Plant and Cell Physiology Supplement
Abstract of the Annual Meeting of JSPP 2010
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Host: The Japanese Society of Plant Physiologists

GABA shunt regulates polarity along adaxial-abaxial axis
*Koichi Toyokura, Miyako Kusano, Keiro Watanabe, Toshiaki Tameshige, Kiyoshi Tatematsu, Ryuji Tsugeki, Noritaka Matsumoto, Kazuki Saito, Kiyotaka Okada
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Abstract
Most of higher plants have leaves with adaxial-abaxial polarity. Adaxial region is specified by adaxial-specific genes, whereas abaxial region is specified by abaxial-specific genes. However, it is still unknown how the expression patterns of adaxial-specific or abaxial-specific genes are established.
We analyzed novel adaxial-abaxial mutant, enlarged fil expression domain1 (enf1). enf1 mutant had some leaves which lost robustness of adaxial-abasial polarity. ENF1 gene encoded SUCCINIC SEMIALDEHYDE DEHYDEROGENASE (SSADH), which is one of GABA shunt enzymes. We analyzed another mutant of GABA shunt enzymes, gabat1> mutant. gabat1> mutant showed weak abaxializing phenotype and suppressed enf1. We will discuss how GABA shunt regulates the polarity along adaxial-abaxial axis.
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© 2010 by The Japanese Society of Plant Physiologists
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