地上部ジベレリンによる根の機能制御  [in Japanese] Control of root functions by shoot-derived gibberellin  [in Japanese]

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Abstract

<p>In plants, long-distance signaling acts as one of the mechanisms for adaptation to environmental change and growth regulation to maintain a balance between distanced organs. Many studies suggest that gibberellins (GAs) behave as long-distance transmitters. GA precursors can move through vascular system. This review focuses on the functions of GA signaling between shoot and root. Root-expressed genes which responding to shoot-derived GAs were identified by microarray analysis in <i>Arabidopsis</i>. Two GA-responding genes (1) IRT1 (Iron Regulated-Transporter 1) and (2) CLE6 (CLAVATA/ESR-RELATED 6) have been identified. IRT1 plays a key role in Fe absorption into root cells from soil. GA promotes the gene expression of <i>IRT1</i> and Fe absorption in root. GAs would be signal transmitters for the acquirement of essential nutrients such as Fe. CLE6 belongs to peptide hormones. Expression of <i>CLE6</i> in root is found in vascular tissue and endodermis and promoted by shoot-derived GAs. Phenotype of GA deficient mutant shows partial recovery recovered by grafting with <i>CLE6</i> overexpression transgenic line. <i>CLE6</i> is up-regulated by GAs and acts as long-distance signal for organ growth. In conclusion, mentioned GA functions are considered essential for information exchange between shoot and root.</p>

<p>In plants, long-distance signaling acts as one of the mechanisms for adaptation to environmental change and growth regulation to maintain a balance between distanced organs. Many studies suggest that gibberellins (GAs) behave as long-distance transmitters. GA precursors can move through vascular system. This review focuses on the functions of GA signaling between shoot and root. Root-expressed genes which responding to shoot-derived GAs were identified by microarray analysis in <i>Arabidopsis</i>. Two GA-responding genes (1) IRT1 (Iron Regulated-Transporter 1) and (2) CLE6 (CLAVATA/ESR-RELATED 6) have been identified. IRT1 plays a key role in Fe absorption into root cells from soil. GA promotes the gene expression of <i>IRT1</i> and Fe absorption in root. GAs would be signal transmitters for the acquirement of essential nutrients such as Fe. CLE6 belongs to peptide hormones. Expression of <i>CLE6</i> in root is found in vascular tissue and endodermis and promoted by shoot-derived GAs. Phenotype of GA deficient mutant shows partial recovery recovered by grafting with <i>CLE6</i> overexpression transgenic line. <i>CLE6</i> is up-regulated by GAs and acts as long-distance signal for organ growth. In conclusion, mentioned GA functions are considered essential for information exchange between shoot and root.</p>

Journal

  • Regulation of Plant Growth & Development

    Regulation of Plant Growth & Development 51(2), 116-122, 2016

    The Japanese Society for Chemical Regulation of Plants

Codes

  • NII Article ID (NAID)
    130005635505
  • NII NACSIS-CAT ID (NCID)
    AA11550064
  • Text Lang
    JPN
  • ISSN
    1346-5406
  • NDL Article ID
    027823826
  • NDL Call No.
    Z18-67
  • Data Source
    NDL  J-STAGE 
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