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dc.creatorSantos, Iasminy Silva-
dc.creatorRibeiro, Thales Henrique Cherubino-
dc.creatorOliveira, Kellen Kauanne Pimenta de-
dc.creatorSantos, Jacqueline Oliveira dos-
dc.creatorMoreira, Rafael Oliveira-
dc.creatorLima, Renato Ribeiro-
dc.creatorLima, André Almeida-
dc.creatorChalfun Junior, Antonio-
dc.identifier.citationSANTOS, I. S. et al. Multigenic regulation in the ethylene biosynthesis pathway during coffee flowering. Physiology and Molecular Biology of Plants, [S.I.], v. 28, p. 1657-1669, Sept. 2022. DOI:
dc.description.abstractEthylene regulates different aspects of the plant’s life cycle, such as flowering, and acts as a defense signal in response to environmental stresses. Changes induced by water deficit (WD) in gene expression of the main enzymes involved in ethylene biosynthesis, 1-aminocyclopropane-1-carboxylic acid synthase (ACS) and oxidase (ACO), are frequently reported in plants. In this study, coffee (Coffea arabica) ACS and ACO family genes were characterized and their expression profiles were analyzed in leaves, roots, flower buds, and open flowers from plants under well-watered (WW) and water deficit (WD) conditions. Three new ACS genes were identified. Water deficit did not affect ACS expression in roots, however soil drying strongly downregulated ACO expression, indicating a transcriptional constraint in the biosynthesis pathway during the drought that can suppress ethylene production in roots. In floral buds, ACO expression is water-independent, suggesting a higher mechanism of control in reproductive organs during the final flowering stages. Leaves may be the main sites for ethylene precursor (1-aminocyclopropane-1-carboxylic acid, ACC) production in the shoot under well-watered conditions, contributing to an increase in the ethylene levels required for anthesis. Given these results, we suggest a possible regulatory mechanism for the ethylene biosynthesis pathway associated with coffee flowering with gene regulation in leaves being a key point in ethylene production and ACO genes play a major regulatory role in roots and the shoots. This mechanism may constitute a regulatory model for flowering in other woody species.pt_BR
dc.publisherSpringer Naturept_BR
dc.sourcePhysiology and Molecular Biology of Plantspt_BR
dc.subjectACC oxidasept_BR
dc.subjectACC synthasept_BR
dc.subjectCoffea arabicapt_BR
dc.subjectWater defcitpt_BR
dc.subjectCafé - Maturaçãopt_BR
dc.subjectDéficit hídricopt_BR
dc.titleMultigenic regulation in the ethylene biosynthesis pathway during coffee floweringpt_BR
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