Title: Partitioning of 14C-assimilate in Easter Lily as affected by growth stage and flower removal
Abstract: Three weeks before anthesis, flower buds of Easter Lily plants received 47 and 12% of 14C translocated from Leaf 5 (upper) and 25 (middle), respectively, whereas the bulb received 5 and 52%, respectively. Flower bud removal increased the fraction in the bulb to 52% (Leaf 5) and 63% (Leaf 25). At anthesis, the flowers received 78% (Leaf 5) and 65% (Leaf 25) of translocated 14C-assimilate, nearly all of which was in the second flower which was still expanding. Less than 5% of the 14C from either leaf moved to the bulb in intact flowering plants, but upon flower removal, the bulb received 26 and 59% of the labelled assimilate from Leaf 5 and 25, respectively. Five weeks after anthesis, nearly 85% of the 14C-assimilate from either leaf was in the bulb. The fraction of 14C moving into the daughter bulb increased from less than 10%, 3 weeks before, to over 50%, 5 weeks after anthesis. Regardless of treatment, sink activity of the daughter scales was 2- to 12-fold higher than that of the mother scales. Although much of the current assimilate from the upper half of the intact lily shoot moves to flowers before anthesis, flower-bud removal is an effective way to increase carbon supply to the bulb.
Publication Year: 1986
Publication Date: 1986-07-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 22
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