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The production of small closed flowers that are self-pollinating and contain numerous seeds.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



the self-pollination and self-fertilization of plants with usually small, plain, closed (cleistogamous) blossoms.

Cleistogamous flowers have little pollen. The pollen either falls onto the stigma in the closed blossom or, more rarely, germinates in the anthers, pierces their walls, and grows into the pistil. Cleistogamy is observed in plants of various families, including Arachis, many violets, impatiens, chickweed, toadflax, wood sorrel, and barley. Under favorable conditions cross-pollination is also sometimes observed in typically cleistogamous plants (for example, in some violets).

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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virgilioides are visited by a variety of animals with a great potential to pollinate, the dynamics of flower's opening allows the transfer of pollen grains to the stigma through of the automatic self-pollination. This process promotes the fruit set, since this species is self compatibility.
Control Ovule/flower 8.2 [+ or -] 1.32 N = 25 Pollen grains/stigma 36.0 N = 25 Seed/fruit 3.5 [+ or -] 1.63 N = 26 Seed/ovule 0.43 Fruit/Flower 0.13 N = 114 Fecundity rate 0.056 Bagged flowers (automatic self-pollination) Ovule/flower Pollen grains/stigma 28.4 N = 25 Seed/fruit 3.9 [+ or -] 1.96 N = 25 Seed/ovule 0.47 Fruit/Flower 0.2 N = 201 Fecundity rate 0.096
The level of automatic self-pollination, cross-compatibility, rate of pistil maturation, and total number of flowers showed no change associated with the change in autogamy (Table 3).

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