Floral Development on Is Associated with MADS-Box Transcription Factors through the Transcriptional Regulation of .

Plants (Basel)

Instituto de Ciencias Biológicas, Universidad de Talca, Talca 3460787, Chile.

Published: September 2023

Several grapevine ( L.) cultivars show a tendency to develop parthenocarpic seedless grapes, affecting fruit yield and quality. This reproductive disorder originates in defective ovule fertilization due to a failure in pollen tube growth. Zinc (Zn) is a crucial trace element, playing a vital role in various physiological and metabolic processes. It is particularly essential for the healthy growth of flowers and fruits. Insufficient zinc has been suggested as a potential reason for issues in this development process. This microelement is taken up through a mechanism that involves transporters, including the ZRT-IRT-like protein (ZIP) gene family, associated with the influx of Zn into the cell. In grapevines, 20 genes for ZIP-type transporters have been described. In this study, we analyzed the expression pattern of during flower development and employ transgenic methods to assess its transcriptional regulation. Furthermore, through computational examination of the promoter region, we identified two CArG boxes, recognized as responsive elements to MADS transcription factors. These factors play a key role in shaping various components of a flower, such as pollen. Our investigation of the promoter confirms the functionality of these CArG boxes. Overall, our results suggest that the increased expression of during flowering is likely under the influence of MADS transcription factors.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10535425PMC
http://dx.doi.org/10.3390/plants12183322DOI Listing

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