title: Characterization and localization of short-specific polygalacturonase in distylous Turnera subulata (Turneraceae).
abstract: 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.
authors.affiliation: Department of Biology, York University, 4700 Keele Street, Toronto, Ontario M3J 1P3 Canada.
authors.forename: A
authors.initials: A
authors.lastname: Athanasiou
authors.forename: D
authors.initials: D
authors.lastname: Khosravi
authors.forename: F
authors.initials: F
authors.lastname: Tamari
authors.forename: J S
authors.initials: JS
authors.lastname: Shore