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中科院遗传与发育生物学所储成才研究组及其合作者通过对一水稻大粒显性突变体(Big grain1,Bg1-D)的研究,发现BG1编码一个受生长素特异诱导的早期响应的未知功能蛋白,在水稻茎和穗的维管组织中特异表达。有趣的是,BG1过量表达株系生长素极性运输能力显著增强,并导致水稻籽粒显著增大。田间试验表明,BG1过量表达株系与对照相
Chu Chengcai, a member of the Chinese Academy of Sciences in the genetics and developmental biology, and his collaborators found that BG1 encodes an unknown function of an early auxin-specific response induced by a large grain-dominant mutant of rice (Big grain1, Bg1-D) The protein is specifically expressed in the vascular tissue of rice stems and ears. Interestingly, the auxin-polar transport capacity of BG1 overexpressing lines significantly increased and resulted in a significant increase of rice grains. Field experiments showed that BG1 overexpression lines and controls