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The effect of pollination on ethylene evolution and ACC content in different parts of petunia flowers

Anna Mareczek, Zdzisław Piskornik

Department of Plant Physiology
Faculty of Horticulture, Agricultural University
29 Listopada 54, 31-425 Kraków, Poland

Ethylene evolution and content of 1-aminocyclopropane-1-carboxylic acid (ACC) in different parts of pollinated and non-pollinated petunia flowers at four stages of development and senescence were determined.

The greatest amounts of ethylene were produced by the pistil, divided into the stigma, the upper and basal parts of the style, and the ovary, isolated from pollinated flowers. The level of ACC was also high in these parts. An increase in ACC content and ethylene production in the pollinated stigma suggests the participation of this hormone in processes occurring in the pistil after pollination. Considerable differences in the amount of ethylene produced by the corolla and the pistil show that these parts of petunia flowers differ greatly in their sensitivity to this hormone.

Mareczek A., Piskornik Z., 1994. The effect of pollination on ethylene evolution and ACC content in different parts of petunia flowers. Folia Horticulturae VI/2: 45-54.