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(American Journal of Botany. 2003;90:675-682.)
© 2003 Botanical Society of America, Inc.

Genetics and Molecular Biology

Characterization and localization of short-specific polygalacturonase in distylous Turnera subulata (Turneraceae)1

A. Athanasiou2, D. Khosravi, F. Tamari and J. S. Shore3

Department of Biology, York University, 4700 Keele Street, Toronto, Ontario M3J 1P3 Canada

We describe for distylous Turnera subulata a polygalacturonase specific to short-styled plants that is localized to the style transmitting tissue (the tissue through which pollen tubes grow). The polygalacturonase gene is linked to and may be upregulated by the S allele of the distyly locus. Because of its tissue-specific location, the polygalacturonase may be involved in the self-incompatibility response, acting in a complementary or antagonistic manner, or possibly in signalling downstream events. A pollen-specific polygalacturonase was also identified and may be a member of a small multigene family of pollen polygalacturonases. The role, if any, played by the pollen polygalacturonase in distyly, is presently unknown.

Key Words: distyly • heterostyly • immunocytochemistry • polygalacturonase • transmitting tissue • Turnera • Turneraceae




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S. Truyens, M. M. Arbo, and J. S. Shore
Phylogenetic relationships, chromosome and breeding system evolution in Turnera (Turneraceae): inferences from its sequence data
Am. J. Botany, October 1, 2005; 92(10): 1749 - 1758.
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