- Reproductive success and sex variation in nectarless and rewarding or…
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Reproductive success and sex variation in nectarless and rewarding orchids

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    0029136 - ÚVGZ 2006 RIV US eng J - Článek v odborném periodiku
    Jersáková, Jana - Kindlmann, Pavel
    Reproductive success and sex variation in nectarless and rewarding orchids.
    [Reprodukční úspěch a variace genderu u orchidejí.]
    International Journal of Plant Sciences. Roč. 165, - (2004), s. 779-785. ISSN 1058-5893. E-ISSN 1537-5315
    Grant CEP: GA AV ČR(CZ) IAA6087301; GA AV ČR(CZ) GA206/00/1124
    Výzkumný záměr: CEZ:AV0Z6087904
    Klíčová slova: orchids
    Kód oboru RIV: EF - Botanika
    Impakt faktor: 1.752, rok: 2004

    In hermaphroditic plants, the number of flowers in the inflorescence and the presence of a reward may have a differential effect on male and female reproductive success and thus on the evolution of floral features. Two rewarding and one nectarless orchid species were used here to test the hypothesis that a large inflorescence serves primarily to increase male reproductive success. We have found that both in rewarding and in nectarless species, the rate of increase of male reproductive success with the number of flowers is not significantly different from that of female reproductive success, which does not support the male function hypothesis. Since the lack of reward causes lower reproductive success in nectarless orchids, we hypothesized that in nectarless species, the average time interval between flower opening and its first visit by a pollinator is longer compared with rewarding ones. Our data confirmed this hypothesis.

    Reprodukční úspěch a variace genderu u orchidejí
    Trvalý link: http://hdl.handle.net/11104/0119012
     
     
Počet záznamů: 1  

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