Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/12930
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Type: Journal article
Title: Self-incompatibility in Eucalyptus globulus ssp. globulus (Myrtaceae)
Author: Pound, Leanne Marie
Blesing, Meredith
Potts, Bradley Michael
Sedgley, Margaret
Citation: Australian Journal of Botany, 2002; 50 (3):365-372
Publisher: C S I R O Publishing
Issue Date: 2002
ISSN: 0067-1924
School/Discipline: School of Earth and Environmental Sciences
Statement of
Responsibility: 
L. M. Pound, M. A. B. Wallwork, B. M. Potts and M. Sedgley
Abstract: Controlled pollinations with self- and cross-pollen were applied to individual flowers of five mature Eucalyptus globulus Labill. ssp. globulus trees to investigate the site of action of the self-incompatibility mechanism. Growth of pollen tubes in styles at 2 weeks after pollination and ovule penetration by pollen tubes at 2 and 4 weeks after pollination were investigated by fluorescence microscopy. Some pollinated flowers were left to develop to seed maturity, then harvested to quantify the level of self-incompatibility of each tree. Trees ranged from 76 to 100% self-incompatible. There was no significant difference in the number of pollen tubes in the style between treatments although variation was present between trees. The number of pollen tubes present was similar to the number of ovules present within flowers. Penetration of ovules by pollen tubes over all five trees combined revealed no difference between treatments at 2 weeks after pollination; however, there was slightly greater penetration by cross-pollen tubes at 4 weeks after pollination. This difference was not large enough to account for the near complete lack of selfed-seed production, suggesting late pre- or post-zygotic arrest of selfed ovules.
Description: Copyright © 2002 CSIRO
RMID: 0020020811
DOI: 10.1071/BT01076
Appears in Collections:Wine Science publications

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