Abstract
RECENTLY reports have been published of microscopic particles moving along strands in the sieve tubes of cut sections of Primula obconica1,2. This movement has suggested that protoplasmic streaming may be the mechanism of transport of sugars in the phloem of higher plants and it therefore seemed important to see whether such streaming could actually be observed in intact sieve tubes at rates sufficient to account for the velocity at which sugar is known to be moved.
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FENSOM, D., CLATTENBURG, R., CHUNG, T. et al. Moving Particles in Intact Sieve Tubes of Heracleum mantegazzianum. Nature 219, 531–532 (1968). https://doi.org/10.1038/219531a0
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DOI: https://doi.org/10.1038/219531a0
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