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Arabidopsis ORGAN SIZE RELATED Genes Regulate Organ Growth and Final Organ Size

【摘要】:正The growth of an organ in plants up to its characteristic size entails coordinative regulation of cell proliferation and expansion,but the mechanism underlying such regulation remains largely elusive.Here,we describe an Arabidopsis gene ORGAN SIZE RELATED1(OSR1) that regulates cell proliferation and expansion during organ growth in cooperation with ARGOS and ARGOS-LIKE(ARL).Ectopic expression of OSR1 in Arabidopsis leads to enlarged organs,due to an increase in both cell number and cell size,and disruption of OSR1,ARGOS and ARL results in smaller lateral

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