生物
染色质免疫沉淀
水稻
基因
染色质
发起人
遗传学
转录因子
激活剂(遗传学)
基因组
穗
基因表达
植物
作者
Zefu Lu,Hong Yu,Guosheng Xiong,Jing Wang,Yongqing Jiao,Guifu Liu,Yanhui Jing,Xiangbing Meng,Xueyuan Hu,Qian Qian,Xiang‐Dong Fu,Yonghong Wang,Jiayang Li
出处
期刊:The Plant Cell
[Oxford University Press]
日期:2013-10-01
卷期号:25 (10): 3743-3759
被引量:286
标识
DOI:10.1105/tpc.113.113639
摘要
IDEAL PLANT ARCHITECTURE1 (IPA1) is critical in regulating rice (Oryza sativa) plant architecture and substantially enhances grain yield. To elucidate its molecular basis, we first confirmed IPA1 as a functional transcription activator and then identified 1067 and 2185 genes associated with IPA1 binding sites in shoot apices and young panicles, respectively, through chromatin immunoprecipitation sequencing assays. The SQUAMOSA PROMOTER BINDING PROTEIN-box direct binding core motif GTAC was highly enriched in IPA1 binding peaks; interestingly, a previously uncharacterized indirect binding motif TGGGCC/T was found to be significantly enriched through the interaction of IPA1 with proliferating cell nuclear antigen PROMOTER BINDING FACTOR1 or PROMOTER BINDING FACTOR2. Genome-wide expression profiling by RNA sequencing revealed IPA1 roles in diverse pathways. Moreover, our results demonstrated that IPA1 could directly bind to the promoter of rice TEOSINTE BRANCHED1, a negative regulator of tiller bud outgrowth, to suppress rice tillering, and directly and positively regulate DENSE AND ERECT PANICLE1, an important gene regulating panicle architecture, to influence plant height and panicle length. The elucidation of target genes of IPA1 genome-wide will contribute to understanding the molecular mechanisms underlying plant architecture and to facilitating the breeding of elite varieties with ideal plant architecture.
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