Functional reproductive biology of the basal angiosperms  Sarcandra glabra and Chloranthus japonicus (Chloranthaceae) and Amborella trichopoda (Amborellaceae).
Published: 2006
Language: eng
Number of pages: 117
ISBN-13: 9780494160701
Description: The structure and composition of the transmitting tissue extracellular matrix of the basal angiosperm taxa Amborellaceae and Chloranthaceae were characterized. The stigma of species in all three taxa were of the dry type comprised of a lamellate cuticle overlying a cuticular layer and primary wall containing components important in angiosperm pollen adhesion, hydration, and germination, including high and low methylesterified homogalacturonans, arabinogalactans/arabinogalactan proteins, and lipids. Assessment of pollen tube growth in the Chloranthaceae demonstrated that pollen tubes grew intercellularly en route to the ovary locule following germination and that stigmatic self-incompatibility may be present. Data challenges traditional views regarding transmitting tissue traits present during the origins and early history of angiosperms that (1) the first angiosperm stigma was of the wet type; (2) pollen tubes grew extracellularly towards ovules in free-flowing exudates at the stigma and site of angiospermy; and (3) self-incompatibility mechanisms first evolved at the site of angiospermy.
Notes: Source: Masters Abstracts International, Volume: 44-06, page: 2680.

Thesis (M.Sc.)--University of Toronto, 2006.

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