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Front Plant Sci. 2014 Nov 24;5:669. doi: 10.3389/fpls.2014.00669. eCollection 2014.

Regulation of inflorescence architecture by cytokinins.

Author information

  • 1State Key Laboratory of Plant Genomics, National Center for Plant Gene Research, Institute of Genetics and Developmental Biology - Chinese Academy of Sciences Beijing, China ; University of Chinese Academy of Sciences Beijing, China.
  • 2State Key Laboratory of Plant Genomics, National Center for Plant Gene Research, Institute of Genetics and Developmental Biology - Chinese Academy of Sciences Beijing, China.

Abstract

In flowering plants, the arrangement of flowers on a stem becomes an inflorescence, and a huge variety of inflorescence architecture occurs in nature. Inflorescence architecture also affects crop yield. In simple inflorescences, flowers form on a main stem; by contrast, in compound inflorescences, flowers form on branched stems and the branching pattern defines the architecture of the inflorescence. In this review, we highlight recent findings on the regulation of inflorescence architecture by cytokinin plant hormones. Results in rice (Oryza sativa) and Arabidopsis thaliana show that although these two species have distinct inflorescence architectures, cytokinins have a common effect on inflorescence branching. Based on these studies, we discuss how cytokinins regulate distinct types of inflorescence architecture through their effect on meristem activities.

KEYWORDS:

branching; cytokinin; floral meristem; inflorescence; shoot apical meristem

PMID:
25505480
PMCID:
PMC4241816
DOI:
10.3389/fpls.2014.00669

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