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The stigma (pl.: stigmas or stigmata) [1] is the receptive tip of a carpel, or of several fused carpels, in the gynoecium of a flower. Description. Stigma of a Tulipa species, with pollen. Closeup of stigma surrounded by stamens of Lilium 'Stargazer')
11 cze 2004 · Defines stigmas as uniquely water-permeant sites on the plant; proteins and lipids are involved in adhesion, hydration, and germination; dry stigmas are pollen compatibility sites, with selective support of pollen hydration and germination, whereas wet stigmas often are covered in exudates from apoptotic cells and block inappropriate ...
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.
stigma. 1. The receptive tip of the carpel, which receives pollen at pollination and on which the pollen grain germinates. The stigma is adapted to catch and trap pollen, either by combing pollen off visiting insects or by various hairs, flaps, or sculpturings.
The stigma is a specially adapted portion of the pistil modified for the reception of pollen. It may be feathery and branched or elongated, as in such wind-pollinated flowers as those of the grasses, or it may be compact and have a sticky surface. The ovary… Read More. In pollination. …the pistil’s receptive surface, the stigma.
The ability of the stigma to support germination of viable, compatible pollen. Receptive stigmas show the activity of several enzymes including esterases, peroxidases, and acid phosphatases (Dafni, 1992; Dafni and Maués, 1998).
