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MICROAUTORADIOGRAPHIC STUDIES OF THE MARINE PHYCOBIONTS RHIZOSOLENIA AND RICHELIA 1
Author(s) -
Weare N. M.,
Azam F.,
Mague T. H.,
HolmHansen O.
Publication year - 1974
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.1529-8817.1974.tb02728.x
Subject(s) - biology , diatom , photosynthesis , heterotroph , botany , nitrogen , bacteria , genetics , physics , quantum mechanics
SUMMARY Microautoradiography was used to study photosynthetic and heterotrophic activities in cells of the diatom Rhizosolenia styliformis var. longispina containing the nitrogen‐fixing, endophytic, blue‐green alga Richelia intracellularis. In field studies with 14 C‐labeled bicarbonate, the blue‐green alga appeared to be actively photosynthesizing but the diatom did not. Neither Richelia nor Rhizosolenia assimilated, 3 H‐labeled acetate, glucose, or an amino acid mixture. The diatom lacked cytoplasmic streaming and appeared, to be in a senescent condition. Implications of these observations for the nature of this algal association are discussed.