Translocation in red algae

摘要: Leucine-(U)-C(14) applied to the midrib of a young phylloid Delesseria sanguinea moves basipetally and acropetally eventually appears in other phylloids same plant. The highest velocity transport calculated was 63 cm/h. pathway movement seems be veins central core cauloid. Similar results had been obtained with Cystoclonium purpureum. Both algae belong Florideae axial cells. Observations light microscope revealed that proposed conducting elements (up 540 μm long) are interconnected by synapses having 1 4 "pit fields", which occur as very thin parts wall. Single pit fields structure lateral walls, connecting two rows mostly occluded slime-like material staining yellow iodine is attached one side synapsis. Conducting cells contain several nuclei small amount threadlike, branched rhodoplasts; they surrounded starch In cauloids have overwintered, depleted starch.