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Moriarty DJ, Hayward AC. Ultrastructure of bacteria and the proportion of Gram-negative bacteria in marine sediments. Microb Ecol. 1982;8(1):1-14doi: 10.1007/BF02011456.
Moriarty, D. J., & Hayward, A. C. (1982). Ultrastructure of bacteria and the proportion of Gram-negative bacteria in marine sediments. Microbial ecology, 8(1), 1-14. https://doi.org/10.1007/BF02011456
Moriarty, D J, and Hayward, A C. "Ultrastructure of bacteria and the proportion of Gram-negative bacteria in marine sediments." Microbial ecology vol. 8,1 (1982): 1-14. doi: https://doi.org/10.1007/BF02011456
Moriarty DJ, Hayward AC. Ultrastructure of bacteria and the proportion of Gram-negative bacteria in marine sediments. Microb Ecol. 1982 Jun;8(1):1-14. doi: 10.1007/BF02011456. PMID: 24225693.
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Microb Ecol. 1982 Jun;8(1):1-14. doi: 10.1007/BF02011456.

Ultrastructure of bacteria and the proportion of Gram-negative bacteria in marine sediments.

Microbial ecology

D J Moriarty, A C Hayward

Affiliations

  1. Division of Fisheries Research, CSIRO Marine Laboratories, P.O. Box 120, 4163, Cleveland, Qld, Australia.

PMID: 24225693 DOI: 10.1007/BF02011456

Abstract

Bacteria in sediments from the surface aerobic layer (0-1 cm) and a deeper anaerobic layer (20-21 cm) of a seagrass bed were examined in section by transmission electron microscopy. Bacteria with a Gram-negative ultrastructure made up 90% of bacteria in the surface layer, and Gram-positive bacteria comprised 10%. In the anaerobic zone, Gram-negative bacteria comprised 70% and Gram-positive bacteria 30% of the bacterial population. These differences were highly significant and support predictions of these proportions made from muramic acid measurements and direct counting with fluorescence microscopy. Most cells were enveloped in extracellular slime layers or envelopes, some with considerable structural complexity. The trophic value to animals of these envelopes is discussed. A unique organism with spines was observed.

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