Gibberellin Acts Positively Then Negatively to Control Onset of Flower Formation in Arabidopsis-Reference-Cited by-同舟云学术

Gibberellin Acts Positively Then Negatively to Control Onset of Flower Formation in Arabidopsis

Published:2014-05-09 Issue:6184 Volume:344 Page:638-641
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Yamaguchi Nobutoshi¹,Winter Cara M.¹,Wu Miin-Feng¹,Kanno Yuri²,Yamaguchi Ayako¹,Seo Mitsunori²,Wagner Doris¹

Affiliation:

1. Department of Biology, University of Pennsylvania, 415 South University Avenue, Philadelphia, PA 19104–6018, USA.

2. RIKEN Center for Sustainable Resource Science, Yokohama, Kanagawa, 230-0045, Japan.

Abstract

One Hormone, Two Phases The switch from vegetative growth to flowering in the plant Arabidopsis involves two phases—inflorescence branching and flowering. Yamaguchi et al. (p. 638 ) examined how the phytohormone gibberellin regulates each phase differently. First, gibberellin levels increase and stimulate production of key flowering factors, one of which degrades gibberellin. As gibberellin levels then fall, the next phase of flowering factors is released from gibberellin repression. By regulating inflorescence branching separately from flowering, this system determines overall seed yield.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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