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Wax-deficient anther1 Is Involved in Cuticle and Wax Production in Rice Anther Walls and Is Required
 

Summary: Wax-deficient anther1 Is Involved in Cuticle and Wax
Production in Rice Anther Walls and Is Required
for Pollen Development W
Ki-Hong Jung,a,1 Min-Jung Han,a Dong-yeun Lee,a Yang-Seok Lee,a Lukas Schreiber,b Rochus Franke,b
Andrea Faust,c Alexander Yephremov,c Heinz Saedler,c Yong-Woo Kim,d Inhwan Hwang,d and Gynheung Ana,e,2
a National Research Laboratory of Plant Functional Genomics, Division of Molecular and Life Sciences,
Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
b Institute of Cellular and Molecular Botany, University of Bonn, D-53115 Bonn, Germany
c Department of Molecular Genetics, Max Planck Institute for Breeding Research, D-50829 KoĻ ln, Germany
d Center for Plant Intracellular Trafficking and Division of Molecular and Life Sciences, Pohang University of Science
and Technology, Pohang 790-784, Republic of Korea
e Functional Genomic Center, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
In vegetative leaf tissues, cuticles including cuticular waxes are important for protection against nonstomatal water loss
and pathogen infection as well as for adaptations to environmental stress. However, their roles in the anther wall are rarely
studied. The innermost layer of the anther wall (the tapetum) is essential for generating male gametes. Here, we report the
characterization of a T-DNA insertional mutant in the Wax-deficient anther1 (Wda1) gene of rice (Oryza sativa), which shows
significant defects in the biosynthesis of very-long-chain fatty acids in both layers. This gene is strongly expressed in the
epidermal cells of anthers. Scanning electron microscopy analyses showed that epicuticular wax crystals were absent in
the outer layer of the anther and that microspore development was severely retarded and finally disrupted as a result of
defective pollen exine formation in the mutant anthers. These biochemical and developmental defects in tapetum found in

  

Source: An, Gynheung - Department of Life Science, Pohang University of Science and Technology

 

Collections: Biotechnology; Biology and Medicine