Involvement of cytokinins in adventitious and lateral root formation

• Kuroha Takeshi

  Graduate School of Life and Environmental Sciences, University of Tsukuba.

• Satoh Shinobu

  Graduate School of Life and Environmental Sciences, University of Tsukuba.

抄録

The root systems of higher plant consist of primary, lateral, and adventitious roots. There is a current hypothesis, named ‘root apical dominance’, that root-derived suppressor negatively regulates the formation of adventitious and lateral roots. According to this hypothesis, we have studied the mechanisms involved in the regulation of adventitious and lateral root forma-tion. trans-zeatin riboside (ZR), one of cytokinin species, was identified in squash root xylem sap as a main suppressor of adventitious root formation in cucumber, suggesting that ZR transported from root via xylem sap acts as an endogenous suppressor of hypocotyl adventi-tious root formation in planta. Moreover, we isolated Arabidopsis mutant, wooden leg-3 (wol-3), for stimulated adventitious root formation in intact plants. Analyses of wol-3 mutant have revealed that cytokinin receptors are necessary for the primary and lateral root formation via the formation of auxin-transporting vascular tissues in the hypocotyl, but not for adventitious roots. In this review, we discuss the relationship between cytokinin and adventitious and lateral root formation.

収録刊行物

• Plant Root

  Plant Root 1 27-33, 2007

  根研究学会

キーワード

• adventitious root
• auxin
• cytokinin
• lateral root
• xylem sap

詳細情報

• CRID: 1390282680252287744
• NII論文ID: 130000050913
• DOI: 10.3117/plantroot.1.27
• ISSN: 18816754
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可