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Cytokinin-induced expression of OSH1 in a shoot-regenerating rice callus.

ABSTRACT: The expression of a KNOX class 1 gene OSH1 is induced by cytokinin during regeneration of shoots from callus in Oryza sativa L. (rice). This cytokinin-induced expression was enhanced by overexpression of homologues of cytokinin-signalling phosphorelay genes such as a histidine kinase gene OHK3, a phosphotransmitter gene OHP2 and a response regulator gene ORR1 in cultured cells. Regionally overlapped expression of these genes and OSH1 was observed in shoot apex. These results suggest that these cytokinin-signalling genes are positive regulators of the expression of OSH1, and mediate the OSH expression upon shoot regeneration from callus in rice.

SUBMITTER: Naruse M 

PROVIDER: S-EPMC6879368 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature

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Cytokinin-induced expression of <i>OSH1</i> in a shoot-regenerating rice callus.

Naruse Masashi M   Takahashi Honami H   Kurata Nori N   Ito Yukihiro Y  

Plant biotechnology (Tokyo, Japan) 20180901 3

The expression of a <i>KNOX</i> class 1 gene <i>OSH1</i> is induced by cytokinin during regeneration of shoots from callus in <i>Oryza sativa</i> L. (rice). This cytokinin-induced expression was enhanced by overexpression of homologues of cytokinin-signalling phosphorelay genes such as a histidine kinase gene <i>OHK3</i>, a phosphotransmitter gene <i>OHP2</i> and a response regulator gene <i>ORR1</i> in cultured cells. Regionally overlapped expression of these genes and <i>OSH1</i> was observed  ...[more]

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