MORPHOLOGICAL ANALYSIS OF POLLEN OF THE GENUS PERSICA MILL. SPECIES

In the conditions of the Forest steppe zone of Ukraine the adverse meteorological phenomena is observed, as a result it exerts the dominating impact on peach's pollen development. Therefore the main task of current research was the generative features of genus Persica. The purpose – to study pollen micromorphological features of a surface the sort Persica Mill. representatives in the conditions of Forest steppe zone to show differences which could be used in identification of a genus. Objects of research – species of P. davidiana Carr. and P. vulgaris Mill. collections of the National botanical garden of M. M. Gryshko NAS of Ukraine. To carry out our research we used previously dried pollen. At research of morphological parameters we used scanning electronic microscopes of REMMA-102 of JSC SELMI (Sumy, Ukraine) and GSM-6700F (JEOL, Japan). For measurements of pollen grains we used the Axio Vision 40 V 4.8.2.0 (Carl Zeiss) licensed program. Sculptural elements of pollen are located meridionaly and in parallel, usually faltering, short and extended walls alternate with twisting fillets. Results of measurements of length of a polar axis and equatorial diameter showed that pollen grains of the studied species are characterized as big and vary in amount from 47.89 to 64.27 mkm on a polar axis and 25.60 to 34.74 mkm from the equatorial diameter. The average index of a form is in the range from 1.75 to 1.99 mkm which is smaller for P. davidiana (1.75–1.80). Comparative and morphological analysis of pollen of two peach species in conditions of the Forest steppe zone of Ukraine showed that qualitative signs of difference of pollen grains P. davidiana and P. vulgaris. First of all there are lack of perforation, a form and sculptural elements, and also quantitative: length of a polar axis and equatorial diameter. The statistical analysis of the received values and the allocated signs of studied peach genotypes allowed us to mark out some features which would be helpful at identification of pollen grains of different species.

peach, pollen, species, sculpture, exine, perforation

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