Phagotrophy of fluorescently labeled bacteria by an oceanic phytoplankter
Keller, M. D. ; Shapiro, L. P. ; Haugen, E. M. ; Cucci, T. L. ; Sherr, E. B. ; Sherr, B. F.
Springer
Published 1994
Springer
Published 1994
| ISSN: |
1432-184X
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|---|---|
| Source: |
Springer Online Journal Archives 1860-2000
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| Topics: |
Biology
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| Notes: |
Abstract Using fluorescently-labeled bacteria and detection by flow cytometry and epifluorescence microscopy, we demonstrate inducible mixotrophy in a marine photosynthetic flagellate, Ochromonas sp. (class Chrysophyceae). Phagotrophic uptake of bacteria increases under conditions of low or limiting light and nutrients, but deceases in periods of prolonged darkness; sustained phagotrophy may require light. In addition, this alga appears to discriminate between and preferentially ingest different types of bacteria. Although this clone is primarily photosynthetic, phagotrophy contributes to its nutrition, especially when light or nutrients limit photosynthesis.
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| Type of Medium: |
Electronic Resource
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| URL: |