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PcG proteins MSI1 and BMI1 function upstream of miR156 to regulate aerial tuber formation in potato

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dc.contributor.author KUMAR, AMIT en_US
dc.contributor.author KONDHARE, KIRTIKUMAR R. en_US
dc.contributor.author VETAL, PALLAVI VIJAY en_US
dc.contributor.author BANERJEE, ANJAN K. en_US
dc.date.accessioned 2019-08-26T06:52:59Z
dc.date.available 2019-08-26T06:52:59Z
dc.date.issued 2020-01 en_US
dc.identifier.citation Plant Physiology, 182(1), 185-203. en_US
dc.identifier.issn 1532-2548 en_US
dc.identifier.uri http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/3807
dc.identifier.uri https://doi.org/10.1104/pp.19.00416 en_US
dc.description.abstract Polycomb Repressive Complexes (PRC1 and PRC2) regulate developmental transitions in plants. AtBMI1, a PRC1 member, represses micro RNA156 (miR156) to trigger the onset of adult phase in Arabidopsis (Arabidopsis thaliana). miR156 overexpression (OE) reduces below-ground tuber yield, but stimulates aerial tubers in potato (Solanum tuberosum ssp andigena) under short-day (SD) photoperiodic conditions. Whether PRC members could govern tuber development through photoperiod-mediated regulation of miR156 is unknown. Here, we investigated the role of two PRC proteins, StMSI1 (PRC2 member) and StBMI1-1, in potato development. In wild-type andigena plants, StMSI1 and miR156 levels increased in stolon, whereas StBMI1-1 decreased under SD conditions. StMSI1-OE and StBMI1-1-antisense (AS) lines produced pleiotropic effects, including altered leaf architecture/compounding and reduced below-ground tuber yield. Notably, these lines showed enhanced miR156 accumulation accompanied by aerial stolons and tubers from axillary nodes, similar to miR156-OE lines. Further, grafting of StMSI1-OE or StBMI1-1-AS on wild-type stock resulted in reduced root biomass and showed increased accumulation of miR156a/b and -c precursors in the roots of wild-type stocks. RNA-sequencing of axillary nodes from StMSI1-OE and StBMI1-1-AS lines revealed downregulation of auxin and brassinosteroid genes, and upregulation of cytokinin transport/signaling genes, from 1,023 differentially expressed genes shared between the two lines. Moreover, we observed downregulation of genes encoding H2A-ubiquitin ligase and StBMI1-1/3, and upregulation of Trithorax group H3K4-methyl-transferases in StMSI1-OE. Chromatin immunoprecipitation-quantitative PCR confirmed H3K27me3-mediated suppression of StBMI1-1/3, and H3K4me3-mediated activation of miR156 in StMSI1-OE plants. In summary, we show that cross talk between histone modifiers regulates miR156 and alters hormonal response during aerial tuber formation in potato under SD conditions. en_US
dc.language.iso en en_US
dc.publisher Oxford University Press en_US
dc.subject Biology en_US
dc.subject TOC-AUG-2019 en_US
dc.subject 2020 en_US
dc.subject 2020 en_US
dc.title PcG proteins MSI1 and BMI1 function upstream of miR156 to regulate aerial tuber formation in potato en_US
dc.type Article en_US
dc.contributor.department Dept. of Biology en_US
dc.identifier.sourcetitle Plant Physiology en_US
dc.publication.originofpublisher Foreign en_US


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