liu, Shaoqun 1Lei, Jianjun 1Cheng, Guoju 1Zhu, Zhangsheng 1Chen, Siping1
扫码查看

作者信息

  • 1. South China Agr Univ
  • 2. Shaoguan Univ
  • 折叠

Abstract

Pepper (Capsicum) are consumed worldwide as vegetables and food additives due to their pungent taste. Capsaicinoids are the bioactive compounds that confer the desired pungency to pepper fruits. Capsaicinoid biosynthesis was thought to occur exclusively in fruit placenta. Recently, biosynthesis in the pericarp of extremely pungent varieties was discovered, however, the mechanism of capsaicinoid biosynthesis regulation in the pericarp remains largely unknown. Here, the capsaicinoid contents of placenta and pericarp were analyzed. The results indicated that the Capsicum chinense pericarp accumulated a vast amount of capsaicinoids. Expression of the master regulator MYB31 and capsaicinoid biosynthesis genes (CBGs) were significantly upregulated in the pericarp in C. chinense accessions compared to accessions in other tested species. Moreover, in fruit of extremely pungent 'Trinidad Moruga Scorpion' (C. chinense) and low-pungent '59' inbred line (C. annuum), the capsaicinoid accumulation patterns in the pericarp were consistent with expression levels of CBGs and MYB31. Silencing MYB31 in 'Trinidad Moruga Scorpion' pericarp leads to a significantly decreased CBGs transcription level and capsaicinoids content. Taken together, our results provide insights into the molecular mechanism arising from the expression of MYB31 in the pericarp that results in exceedingly hot peppers.

Key words

Hot pepper/Capsaicinoids/Pericarp/Capsaicinoid biosynthesis genes/Master regulator MYB31/CHILI-PEPPERS/INTRACELLULAR-LOCALIZATION/PUNGENT PRINCIPLE/PROVIDES INSIGHTS/CHINENSE JACQ./ACCUMULATION/FRUIT/ANALOGS/GENES/EXPRESSION

引用本文复制引用

出版年

2022
Plant Physiology and Biochemistry

Plant Physiology and Biochemistry

SCI
ISSN：0981-9428
被引量1
参考文献量40
段落导航相关论文