伊勢ツバキ林の花粉生産 : 花の花粉産出量

概要

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The pollen production of Camellia japonica flowers, in terms of grain number and dry weight, was studied for a c. 102 year old C. japonica stand located in Ise, Mie Prefecture. During the flowering period, in 2003, flower samples were taken from trees at the edge of the stand to determine the amount of pollen in the stamens, while to determine the number of stamens per flower, freshly fallen flowers were collected from the floor of the stand. The mean number of pollen grains per stamen for three measurements was 9,905. The mean pollen dry weight per stamen for 5 measurements was 0.7519mg, which was determined from the difference between the mean dry weight of anthers before and after pollen release. The mean single pollen grain dry weight, obtained by dividing the weight by the number of pollen grains per stamen for three measurements, was 78×10^<-6>mg. The mean number of stamens per flower for 6 measurements was 108.0. Therefore, the grain number and dry weight of pollen per flower was estimated to be 1.07×10^6 and 81.2mg, respectively. The numerical ratios of pollen grains to a single ovule (P/Ov ratios) were calculated to be 59-89×10^3, as there are 3 loculi per ovary and 4 to 6 ovules in each loculus.
日本花粉学会の論文
2006-06-30