The degree of pollination of eight black currant (Ribes nigrum L.) cultivars situated on different positions in raceme
2002
Denisow, B.,Akademia Rolnicza, Lublin (Poland). Katedra Botaniki
The degree of pollination of the following cultivars of black currant (R. nigrum L.): Ben Alder, Ben Lomond, Ben Nevis, Ben Tirran, Ceres, Ojebyn, Titania and Triton were estimated in a 4-year study (1994-97) in Poland. The most pollen received stigmas from free-pollinated flowers. In the above mentioned conditions an average number of pollen per one stigma in the bottom flowers in raceme was 312 grains, 270 in the medium and 133 in the apical. Fewer pollen grains were observed when flowers were subjected to pollination with its own pollen by one bumblebee queen under net 142, 120, 77, respectively. The smallest number of pollen grains were in self pollination conditions: 94, 63, 49. Just like the manner of pollination and the position of flower in the raceme, weather conditions influenced the number of pollen grains on stigmas
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