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- 저자 : Taramino, Graziana (검색결과 1 건)
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Kawakatsu, Taiji,Taramino, Graziana,Itoh, Jun-Ichi,Allen, Justin,Sato, Yutaka,Hong, Soon-Kwan,Yule, Ryan,Nagasawa, Nobuhiro,Kojima, Mikiko,Kusaba, Makoto,Sakakibara, Hitoshi,Sakai, Hajime,Nagato, Yasu Blackwell Publishing Ltd 2009 The Plant journal Vol.58 No.6
<P>Summary</P><P>Most aerial parts of the plant body are products of the continuous activity of the shoot apical meristem (SAM). Leaves are the major component of the aerial plant body, and their temporal and spatial distribution mainly determines shoot architecture. Here we report the identification of the rice gene <I>PLASTOCHRON3</I> (<I>PLA3</I>)/<I>GOLIATH</I> (<I>GO</I>) that regulates various developmental processes including the rate of leaf initiation (the plastochron). <I>PLA3</I>/<I>GO</I> encodes a glutamate carboxypeptidase, which is thought to catabolize small acidic peptides and produce small signaling molecules. <I>pla3</I> exhibits similar phenotypes to <I>pla1</I> and <I>pla2</I>– a shortened plastochron, precocious leaf maturation and rachis branch-to-shoot conversion in the reproductive phase. However, in contrast to <I>pla1</I> and <I>pla2</I>, <I>pla3</I> showed pleiotropic phenotypes including enlarged embryo, seed vivipary, defects in SAM maintenance and aberrant leaf morphology. Consistent with these pleiotropic phenotypes, <I>PLA3</I> is expressed in the whole plant body, and is involved in plant hormone homeostasis. Double mutant analysis revealed that <I>PLA1</I>, <I>PLA2</I> and <I>PLA3</I> are regulated independently but function redundantly. Our results suggest that PLA3 modulates various signaling pathways associated with a number of developmental processes.</P>
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