Pollen flow between connected and isolated flower patches

MM Kwak*, O Velterop

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    Abstract

    Pollen flow between artificial patches of Scabiosa columbaria (Dipsacaceae), mainly pollinated by syrphids, was studied in a seminatural environment. Three linearly arranged patches of 30 heads each were used. The central patch served both as pollen donor and receptor patch (complete flowers), the other two patches served only as receptor patches (emasculated flowers and female flowers). The central patch was connected over a distance of 25m with one receptor patch by a corridor of flowers. The plant species of the corridor varied: either S. columbaria female heads, S. columbaria male heads, Origanum vulgare inflorescences or Aster multiflorus heads were used. The corridor species shared visitors with S. columbaria. The second receptor patch was not connected with the donor patch and served as a control. Syrphid species did not differ in hop size (distance between two subsequently visited heads) if the corridor consisted of S. columbaria female heads. In the Aster corridor, syrphid species made larger hops than in the Scabiosa corridor. Despite the fact that a fair amount of pollen was deposited on the female heads in the corridor, pollen flow was increased significantly in 4 out of 10 experiments if the receptor patch was connected with a corridor containing S. columbaria male or female heads. In only one experiment a significant decrease in pollen deposition in the connected patch (connected with a female S. columbaria corridor) was observed. Pollen flow was significantly reduced in 2 out of 9 experiments with Aster or Origanum as corridor species and was increased significantly only once. A significant increase of heterospecific pollen deposition was observed if the corridor species was not conspecific.

    Original languageEnglish
    Title of host publicationPROCEEDINGS OF THE EIGHT INTERNATIONAL POLLINATION SYMPOSIUM POLLINATION: INTEGRATOR OF CROPS AND NATIVE PLANT SYSTEMS
    EditorsP Benedek, KW Richards
    Place of PublicationLEUVEN 1
    PublisherINTERNATIONAL SOCIETY HORTICULTURAL SCIENCE
    Pages41-45
    Number of pages5
    ISBN (Print)90-6605-765-3
    Publication statusPublished - 2001
    Event8th International Pollination Symposium - , Hungary
    Duration: 10-Jul-200014-Jul-2000

    Publication series

    NameACTA HORTICULTURAE
    PublisherINTERNATIONAL SOCIETY HORTICULTURAL SCIENCE
    ISSN (Print)0567-7572

    Other

    Other8th International Pollination Symposium
    CountryHungary
    Period10/07/200014/07/2000

    Keywords

    • corridor
    • syrphids
    • pollen flow
    • gene flow
    • Scabiosa columbaria

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