Xenogamy (Greek xenos=stranger, gamos=marriage) is the transfer of pollen grains from the anther to the stigma of a different plant. This is the only type of cross pollination which during pollination brings genetically different types of pollen grains to the stigma.[1]
The term xenogamy (along with geitonogamy and autogamy) was first suggested by Kerner in 1876.[2]
Cross-pollination involves the transfer of pollen grains from the flower of one plant to the stigma of the flower of another plant.
The main characteristics which facilitate cross-pollination are:
Herkogamy: Flowers possess some mechanical barrier on their stigmatic surface to avoid self-pollination, e.g. presence of gynostegium and pollinia in Calotropis.
Dichogamy: Pollen and stigma of the flower mature at different times to avoid self-pollination.
Self-incompatibility: In same plants, the mature pollen fall on the receptive stigma of the same flower but fail to bring about self-pollination.
Male sterility: The pollen grains of some plants are not functional. Such plants set seeds only after cross-pollination.
Dioecism: Cross-pollination always occurs when the plants are unisexual and dioecious, i.e., male and female flowers occur on separate plants, e.g., papaya, some cucurbits, etc.
Heterostyly: The flowers of some plants have different lengths of stamens and styles so that self-pollination is not possible, e.g., Primula, Linum, etc.
^Biology textbook for XII. Nation Council of Educational Research and Training. 2006. p. 28. ISBN 81-7450-639-X.
^Darwin, Charles (August 2006). More Letters of Charles Darwin, Volume 2. Echo Library. p. 668. ISBN 978-1-4068-0482-9. Retrieved 25 February 2012.
Xenogamy (Greek xenos=stranger, gamos=marriage) is the transfer of pollen grains from the anther to the stigma of a different plant. This is the only type...
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Nitemute Over Over No Place Within Speedway Electronia Milan Slinky Android Siliconic Transportal Ecliptic Xenogamy Find Me So Fine Contact Storm v t e...
Over Puzzle Questions, Revealing Sensitivity to Uncommon Verbally Wayward Xenogamy, Yielding Zymosis”. In 1977, Pergamon Press, another Oxford based publisher...
is adapted to nototribic (dorsal) pollination. It can reproduce through xenogamy, geitonogamy, and autogamy. Plants that develop from seed appear and flower...
Guardian Unlimited. London. Retrieved 2008-02-03. Malini White (2003-05-05). "Xenogamy at Many Levels". The Hindu. Archived from the original on 2003-10-20. Retrieved...
per capsule and over 70,000 seeds per plant. There are some evidence of xenogamy, but potential pollinators were rarely observed. "Orobanche pinorum Geyer...
(Annonaceae): Assessing the efficacy of floral synchrony for promoting xenogamy. International Journal of Plant Sciences 176(4): 333–345 Gifford, E.M.;...
the order Diptera, Hymenoptera and Lepidoptera. It has been found that xenogamy in this species leads to more fruits per flower and more seeds in each...
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