Effect of repeated pollination upon filled seed in white spruce

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Abstract
Repeated pollinations with brush had very little effect on the production of filled seed and pollen from the first pollination was most likely to accomplish fertilization in white spruce (Piceaglauca (Moench) Voss). Based on the filled seed and the number of coloured pollen on the nucellus, it was suggested that pollinated ovules would stop exuding any pollination drops.

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