xenogamy


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Related to xenogamy: xenogeny, xerarch

xenogamy

[zə′näg·ə·mē]
(botany)
Cross-fertilization between flowers on different plants.
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The automatic self-pollination can hinder cross-pollination pollen tube growth, owing to competition with the autogamic pollen tubes, thus reducing xenogamy rate (MAHORO, 2003; SILVA; PINHEIRO, 2009).
All flowers used for the study of manual self-pollination, geitonogamy and xenogamy initiated the ovary development, though in some treatments there was subsequent abortion.
Genus Floral sex/Breeding system References Tillandsia Hermaphrodite/ Xenogamy, Gilmartin & Brown, Cleistogamy 1985; Gardner, 1986 Hechtia, Dyckia, Unisexual, bisexual/ Benzing, 2000; Cottendorfia, Polygamomonoecy, monoecy, Lenz, 1995; Lindmania xenogamy Ramirez et al.
It is clear that xenogamy is not specifically promoted by this enantiostylous mechanism, since all the plants ofa population present both floral morphs in an approached ratio 1:1.
The force of inbreeding depression in evolutionary time is evident in the shift from partial autogamy to almost complete xenogamy in escaped cultivars of P.
The three manual pollination treatments were: (1) geitonogamy, in which pollen was transferred from flowers of an unmarked raceme to a recipient flower on the same plant; (2) xenogamy, in which flowers of the treatment raceme received pollen from another donor plant from within the same seed accession location as the recipient plant; (3) distant xenogamy, in which flowers of the treatment raceme received pollen from donor plants belonging to a different Ecoregion than that of the recipient flowers (Table 2, Fig.
Flowers are non-autogamous but they are self-compatible (100%), and geitonogamy and xenogamy could exist (100% each) (Flores-Palacios 1995).
In population C, pollinivorous insects, aided by wind pollination (Gomez and Zamora 1996), registered high pollination rates and an increase in the quantity of seeds produced by xenogamy.