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Histone Deacetylase 701 (HDT701) Induces Flowering in Rice by Modulating Expression of OsIDS1.

ABSTRACT: Rice is a facultative short-day (SD) plant in which flowering is induced under SD conditions or by other environmental factors and internal genetic programs. Overexpression of Histone Deacetylase 701 (HDT701) accelerates flowering in hybrid rice. In this study, mutants defective in HDT701 flowered late under both SD and long-day conditions. Expression levels of florigens Heading date 3a (Hd3a) and Rice Flowering Locus T1 (RFT1), and their immediate upstream floral activator Early heading date 1 (Ehd1), were significantly decreased in the hdt701 mutants, indicating that HDT701 functions upstream of Ehd1 in controlling flowering time. Transcript levels of OsINDETERMINATE SPIKELET 1 (OsIDS1), an upstream repressor of Ehd1, were significantly increased in the mutants while those of OsGI and Hd1 were reduced. Chromatin-immunoprecipitation assays revealed that HDT701 directly binds to the promoter region of OsIDS1. These results suggest that HDT701 induces flowering by suppressing OsIDS1.

SUBMITTER: Cho LH 

PROVIDER: S-EPMC6078857 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature

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<i>Histone Deacetylase 701 (HDT701)</i> Induces Flowering in Rice by Modulating Expression of <i>OsIDS1</i>.

Cho Lae-Hyeon LH   Yoon Jinmi J   Wai Antt Htet AH   An Gynheung G  

Molecules and cells 20180710 7

Rice is a facultative short-day (SD) plant in which flowering is induced under SD conditions or by other environmental factors and internal genetic programs. Overexpression of <i>Histone Deacetylase 701</i> (<i>HDT701</i>) accelerates flowering in hybrid rice. In this study, mutants defective in <i>HDT701</i> flowered late under both SD and long-day conditions. Expression levels of florigens <i>Heading date 3a</i> (<i>Hd3a</i>) and <i>Rice Flowering Locus T1</i> (<i>RFT1</i>), and their immediat  ...[more]

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