The timing of low R:FR exposure profoundly affects Arabidopsis branching responses Academic Article

abstract

• The ratio of Red to Far Red light (R:FR) is sensed by phytochromes, including phytochrome B, and serves as a signal of potential competition. Low R:FR represses Arabidopsis thaliana branching by promoting the accumulation of abscisic acid in the young buds and by enhancing auxin signaling in the main shoot. While overall plant level branching is reduced by low R:FR, the growth of the uppermost branches tends to be promoted while the lower buds are suppressed. Buds at intermediate positions can show either growth promotion or growth suppression by low R:FR if they become exposed to low R:FR late or early, respectively. This pattern suggests that developmental stage specific programming occurs to modify the response of specific buds to branching regulators including auxin and ABA. 2014 Landes Bioscience.

authors

• Finlayson, Scott

published proceedings

• PLANT SIGNALING & BEHAVIOR

author list (cited authors)

• Reddy, S. K., Holalu, S. V., Casal, J. J., & Finlayson, S. A.

citation count

• 6

complete list of authors

• Reddy, Srirama Krishna||Holalu, Srinidhi V||Casal, Jorge J||Finlayson, Scott A

publication date

• January 2014

publisher

• Taylor & Francis  Publisher

published in

• Plant Signaling and Behavior  Journal

keywords

• Abscisic Acid
• Arabidopsis
• Auxin
• Branching
• Bud
• Phytochrome
• Red Light: Far Red Light

Digital Object Identifier (DOI)

• 10.4161/psb.28668

start page

• e28668

end page

• e28668

volume

• 9

issue

• 5

URL

• http%3A%2F%2Fdx.doi.org%2F10.4161%2Fpsb.28668