Cell cycle genes are activated earlier than respiratory genes during release of grapevine buds from endodormancy

Plant Signaling & Behavior
Ximena Noriega, Francisco J Pérez

Abstract

Single-bud cuttings of Vitis vinifera L exposed to forced growing conditions were used to investigate the involvement of phytohormones, abscisic acid (ABA), auxin (Aux) and cytokinin (CK) in the release of buds from the ED and in bud-sprouting. This artificial system imitates and hastens the natural sprouting that occurs in spring. Temporal expression analysis of genes related to phytohormones synthesis, showed an early drop in the expression of ABA biosynthesis gene that preceded an increase in Aux and CK biosynthesis genes. Bud-break is headed by the activation of all structures of the latent bud, especially the differentiation of the inflorescence and the development of the early stages of floral organs. Therefore, resumption of cell division and increases in respiration are essential for the activation of the bud. Temporal expression analysis of the cell cycle and respiration genes indicate that an increase in cell division go before the increase in respiration. These results, together with results indicating that the cell cycle genes are upregulated by Aux and CK, suggest that the events before the bud-break, start with a reduction in ABA content, followed by an increase in the content of Aux and CK, which activates the ma...Continue Reading

References

Jul 1, 2006·Molecular and Cellular Biology·Toshiyuki SakamakiRichard Pestell
Feb 5, 2008·Nature Genetics·Edward Owusu-AnsahUtpal Banerjee
May 30, 2008·Journal of Experimental Botany·G LebonC Clément
Jun 28, 2008·Cell Cycle·Stefan M SchiekeToren Finkel
Jul 4, 2008·Journal of Experimental Botany·María José CarmonaMark R Thomas
Jul 21, 2009·Proceedings of the National Academy of Sciences of the United States of America·Kasturi MitraJennifer Lippincott-Schwartz
Apr 22, 2014·Developmental Cell·Zhaoqing WangJian Jian Li
Jul 1, 2003·Functional Plant Biology : FPB·Paul K BossMark R Thomas

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