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Reproductive success and sex variation in nectarless and rewarding orchids
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SYSNO ASEP 0029136 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Reproductive success and sex variation in nectarless and rewarding orchids Title Reprodukční úspěch a variace genderu u orchidejí Author(s) Jersáková, Jana (UEK-B) RID, SAI, ORCID
Kindlmann, Pavel (UEK-B) RID, ORCID, SAISource Title International Journal of Plant Sciences. - : University of Chicago Press - ISSN 1058-5893
Roč. 165, - (2004), s. 779-785Number of pages 7 s. Language eng - English Country US - United States Keywords orchids Subject RIV EF - Botanics R&D Projects IAA6087301 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) GA206/00/1124 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z6087904 - UEK-B Annotation 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. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2006
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