Coordination between MIDASIN 1-mediated ribosome biogenesis and auxin modulates plant development
文献类型： 外文期刊
作者： Li, Ke 1 ; Zhou, Ximeng 1 ; Sun, Xueping 1 ; Li, Guanghui 1 ; Hou, Lei 1 ; Zhao, Shuzhen 1 ; Zhao, Chuanzhi 1 ; Ma, Chang 1 ;
作者机构： 1.Shandong Acad Agr Sci, Biotechnol Res Ctr, Jinan 250100, Peoples R China
2.Shandong Prov Key Lab Crop Genet Improvement Ecol, Jinan 250100, Peoples R China
3.Shandong Univ, Coll Life Sci, Qingdao 266237, Peoples R China
4.Shandong Normal Univ, Coll Life Sci, Jinan 250014, Peoples R China
关键词： Auxin; auxin polar transport; auxin response factors; auxin signaling; MDN1; ribosome biogenesis deficiency
期刊名称：JOURNAL OF EXPERIMENTAL BOTANY （ 影响因子：5.908； 五年影响因子：7.011 ）
ISSN： 0022-0957
年卷期： 2021 年 72 卷 7 期
页码：
收录情况： SCI
摘要： Ribosomes are required for plant growth and development, and ribosome biogenesis-deficient mutants generally display auxin-related phenotypes. Although the relationship between ribosome dysfunction and auxin is known, many aspects of this subject remain to be understood. We previously reported that MIDASIN 1 (MDN1) is an essential pre-60S ribosome biogenesis factor (RBF) in Arabidopsis. In this study, we further characterized the aberrant auxin-related phenotypes of mdn1-1, a weak mutant allele of MDN1. Auxin response is disturbed in both shoots and roots of mdn1-1, as indicated by the DR5:GUS reporter. By combining transcriptome profiling analysis and reporter gene detection, we found that expression of genes involved in auxin biosynthesis, transport, and signaling is changed in mdn1-1. Furthermore, MDN1 deficiency affects the post-transcriptional regulation and protein distribution of PIN-FORMED 2 (PIN2, an auxin efflux facilitator) in mdn1-1 roots. These results indicate that MDN1 is required for maintaining the auxin system. More interestingly, MDN1 is an auxin-responsive gene, and its promoter can be targeted by multiple AUXIN RESPONSE FACTORs (ARFs), including ARF7 and ARF19, in vitro. Indeed, in arf7 arf19, the auxin sensitivity of MDN1 expression is significantly reduced. Together, our results reveal a coordination mechanism between auxin and MDN1-dependent ribosome biogenesis for regulating plant development.
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