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11 cze 2004 · At maturity, the receptive surface of a stigma presents secretions and enzymes required for pollination. Some plants that separate male and female flowers (monoecious angiosperms) have been found to retain their stigmas in the functionally male flowers but to delay the maturation of these stigmas.
Stigma can play an active role in pollen discrimination and some self-incompatibility reactions, that reject pollen from the same or genetically similar plants, involve interaction between the stigma and the surface of the pollen grain.
24 maj 2023 · Pollen transfers from the anther of one flower to the stigma of another flower on the same plant. By using these different agents and methods, plants ensure that their pollen reaches the female parts of other plants, promoting genetic diversity and the continuation of their species.
Stigma is the part of a flower's pistil that receives pollen during fertilization. It plays a crucial role in the reproductive process by capturing pollen grains, which are essential for the fertilization of ovules.
12 maj 2006 · A novel stigma-specific class III peroxidase gene, SSP (stigma-specific peroxidase) expressed exclusively in the stigmas of Senecio squalidus L. (Asteraceae) has recently been identified. Expression of SSP is confined to the specialized secretory cells (papillae) that compose the stigma epidermis.
8 cze 2018 · The stigmas of flowering plants selectively recognize pollen from the same species in part through biochemical interactions.
