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Self-incompatibility in Eucalyptus globulus ssp globulus (Myrtaceae)


Pound, LM and Wallwork, MAB and Potts, BM and Sedgley, M, Self-incompatibility in Eucalyptus globulus ssp globulus (Myrtaceae), Australian Journal of Botany, 50, (3) pp. 365-372. ISSN 0067-1924 (2002) [Refereed Article]

DOI: doi:10.1071/BT01076


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.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Genetics
Research Field:Genetics not elsewhere classified
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Native forests
UTAS Author:Potts, BM (Professor Brad Potts)
ID Code:25133
Year Published:2002
Web of Science® Times Cited:38
Deposited By:Plant Science
Deposited On:2002-08-01
Last Modified:2011-08-02

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