Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/50525
Título: Genome-wide analyses of mads-box genes in Humulus lupulus L. reveal potential participation in plant development, floral architecture, and lupulin gland metabolism
Palavras-chave: ABC model
Hop
Transcription factors
Type-II MADS box
Type-I MADS-box
Modelo ABC
Genes do tipo MADS-Box
Fatores de transcrição
Data do documento: Mai-2022
Editor: Multidisciplinary Digital Publishing Institute (MDPI)
Citação: GUTIÉRREZ, R. M. et al. Genome-wide analyses of mads-box genes in Humulus lupulus L. reveal potential participation in plant development, floral architecture, and lupulin gland metabolism. Plants, Basel, v. 11, n. 9, 2022. DOI: 10.3390/plants11091237.
Resumo: MADS-box transcription factors (TFs) are involved in multiple plant development processes and are most known during the reproductive transition and floral organ development. Very few genes have been characterized in the genome of Humulus lupulus L. (Cannabaceae), an important crop for the pharmaceutical and beverage industries. The MADS-box family has not been studied in this species yet. We identified 65 MADS-box genes in the hop genome, of which 29 encode type-II TFs (27 of subgroup MIKCC and 2 MIKC*) and 36 type-I proteins (26 α, 9 β, and 1 γ). Type-II MADS-box genes evolved more complex architectures than type-I genes. Interestingly, we did not find FLOWERING LOCUS C (FLC) homologs, a transcription factor that acts as a floral repressor and is negatively regulated by cold. This result provides a molecular explanation for a previous work showing that vernalization is not a requirement for hop flowering, which has implications for its cultivation in the tropics. Analysis of gene ontology and expression profiling revealed genes potentially involved in the development of male and female floral structures based on the differential expression of ABC homeotic genes in each whorl of the flower. We identified a gene exclusively expressed in lupulin glands, suggesting a role in specialized metabolism in these structures. In toto, this work contributes to understanding the evolutionary history of MADS-box genes in hop, and provides perspectives on functional genetic studies, biotechnology, and crop breeding.
URI: http://repositorio.ufla.br/jspui/handle/1/50525
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