Researches regarding some features of apple pollen tubes

Abstract

The pollen tubes are not always appropriate in pistil penetrating. The object of this work is to present two types of “features” that occur during the pollen germination process in vitro at some apple varieties like Pionier and Generos regarding the development and the pollen tube aspect in experimental conditions on different culture media. The manifestation of these “features” was observed on other additional experiments of apple varieties which suggests that it is an “anomaly germination”, especially dependent on the species and it is not just a characteristic of the variety own. The microscopic examination of pollen germination analysis was performed by transmitted light and in phase contrast for highlighting of the pollen tubes and pollen nucleus. This kind of germination was observed in three replicates at the rate of 1 to 5%.