BACKGROUND: Plant development is exquisitely environmentally sensitive, with plant hormones acting as long-range signals that integrate developmental, genetic, and environmental inputs to regulate development. A good example of this is in the control of shoot branching, where wide variation in plant form can be generated in a single genotype in response to environmental and developmental cues. RESULTS: Here we present evidence for a novel plant signaling molecule involved in the regulation of shoot branching. We show that the MAX3 gene of Arabidopsis is required for the production of a graft-transmissible, highly active branch inhibitor that is distinct from any of the previously characterized branch-inhibiting hormones. Consistent with its proposed function in the synthesis of a novel signaling molecule, we show that MAX3 encodes a plastidic dioxygenase that can cleave multiple carotenoids. CONCLUSIONS: We conclude that MAX3 is required for the synthesis of a novel carotenoid-derived long-range signal that regulates shoot branching.
BACKGROUND: Plant development is exquisitely environmentally sensitive, with plant hormones acting as long-range signals that integrate developmental, genetic, and environmental inputs to regulate development. A good example of this is in the control of shoot branching, where wide variation in plant form can be generated in a single genotype in response to environmental and developmental cues. RESULTS: Here we present evidence for a novel plant signaling molecule involved in the regulation of shoot branching. We show that the MAX3 gene of Arabidopsis is required for the production of a graft-transmissible, highly active branch inhibitor that is distinct from any of the previously characterized branch-inhibiting hormones. Consistent with its proposed function in the synthesis of a novel signaling molecule, we show that MAX3 encodes a plastidic dioxygenase that can cleave multiple carotenoids. CONCLUSIONS: We conclude that MAX3 is required for the synthesis of a novel carotenoid-derived long-range signal that regulates shoot branching.
Authors: Joanne L Simons; Carolyn A Napoli; Bart J Janssen; Kim M Plummer; Kimberley C Snowden Journal: Plant Physiol Date: 2006-12-08 Impact factor: 8.340
Authors: Leonardo Giliberto; Gaetano Perrotta; Patrizia Pallara; James L Weller; Paul D Fraser; Peter M Bramley; Alessia Fiore; Mario Tavazza; Giovanni Giuliano Journal: Plant Physiol Date: 2004-12-23 Impact factor: 8.340
Authors: Christopher I Cazzonelli; Abby J Cuttriss; Susan B Cossetto; William Pye; Peter Crisp; Jim Whelan; E Jean Finnegan; Colin Turnbull; Barry J Pogson Journal: Plant Cell Date: 2009-01-27 Impact factor: 11.277
Authors: Adrian Scaffidi; Mark T Waters; Yueming K Sun; Brian W Skelton; Kingsley W Dixon; Emilio L Ghisalberti; Gavin R Flematti; Steven M Smith Journal: Plant Physiol Date: 2014-05-07 Impact factor: 8.340