| Literature DB >> 30573626 |
Beatriz Orosa-Puente1, Nicola Leftley2, Daniel von Wangenheim2, Jason Banda2, Anjil K Srivastava1, Kristine Hill2, Jekaterina Truskina2,3, Rahul Bhosale2, Emily Morris2, Moumita Srivastava1, Britta Kümpers2, Tatsuaki Goh2,4, Hidehiro Fukaki4, Joop E M Vermeer5,6, Teva Vernoux3, José R Dinneny7, Andrew P French2,8, Anthony Bishopp2, Ari Sadanandom9, Malcolm J Bennett10.
Abstract
Plants adapt to heterogeneous soil conditions by altering their root architecture. For example, roots branch when in contact with water by using the hydropatterning response. We report that hydropatterning is dependent on auxin response factor ARF7. This transcription factor induces asymmetric expression of its target gene LBD16 in lateral root founder cells. This differential expression pattern is regulated by posttranslational modification of ARF7 with the small ubiquitin-like modifier (SUMO) protein. SUMOylation negatively regulates ARF7 DNA binding activity. ARF7 SUMOylation is required to recruit the Aux/IAA (indole-3-acetic acid) repressor protein IAA3. Blocking ARF7 SUMOylation disrupts IAA3 recruitment and hydropatterning. We conclude that SUMO-dependent regulation of auxin response controls root branching pattern in response to water availability.Entities:
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Year: 2018 PMID： 30573626 DOI： 10.1126/science.aau3956
Source DB: PubMed Journal: Science ISSN： 0036-8075 Impact factor: 47.728