SummaryChanges in the ultrastructure of the red clover nectary during development and secretion are not very pronounced. The endoplasmic reticulum (ER) is fairly well developed throughout. The Golgi complex is slightly larger during the development stages. Nothing was found to support a hypothesis according to which secretion occurs through reverse pinocytosis. Some kind of active transport through the plasmalemma, involving a carrier system, seems more likely.
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Maria E. Eriksson (1977) studied this question.
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