Effects of some important genes, phytohormones, and abiotic factors on wood formation in trees; an overview
Abstract: Wood is vital for development and growth of trees since it offers long‐distance conductance of water and nutrients from roots to leaves mechanical support. Therefore, we sought to define the important factors affecting the wood formation in trees. Wood (secondary xylem) is produced by five main phases, counting cell division, cell expansion, cell wall thickening, cell death, and heartwood (HW) formation. In woody plants, a coherent lateral sheet of meristematic tissue is called vascular cambium, which occurs between the secondary phloem and the secondary xylem. Some important hormones which influence vascular cambium activity include the 1-aminocyclopropane-1-carboxylate (ACC), brassinosteroids (BR), auxin (IAA), cytokinin, ethylene, jasmonic acid (JA), gibberellin (GA), S-adenosyl-L-methionine (SAM) and strigolactone (SL). Apart from that, four main transcription families, KNOX (Knotted-like homeobox), MYB (v-myb avian myeloblastosis viral oncogene homolog), WARKY, and NAC (NAM/ATAF/CUC), which regulate lignin biosynthetic pathway and wood formation in plants are discussed in this study. Moreover, several abiotic factors, such as temperature and seasonal conditions, as well as stresses could affect the wood formation.
Keywords: Genes; Hormones, KNOX; NAC; Vascular cambium; Wood formation
Cite in Nipponpub Style:
Abedi, T. (2021). Effects of some important genes, phytohormones, and abiotic factors on wood formation in trees; an overview. Nipp. J. Environ. Sci., 2(2), 003