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11 cze 2004 · In this review, we (1) survey recent discoveries of pollen and stigma functions both before and after they make contact, and (2) address the great diversity in pollen and stigma structures across taxa, focusing on how they accomplish key tasks in pollination.
11 lis 2021 · Number of distinct heterospecific pollen (HP) donor species found across all sampled stigmas in a community at a given sampling date as a function of the number of co-flowering plant species.
22 paź 2013 · In response to heat stress, plants synthesize a group of proteins called heat-shock proteins (HSPs), which act as molecular chaperones for other proteins. Interestingly, the olive stigma secretes HSP60, HSP70, and HSP90 proteins. Extracellular HSPs are emerging as important mediators in cell signalling in response to stress (Calderwood et al., 2007
5 paź 2021 · The main function of elongated cells of the stigma (called stigmatic papillae) is to trap pollen grains, thus mediating the fertilization of ovules enclosed within the fruit. In nga multiple mutants, the gynoecium produces normal ovaries (containing ovules) but completely lacks the style and stigmatic papillae, leading to fertility defects ...
26 gru 2022 · In this review, we examine its occurrence in the angiosperm phylogeny and investigate associations between plant reproductive traits and TSS. Prominent hypotheses regarding the evolution of TSS invoke the adaptive functions of outcrossing, pollination efficiency, and pollen germination.
1 lip 2013 · Pollen–stigma interaction is crucial for the reproductive success of flowering plants. Upon pollination, a cell to cell interaction occurs between the stigma papillae and pollen grains, leading to an exchange of chemical signals between the two.
Here we review our current understanding of the cellular and molecular interactions that mediate the earliest of these interactions between the pollen and the pistil that occur on or within the stigma – the ‘pollen–stigma interaction’.
