The PLATZ Transcription Factor GL6 Affects Grain Length and Number in Rice
The PLATZ Transcription Factor GL6 Affects Grain Length and Number in Rice
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PLATZ 转录因子 GL6 影响水稻籽粒长度和数量
DOI：
10.1104/pp.18.01574
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发表时间：
2019-08-01
期刊：
影响因子：
7.4
通讯作者：
Han, Bin
中科院分区：
文献类型：
--
作者：
Wang, Ahong;Hou, Qingqing;Han, Bin
晶粒尺寸是决定籽粒产量的关键因素之一。虽然已经确定了许多控制水稻（Oryza sativa）晶粒大小的基因，但这一过程背后的整体调控网络仍然知之甚少。在此，我们报道了GL6数量性状的克隆和功能鉴定，该性状编码植物特异性的富含at序列和锌结合转录因子，调控水稻粒长和小穗数。GL6通过促进幼穗和籽粒的细胞增殖来控制粒长。gl6缺失突变体的籽粒较短，而gl6过表达突变体的籽粒较大，每穗粒数减少。研究表明，GL6通过与RNA聚合酶III亚基C53和转录因子C1相互作用，参与RNA聚合酶III转录机制，调控水稻籽粒发育相关基因的表达。我们的研究结果揭示了一个参与水稻粒度调节的进一步参与者，这可能在未来的水稻育种中被利用。
Grain size is one of the key determinants of grain yield. Although a number of genes that control grain size in rice (Oryza sativa) have been identified, the overall regulatory networks behind this process remain poorly understood. Here, we report the map-based cloning and functional characterization of the quantitative trait locus GL6, which encodes a plant-specific plant AT-rich sequence- and zinc-binding transcription factor that regulates rice grain length and spikelet number. GL6 positively controls grain length by promoting cell proliferation in young panicles and grains. The null gl6 mutant possesses short grains, whereas overexpression of GL6 results in large grains and decreased grain number per panicle. We demonstrate that GL6 participates in RNA polymerase III transcription machinery by interacting with RNA polymerase III subunit C53 and transcription factor class C1 to regulate the expression of genes involved in rice grain development. Our findings reveal a further player involved in the regulation of rice grain size that may be exploited in future rice breeding.