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Article

Transcriptome and Hormone Analyses Revealed Insights into Hormonal and Vesicle Trafficking Regulation among Olea europaea Fruit Tissues in Late Development

1
Plant Physiology, University of Extremadura, Avda de Elvas s/n, 06006 Badajoz, Spain
2
Plant Physiology, University of Vigo, Campus Lagoas-Marcosende, s/n, 36310 Vigo, Spain
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2020, 21(14), 4819; https://doi.org/10.3390/ijms21144819
Received: 21 May 2020 / Revised: 5 July 2020 / Accepted: 6 July 2020 / Published: 8 July 2020
Fruit ripening and abscission are the results of the cell wall modification concerning different components of the signaling network. However, molecular-genetic information on the cross-talk between ripe fruit and their abscission zone (AZ) remains limited. In this study, we investigated transcriptional and hormonal changes in olive (Olea europaea L. cv Picual) pericarp and AZ tissues of fruit at the last stage of ripening, when fruit abscission occurs, to establish distinct tissue-specific expression patterns related to cell-wall modification, plant-hormone, and vesicle trafficking in combination with data on hormonal content. In this case, transcriptome profiling reveals that gene encoding members of the α-galactosidase and β-hexosaminidase families associated with up-regulation of RabB, RabD, and RabH classes of Rab-GTPases were exclusively transcribed in ripe fruit enriched in ABA, whereas genes of the arabinogalactan protein, laccase, lyase, endo-β-mannanase, ramnose synthase, and xyloglucan endotransglucosylase/hydrolase families associated with up-regulation of RabC, RabE, and RabG classes of Rab-GTPases were exclusively transcribed in AZ-enriched mainly in JA, which provide the first insights into the functional divergences among these protein families. The enrichment of these protein families in different tissues in combination with data on transcript abundance offer a tenable set of key genes of the regulatory network between olive fruit tissues in late development. View Full-Text
Keywords: cell wall; endomembrane trafficking; olive; plant hormone; fruit ripening; transcriptomic comparative cell wall; endomembrane trafficking; olive; plant hormone; fruit ripening; transcriptomic comparative
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MDPI and ACS Style

Briegas, B.; Corbacho, J.; Parra-Lobato, M.C.; Paredes, M.A.; Labrador, J.; Gallardo, M.; Gomez-Jimenez, M.C. Transcriptome and Hormone Analyses Revealed Insights into Hormonal and Vesicle Trafficking Regulation among Olea europaea Fruit Tissues in Late Development. Int. J. Mol. Sci. 2020, 21, 4819. https://doi.org/10.3390/ijms21144819

AMA Style

Briegas B, Corbacho J, Parra-Lobato MC, Paredes MA, Labrador J, Gallardo M, Gomez-Jimenez MC. Transcriptome and Hormone Analyses Revealed Insights into Hormonal and Vesicle Trafficking Regulation among Olea europaea Fruit Tissues in Late Development. International Journal of Molecular Sciences. 2020; 21(14):4819. https://doi.org/10.3390/ijms21144819

Chicago/Turabian Style

Briegas, Beatriz, Jorge Corbacho, Maria C. Parra-Lobato, Miguel A. Paredes, Juana Labrador, Mercedes Gallardo, and Maria C. Gomez-Jimenez. 2020. "Transcriptome and Hormone Analyses Revealed Insights into Hormonal and Vesicle Trafficking Regulation among Olea europaea Fruit Tissues in Late Development" International Journal of Molecular Sciences 21, no. 14: 4819. https://doi.org/10.3390/ijms21144819

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