Volume 20, No 5, May 2010
ISSN: 1001-0602
EISSN: 1748-7838 2018
impact factor 17.848*
(Clarivate Analytics, 2019)
Volume 20 Issue 5, May 2010: 576-586
ORIGINAL ARTICLES
The BUD2 mutation affects plant architecture through altering cytokinin and auxin responses in Arabidopsis
Xia Cui1,*, Chunmin Ge1,3,*, Renxiao Wang1,4, Huanzhong Wang1,5, Weiqi Chen2, Zhiming Fu1, Xiangning Jiang2, Jiayang Li1 and Yonghong Wang1
1State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
2The Tree and Ornamental Plant Breeding and Biotechnology Laboratory of State Forestry Administration, College of Life Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China
3Current address: The Stowers Institute for Medical Research, Kansas, USA.
4Current address: Institute of Biology II, Albert Ludwigs University, Freiburg, Germany
5Current address: The Samuel Roberts Noble Foundation, Ardmore, USA
Correspondence: Yonghong Wang,(yhwang@genetics.ac.cn)
The ratio of auxin and cytokinin plays a crucial role in regulating aerial architecture by promoting or repressing axillary bud outgrowth. We have previously identified an Arabidopsis mutant bud2 that displays altered root and shoot architecture, which results from the loss-of-function of S-adenosylmethionine decarboxylase 4 (SAMDC4). In this study, we demonstrate that BUD2 could be induced by auxin, and the induction is dependent on auxin signaling. The mutation of BUD2 results in hyposensitivity to auxin and hypersensitivity to cytokinin, which is confirmed by callus induction assays. Our study suggests that polyamines may play their roles in regulating the plant architecture through affecting the homeostasis of cytokinins and sensitivities to auxin and cytokinin.
Cell Research (2010) 20:576-586. doi:10.1038/cr.2010.51; published online 13 April 2010
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