Advances in Lignin Accumulation and Regulation in Horticultural Crops

Abstract

Lignin is an important secondary metabolite in horticultural crops that maintains mechanical strength and enhances the ability to respond to external environmental changes. However, lignin overaccumulation leads to lignification and reduces the taste quality and nutritional value of horticultural crops. Therefore, it is necessary to control the lignin content at a reasonable level in horticultural crops. In recent decades, the biosynthesis and regulation of lignin attracted the widespread attention of researchers, and significant progress has been made in understanding the mechanisms of lignin accumulation. In this review, we summarize the research progress on lignin biosynthesis in horticultural crops. In addition, the effects of different environmental conditions and plant hormones on lignin accumulation were also discussed. This review contributes to a better understanding of the accumulation of lignin in horticultural crops and provides new strategies to enhance the nutritional and commercial value of horticultural products.