The tensor-based model for growth and cell divisions of the root apex. I. The significance of principal directions.

摘要: Plant organs grow symplastically, i.e. in a continuous and coordinated way. Such growth is of tensor nature, which manifested the property that at every point organ three mutually orthogonal principal directions (PDG) can be recognized. The PDGs are postulated to affect orientation cell divisions. This paper shows for first time 2D simulation model cells divide taking into account PDGs. model, conceptually based on (GT), applied root apex radish, having quiescent centre (QC). It how exemplary pattern real develops time. results provide satisfactory description growth. computer-generated realistic more or less steady indicating important Presumably detect obey them course Computer generated division walls, perpendicular PDGs, form periclinal anticlinal zigzags as regular those observed microscopic sections. Growth defines field rates level. QC, fundamental this field, determines group initial is, turn, surrounded by active functional initials, from all tissues originate. present simulations have shown stability depends whether initials permanent; if not case, wall changes accordance with