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TRANSLOCATION IN THE GIANT KELP MACROCYSTIS I. RATES, DIRECTION, QUANTITY OF C 14 ‐LABELED PRODUCTS AND FLUORESCEIN
Author(s) -
Parker Bruce C.
Publication year - 1965
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.1529-8817.1965.tb04554.x
Subject(s) - biology , phloem , sieve tube element , chromosomal translocation , kelp , frond , fluorescein , botany , photosynthesis , biophysics , fluorescence , biochemistry , optics , physics , gene
SUMMARY C 14 tracer and fluorescein dye experiments on translocation through the stipes of Macrocystis are reported. Both dye and C 14 ‐labeled products move mainly in the sieve tubes acropetally and basipetally in variable amounts and at variable rates, frequently entering young developing blades en route. The maximum rate of transport of organic products of photosynthesis may reach 65‐78 cm/hr, while that of fluorescein rarely exceeds 1.0 cm/hr in intact fronds. By their behavior, fluorescein and the C 1J ′‐labeled products(s) resemble phloem translocation in vascular plants.