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POLLEN TUBE GROWTH AND THE SITE OF THE INCOMPATIBILITY REACTION IN BRASSICA OLERACEA
Author(s) -
OCKENDON D. J.
Publication year - 1972
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1972.tb01952.x
Subject(s) - pollen tube , pollen , brassica oleracea , botany , major duodenal papilla , biology , pollination , anatomy
S ummary Unpollinated, cross‐pollinated and self‐pollinated stigmas of Brussels sprouts and kale were examined in a scanning electron microscope as fresh uncoated specimens. The stigmatic papillae are closely appressed in young stigmas, but are held apart in the mature stigma by the swollen bases of the papilla cells. Some self‐pollen tubes show obvious signs of inhibition by being very short, or by coiling over the surface of the papilla without penetrating it. Other self‐pollen tubes appear to behave like cross‐pollen tubes by producing tubes which penetrate papillae directly. The implications of these observations for the identification of the site of the incompatibility reaction are discussed.