Cytokinins Act Directly on Lateral Root Founder Cells to Inhibit Root Initiation

In Arabidopsis thaliana, lateral roots are formed from root pericycle cells adjacent to the xylem poles. Lateral root development is regulated antagonistically by the plant hormones auxin and cytokinin. While a great deal is known about how auxin promotes lateral root development, the mechanism of cytokinin repression is still unclear. Elevating cytokinin levels was observed to disrupt lateral root initiation and the regular pattern of divisions that characterizes lateral root development in Arabidopsis. To identify the stage of lateral root development that is sensitive to cytokinins, we targeted the expression of the Agrobacterium tumefaciens cytokinin biosynthesis enzyme isopentenyltransferase to either…

• VF
  Volkswagen Foundation
• IN
  Institut National de la Recherche Agronomique
• VR
  Vlaamse regering
• JD
  Junta de Extremadura
• EA
  Engineering and Physical Sciences Research Council
• BA
  Biotechnology and Biological Sciences Research Council

  Award: BB/D019613/1