NDLI: The Arabidopsis Auxin-Inducible Gene ARGOS Controls Lateral Organ Size

Content Provider	PubMed Central
Author	Hu, Yuxin Xie, Qi Chua, Nam-hai
Copyright Year	2003
Abstract	During plant development, the final size of an organ is regulated and determined by various developmental signals; however, the molecular mechanisms by which these signals are transduced and the mediators involved are largely unknown. Here, we show that ARGOS, a novel Arabidopsis gene that is highly induced by auxin, is involved in organ size control. Transgenic plants expressing sense or antisense ARGOS cDNA display enlarged or reduced aerial organs, respectively. The alteration in organ size is attributable mainly to changes in cell number and the duration of organ growth. Ectopic expression of ARGOS prolongs the expression of AINTEGUMENTA (ANT) and CycD3;1 as well as the neoplastic activity of leaf cells. Moreover, organ enlargement in plants overexpressing ARGOS can be blocked by the loss of function of ANT, implying that ARGOS functions upstream of ANT to affect the meristematic competence of organ cells. The induction of ARGOS by auxin is attenuated or abolished in auxin-resistant1 (axr1), and overexpression of ARGOS partially restores axr1 organ development. These results suggest that ARGOS may transduce auxin signals downstream of AXR1 to regulate cell proliferation and organ growth through ANT during organogenesis.
Related Links	http://dx.doi.org/10.1105/tpc.013557
Ending Page	1961
Page Count	11
Starting Page	1951
File Format	PDF
ISSN	10404651
e-ISSN	1532298X
Journal	The Plant Cell
Issue Number	9
Volume Number	15
Language	English
Publisher	American Society of Plant Biologists
Publisher Date	2003-08-01
Access Restriction	Open
Rights Holder	American Society of Plant Biologists
Subject Keyword	Plant Science Cell Biology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Cell Biology Plant Science

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