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• W2100196739 abstract "BackgroundThe characteristics of pollen tube growth are not constant, but display distinct patterns of growth within the different tissues of the pistil. In the stigma, the growth rate is slow and autotrophic, whereas in the style, it is rapid and heterotrophic. Very little is known about the interactions between these distinct maternal tissues and the traversing pollen tube and the role of this interaction on the observed metabolism. In this work we characterise pollen tube growth in the apple flower and look for differences in glycoprotein epitope localization between two different maternal tissues, the stigma and the style.ResultsWhile immunocytochemically-detected arabinogalactan proteins were present at high levels in the stigma, they were not detected in the transmitting tissue of the style, where extensins were abundant. Whereas extensins remained at high levels in unpollinated pistils, they were no longer present in the style following pollen tube passage. Similarily, while abundant in unpollinated styles, insoluble polysaccharides such as β-glucans, were depleted in pollinated pistils.ConclusionsThe switch from autotropic to heterotrophic pollen tube growth correlates spatially with a change of glycoprotein epitopes between the stigma and the style. The depletion of extensins and polysaccharides following pollen tube passage in the style suggest a possible contribution to the acceleration of heterotrophic pollen tube growth, which would imply an active contribution of female tissues on prezygotic male–female crosstalk." @default.
• W2100196739 created "2016-06-24" @default.
• W2100196739 creator A5026803760 @default.
• W2100196739 creator A5035053080 @default.
• W2100196739 date "2014-01-01" @default.
• W2100196739 modified "2023-10-10" @default.
• W2100196739 title "Glycoprotein composition along the pistil of Malus x domestica and the modulation of pollen tube growth" @default.
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• W2100196739 doi "https://doi.org/10.1186/1471-2229-14-1" @default.
• W2100196739 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3890559" @default.
• W2100196739 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24387633" @default.
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