title: Characterization of root response to phosphorus supply from morphology to gene analysis in field-grown wheat.
abstract: The adaptations of root morphology, physiology, and biochemistry to phosphorus supply have been characterized intensively. However, characterizing these adaptations at molecular level is largely neglected under field conditions. Here, two consecutive field experiments were carried out to investigate the agronomic traits and root traits of wheat (Triticum aestivum L.) at six P-fertilizer rates. Root samples were collected at flowering to investigate root dry weight, root length density, arbusular-mycorrhizal colonization rate, acid phosphatase activity in rhizosphere soil, and expression levels of genes encoding phosphate transporter, phosphatase, ribonucleases, and expansin. These root traits exhibited inducible, inhibitory, or combined responses to P deficiency, and the change point for responses to P supply was at or near the optimal P supply for maximum grain yield. This research improves the understanding of mechanisms of plant adaptation to soil P in intensive agriculture and provides useful information for optimizing P management based on the interactions between soil P dynamics and root processes.
authors: The State Key Laboratory for Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, PR China.
authors: Wan
authors: W
authors: Teng
authors: Yan
authors: Y
authors: Deng
authors: Xin-Ping
authors: XP
authors: Chen
authors: Xiao-Feng
authors: XF
authors: Xu
authors: Ri-Yuan
authors: RY
authors: Chen
authors: Yang
authors: Y
authors: Lv
authors: Yan-Yan
authors: YY
authors: Zhao
authors: Xue-Qiang
authors: XQ
authors: Zhao
authors: Xue
authors: X
authors: He
authors: Bin
authors: B
authors: Li
authors: Yi-Ping
authors: YP
authors: Tong
authors: Fu-Suo
authors: FS
authors: Zhang
authors: Zhen-Sheng
authors: ZS
authors: Li
mesh_terms: D018533:Biomass; D035264:Flowers / Q000187:drug effects / Q000235:genetics; D018506:Gene Expression Regulation, Plant / Q000187:drug effects; D017343:Genes, Plant / Q000235:genetics; D010758:Phosphorus / Q000378:metabolism / Q000494:pharmacology*; D018517:Plant Roots / Q000033:anatomy & histology* / Q000187:drug effects / Q000235:genetics* / Q000254:growth & development; D018520:Plant Shoots / Q000187:drug effects / Q000235:genetics / Q000378:metabolism; D012987:Soil; D014908:Triticum / Q000033:anatomy & histology* / Q000187:drug effects / Q000235:genetics* / Q000254:growth & development
chemical_list: D012987:Soil; D010758:Phosphorus
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