title: Phosphate deficiency-induced cell wall remodeling: linking gene networks with polysaccharide meshworks.
abstract: The formation of root hairs is a unique developmental process that requires the concerted action of a multitude of proteins. Root hair development is controlled by intrinsic programs, but fine-tuning of these programs occurs in response to environmental signals, dictating the shape and function of epidermal cells. In particular, low availability of soil-immobile mineral nutrients such as phosphate (Pi) affects the density and length of root hairs, resulting in an increased absorptive surface area. We recently reported on a time-course transcriptional profiling study aimed at identifying gene networks that signal Pi deficiency and mediate adaptation to Pi shortage. Using root-specific coexpression analysis of early Pi-responsive genes, we identified a subset of novel loci crucial for the development of root hairs under Pi-deficient conditions. Remodeling of cell wall structures may be associated with the TOR (Target of Rapamycin) pathway, a highly conserved central regulator of growth and development in eukaryotic cells that senses nutrient availability.
authors: Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan.
authors: Ya-Yun
authors: YY
authors: Liao
authors: Thomas J
authors: TJ
authors: Buckhout
authors: Wolfgang
authors: W
authors: Schmidt
mesh_terms: D017360:Arabidopsis / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism*; D002473:Cell Wall / Q000378:metabolism*; D018506:Gene Expression Regulation, Plant; D053263:Gene Regulatory Networks / Q000235:genetics*; D010710:Phosphates / Q000172:deficiency* / Q000378:metabolism; D011134:Polysaccharides / Q000378:metabolism*; D015398:Signal Transduction / Q000235:genetics; D013312:Stress, Physiological / Q000235:genetics
chemical_list: D010710:Phosphates; D011134:Polysaccharides