Ultrastructure of the stigma and style of Mangifera indica L.

The stigma of Mangifera indica L. is non-papillate and wet, with the style semi-solid. The exudate of the stigma and style is of the mixed type and is transported from vesicles in the secretory cells, via plasmatubules, to the surrounding cell walls. Cell walls of the transmitting tissue of the stigma and style are bilayered. The outer wall layer is typically reticulate and the exudate accumulates between the loosely woven wall fibrils. At the base of the style a specialized obturator, the ponticulus, facilitates the direct passage of the growing pollen tubes towards the embryo sac. Die Stempel van Mangifera indica L. is papilagtig en nat, en die styl is semi-solied. Die sekreet van die Stempel en styl is van die gemengde tipe en word vanaf vesikels in die sekreterende selle via plasmatubules na die omliggende selwande vervoer. Die selwande van die geleidingsweefsel van die Stempel en styl is twee-lagig. Die buitenste selwandlaag is tipies geretikuleerd en die sekreet versamel tussen die los fibrille van hierdie selwandlaag. ’n Gespesialiseerde obturator, die pontikulus, kom aan die basis van die styl voor en bevorder die deurgang van die stuifmeelbuise na die embriosak.