根的发育().pptVIP

* Which organ emerges first after sowing of seeds? 第9章 根的发育 RAM 9.1 Root structure and morphogenesis 9.1 Root structure and morphogenesis 9.1 Root structure and morphogenesis 9.1 Root structure and morphogenesis （Van den Berg, C., Willemsen, V., Hendriks, C., Weisbeek, P. and Scheres, B. (1997). Short-range control of cell differentiation in the Arabidopsis root meristem. Nature 390, 287-289.） 9.1 Root structure and morphogenesis Van den Berg, C., Willemsen, V., Hage, W., Weisbeek, P., and Scheres, B., (1995). Cell fate in the Arabidopsis root determined by directional signalling. Nature 378, 62-65. 9.1 Root structure and morphogenesis 9.1 Root structure and morphogenesis (N) Mid-torpedo stage embryo, ML. (O-R) Mid-torpedo stage embryo, TS at hy, r, qc and col levels. (S)Mature embryo, ML. (T-W) Mature embryo, TS at hy, root proximal initials, qc and col regions. 9.1 Root structure and morphogenesis Lateral root formation in willow 侧根原基起源于初生根RAM后面成熟区紧邻木质部的中柱鞘细胞。 Lateral root primordia development in Arabidopsis traced with 35S:AC:GUS. What factors affect lateral root development? 9.1 Root structure and morphogenesis Auxin Localization of PIN proteins suggests auxin transport routes Root hair Lateral root Why root hair does not develop from all of epidermic cells? Root hair Lateral root 9.1 Root structure and morphogenesis Other cells C C C C C C C C N N N N N N N N H H H H H H H H T junction Epidermal cell layer Cortical cell Why root hair does not develop from all of epidermic cells? 9.1 Root structure and morphogenesis 9.2 Genetic control of root development 9.2 Genetic control of root development Wild type shr wol fs 9.2 Genetic control of root development WER CPC AtPLD RHL1 RHL2 RHL3 CPC ATPLD Trichoblast Atrichoblast 9.2 Genetic control of root development How about the genetic control of root hair development? AtPLDζ1 Arrows indicate strong fluorescence signals around (D) bulges and (G) the root-hair apex. (F) A light image of the root in (D