Peculiarities of pollen tube growth of Rhododendron racemosum french

Abstract

This paper is an extension of a previous study on the pollen morphology and germination potential of Rhododendron racemosum French. In this study are referred cytological aspects of process of pollen germination at this taxon. Was examined the growth of pollen tube length based on the concentration of sucrose in mediums, over a period of 192 hours after inoculation of pollen. The increase in length of the pollen tubes was in most cases directly proportional to level of the pollen germination capacity, in sense that the longest pollen tubes were formed on nutrient mediums which permit the bigest germination of the pollen tetrade. In this respect was demonstrated that the medium with 25% sucrose ensure the growth of the longest pollen tubes correlated with the style's length of flower from this genotype. Also highlights the formation stages of pollen tube, his longevity, anomalies in male gametophyte development to Rhododendron racemosum