Chinese Bulletin of Botany ›› 2020, Vol. 55 ›› Issue (6): 777-787.DOI: 10.11983/CBB20020

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Xyloglucan and the Advances in Its Roles in Plant Tolerance to Stresses

Yingyan Xiao, Weina Yuan, Jing Liu, Jian Meng, Qiming Sheng, Yehuan Tan, Chunxiang Xu*   

  1. College of Horticulture, South China Agricultural University, Guangzhou 510642, China
  • Received:2020-02-10 Accepted:2020-05-08 Online:2020-11-01 Published:2020-11-11
  • Contact: Chunxiang Xu
  • About author:First author contact:

    These authors contributed equally to this paper

Abstract:

Xyloglucan (XyG) is a matrix polysaccharide present in the cell wall of all land plants. It is the most abundant hemicellulose in the primary cell walls of dicots (20%-25%, w/w). As a very important plant cell wall component, XyG is not only involved in plant growth and development, but also plays important roles in responses of plants to various abiotic and biotic stresses. The use of genes involved in XyG biosynthesis and degradation possibly improve the tolerance of plants to stresses through influencing the cell wall structure (remodelling) and compositions. In addition, XyG and XyG oligosaccharides likely act as signaling molecules or cooperate with other signaling molecules to induce plant resistance. Here, we review the structure and variety of XyG, the genes involved in XyG biosynthesis and degradation, and advances in potential roles of XyG and XyG-related genes in responses to biotic and abiotic stresses.

Key words: hemicellulose, xyloglucan metabolism, biotic stress, abiotic stress, resistance