Xylem Development in the Gynoecium of the Apple (Malus pumila L.) Cv, Cox's Orange Pippin |
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Authors: | K. A. D., MACKENZIE J. COSTA, TURA |
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Affiliation: | Breeding and Genetics Department, Plant Science Division, British Society for Horticultural Research East Mailing, Maidstone, Kent ME19 6BJ, UK |
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Abstract: | Lignification of the xylem within the carpellary bundles ofapple flowers spreads acropetally from a point 9001400µm below the base of the locules. At the same time, anotherwave of lignification spreads basipetally from a point justbelow the stigma. The acropetal spread at first progresses morequickly, but at later stages the number of lignified xylem elementsjust below the stigma increases rapidly, reaching a peak justas the flower opens. This increase is very localized and thenumber declines greatly within only 25% of the stylar distancebelow the stigma. Lignification of the xylem in the bundlesserving other flower parts precedes that serving the gynoecium,and spreads basipetally from a point above the base of the locules. Malus pumila L, anatomy, apple, carpel, Cox's Orange Pippin, development, flower, gynoecium, pedicel, pistil, stigma, style, vasculature, xylem |
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