Journal Article

The <i>AtXTH28</i> Gene, a Xyloglucan Endotransglucosylase/Hydrolase, is Involved in Automatic Self-Pollination in <i>Arabidopsis thaliana</i>

Kasumi Kurasawa, Akihiro Matsui, Ryusuke Yokoyama, Tomoko Kuriyama, Takeshi Yoshizumi, Minami Matsui, Keita Suwabe, Masao Watanabe and Kazuhiko Nishitani

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 50, issue 2, pages 413-422
Published in print February 2009 | ISSN: 0032-0781
Published online January 2009 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pcp003
The AtXTH28 Gene, a Xyloglucan Endotransglucosylase/Hydrolase, is Involved in Automatic Self-Pollination in Arabidopsis thaliana

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  • Biochemistry
  • Molecular and Cell Biology
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Successful automatic self-pollination in flowering plants is dependent on the correct development of reproductive organs. In the stamen, the appropriate growth of the filament, which largely depends on the mechanical properties of the cell wall, is required to position the anther correctly close to the stigma at the pollination stage. Xyloglucan endotransglucosylase/hydrolases (XTHs) are a family of enzymes that mediate the construction and restructuring of xyloglucan cross-links, thereby controlling the extensibility or mechanical properties of the cell wall in a wide variety of plant tissues. Our reverse genetic analysis has revealed that a loss-of-function mutation of an Arabidopsis XTH family gene, AtXTH28, led to a decrease in capability for self-pollination, probably due to inhibition of stamen filament growth. Our results also suggest that the role of AtXTH28 in the development of the stamen is not functionally redundant with its closest paralog, AtXTH27. Thus, our finding indicates that AtXTH28 is specifically involved in the growth of stamen filaments, and is required for successful automatic self-pollination in certain flowers in Arabidopsis thaliana.

Keywords: Arabidopsis; Cell wall; Self-pollination; Stamen filament; XTH

Journal Article.  5226 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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