Structural and cytochemical characteristics of the stigma and style in Vitis vinifera L. var. Sangiovese (Vitaceae)
1996
Ciampolini, F. | Faleri, C. | Di Pietro, D. | Cresti, M.
Studies were carried out on structural and cytochemical aspects of the stigma and style of Vitis vinifera. The stigma is of the wet papillate type with a continuous cuticle and pellicle. During the development of the papillae, the cell walls increase in thickness and produce a secretion product constituted of lipids that pass through the wall forming the exudate. The style is solid with a central core of transmitting tissue which has conspicuous intercellular spaces that increase remarkably from the periphery to the centre where the cuticle is present. The intercellular spaces, where the pollen tubes grow, contain a matrix that includes polysaccharides, pectic substances and scattered areas of lipidic nature.
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