Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/89904
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Type: Journal article
Title: Carbon starved anther encodes a MYB domain protein that regulates sugar partitioning required for rice pollen development
Author: Zhang, H.
Liang, W.
Yang, X.
Luo, X.
Jiang, N.
Ma, H.
Zhang, D.
Citation: Plant Cell, 2010; 22(3):672-689
Publisher: American Society of Plant Biologists
Issue Date: 2010
ISSN: 1040-4651
1532-298X
Statement of
Responsibility: 
Hui Zhang, Wanqi Liang, Xijia Yang, Xue Luo, Ning Jiang, Hong Ma, and Dabing Zhang
Abstract: In flowering plants, sink tissues rely on transport of carbohydrates from photosynthetic tissues (sources) for nutrition and energy. However, how sugar partitioning in plants is regulated at the molecular level during development remains unknown. We have isolated and characterized a rice (Oryza sativa) mutant, carbon starved anther (csa), that showed increased sugar contents in leaves and stems and reduced levels of sugars and starch in floral organs. In particular, the csa mutant had reduced levels of carbohydrates in later anthers and was male sterile. The csa mutant had reduced accumulation of (14)C-labeled sugars in anther sink tissue. CSA was isolated by map-based cloning and was shown to encode an R2R3 MYB transcription factor that was expressed preferentially in the anther tapetal cells and in the sugar-transporting vascular tissues. In addition, the expression of MST8, encoding a monosaccharide transporter, was greatly reduced in csa anthers. Furthermore, CSA was found to be associated in vivo and in vitro with the promoter of MST8. Our findings suggest that CSA is a key transcriptional regulator for sugar partitioning in rice during male reproductive development. This study also establishes a molecular model system for further elucidation of the genetic control of carbon partitioning in plants.
Keywords: Oryza sativa
Rights: ©2010 American Society of Plant Biologists
RMID: 0030023481
DOI: 10.1105/tpc.109.073668
Appears in Collections:Agriculture, Food and Wine publications

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