Related Experiment Video
Updated: Oct 3, 2025

An Effective Inoculation Method for Phytophthora capsici on Black Pepper Plants
Published on: September 16, 2022
The Capsicum MYB31 regulates capsaicinoid biosynthesis in the pepper pericarp
Binmei Sun1, Changming Chen1, Jiali Song1
1Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in South China, Ministry of Agriculture and Rural Areas, College of Horticulture, South China Agricultural University, Guangzhou, 510642, China.
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.
More Related Videos
08:27Analysis of Effect of Compound Salt Stress on Seed Germination and Salt Tolerance Analysis of Pepper Capsicum annuum L.
Published on: November 30, 2022
06:05Advanced Glycation End-Products Sensitize Human Sensory-Like Neuron Cells to Capsaicin-Induced Calcium Influx
Published on: May 2, 2025
Related Concept Videos
C4 Pathway and CAM
C4 Pathway
The C4 pathway is used by plants such as...
Fruit Development, Structure, and Function
Gene Regulation During Sporulation
Regulation of Transpiration by Stomata
MAPK Signaling Cascades
Cell Signaling in Plants