| Summary: | The study was carried out to determine the effect of three different
temperatures (5, 15 and 25°C) on in vitro pollen germination and pollen tube
growth of five sour cherry cultivars: ‘Heimanns Konservenweichsel’,
‘Kelleriis 14’, ‘Oblačinska’, ‘Rexelle’ and ‘Šumadinka’. Pollen germination a
% agar % Temperature significantly affected pollen germination. High
germination rates (50-70%) were obtained at both 15°C and 25°C. Satisfactory
germination rates (42-51%) were also obtained at 5°C in some cultivars
(‘Rexelle’, ‘Šumadinka’ and ‘Heimanns Konservenweichsel’). The influence of
temperature on the pollen tube growth was more prominent. The length of
pollen tubes was three to six times higher at 15°C and 25°C in comparison
with 5°C. This has led to the conclusion that the temperature of 5°C,
although it could be adequate for pollen germination, is not high enough for
optimal pollen tube growth. was determined by germinating pollen grains in
culture medium containing 0.7agar-and 15sucrose. [Projekat Ministarstva nauke
Republike Srbije, br. TR-31063]
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