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Post-Pollination Phenomena in Orchid Flowers. VI. Excised Floral Segments of Cymbidium

Joseph Arditti and Brigitta H. Flick
American Journal of Botany
Vol. 63, No. 2 (Feb., 1976), pp. 201-211
Stable URL: http://www.jstor.org/stable/2441701
Page Count: 11
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Post-Pollination Phenomena in Orchid Flowers. VI. Excised Floral Segments of Cymbidium
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Abstract

Whole Cymbidium Sw. (Orchidaceae) flowers, ones with their labella, gynostemia or perianth removed as well as excised ovaries, lips and columns, were pollinated, emasculated and treated with NAA and maintained in media containing or lacking NAA. The results indicate that, 1) the rostellar-stigmatic region seems to control many post-pollination phenomena, 2) auxin from the medium apparently does not reach the rostellum and/or stigma, 3) there is a certain interdependence among floral segments which exhibit post-pollination phenomena, and 4) once initiated, these phenomena may be subject to localized effects. These findings are taken as an indication that pollinated orchid flowers are a well-integrated system despite the diversity and number of observable phenomena.

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