Involvement of cytokinin response regulator RhRR1 in the control of flowering

• Autorzy: Wu L. , Feng M. , Jia Y. , Li H. , Liu Y. , Jiang Y.
• Języki publikacji: EN

Abstrakty

EN

Flowering at a suitable time is critical for ensuring reproductive success in the plant life cycle. The transition from vegetative growth to reproduction development is finely tuned by environmental and endogenous signals. To date, control of flowering involves five genetically defined pathways. However, the role of type-A response regulator genes in regulation of this process remains largely unclear. In the present study, we cloned and characterized a type-A response regulator gene (RhRR1) in rose. The expression of RhRR1 significantly increased in axillary bud during the transition from the vegetative growth to the start of floral differentiation, and in rose flowers in response to exogenous cytokinin or 1-methylcyclopropene (1-MCP) treatments, while that expression was markedly repressed by ethylene treatment. RhRR1 has the highest degree of sequence homology to AtARR8 and AtARR9, and is localized in the nucleus. Ectopic expression RhRR1 in Arabidopsis promoted early flowering, accompanied with the less rosette leaf number at bolting, and shorter bolting time after transferring the plants into pots. In addition, the expression of flowering regulatory genes in RhRR1 transgenic Arabidopsis, including FLOWERING LOCUS D, GA REQUIRING 1, LUMINIDEPENDENS, LEAFY, and TWIN SISTER OF FT clearly increased. These results allow us to infer that RhRR1 plays a key role in the control of flowering.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2019
• Tom: 41
• Numer: 07
• Opis fizyczny: Article 121 [9p.], fig.,ref.

Twórcy

autor

Wu L.

• Chongqing College Garden and Flower Engineering Research Center, Chongqing Engineering Research Center for Special Plant Seedlings, Institute of Special Plants, Chongqing University of Arts and Sciences, Yongchuan 402168, China

autor

Feng M.

• Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing 100193, China

autor

Jia Y.

• Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing 100193, China

autor

Li H.

• Collaborative Innovation Center of Special Plant Industry in Chongqing, Chongqing 402160, China

autor

Liu Y.

• Chongqing College Garden and Flower Engineering Research Center, Chongqing Engineering Research Center for Special Plant Seedlings, Institute of Special Plants, Chongqing University of Arts and Sciences, Yongchuan 402168, China

autor

Jiang Y.

• Chongqing Key Laboratory of Economic Plant Biotechnology, Chongqing 402160, China

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Identyfikatory

DOI

10.1007/s11738-019-2903-0