Sugar-induced de novo cytokinin biosynthesis contributes to Arabidopsis growth under elevated CO₂.

ABSTRACT: Carbon availability is a major regulatory factor in plant growth and development. Cytokinins, plant hormones that play important roles in various aspects of growth and development, have been implicated in the carbon-dependent regulation of plant growth; however, the details of their involvement remain to be elucidated. Here, we report that sugar-induced cytokinin biosynthesis plays a role in growth enhancement under elevated CO₂ in Arabidopsis thaliana. Growing Arabidopsis seedlings under elevated CO₂ resulted in an accumulation of cytokinin precursors that preceded growth enhancement. In roots, elevated CO₂ induced two genes involved in de novo cytokinin biosynthesis: an adenosine phosphate-isopentenyltransferase gene, AtIPT3, and a cytochrome P450 monooxy

SUBMITTER: Kiba T 

PROVIDER: S-EPMC6533260 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature