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https://hdl.handle.net/2440/12232
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Type: | Journal article |
Title: | Use of FDA and flow cytometry to assess metabolic activity as an indicator of nutrient status in phytoplankton |
Author: | Brookes, J. Geary, S. Ganf, G. Burch, M. |
Citation: | Marine and Freshwater Research, 2000; 51(8):817-823 |
Publisher: | C S I R O Publishing |
Issue Date: | 2000 |
ISSN: | 1323-1650 1448-6059 |
Abstract: | This study reports the use of a technique to determine nutrient limitation of cultured and natural phytoplankton. The technique, an FDA-activity assay, which is usually used to assess cell viability, was used to measure metabolic activity in response to nutrient addition; the metabolic activity of phytoplankton was determined as the rate of hydrolysis of fluorescein diacetate (FDA), by intracellular esterases, to fluorescein, which was detectedusing a flow cytometer. Replacement of the limiting nutrient to nitrogen- or phosphorus-limited cultures and field populations resulted in an increase in metabolic activity that was detectable 24 h after nutrient addition. By flow cytometry, the natural phytoplankton community can be divided into different taxonomic groups; the response of these to FDA could be determined individually to allow identification of the nutrients limiting each type of phytoplankton. This would be more specific than the assessment of a whole-community response, which may mask subtle differences among taxa. |
Description: | © CSIRO 2000 |
DOI: | 10.1071/MF00048 |
Published version: | http://dx.doi.org/10.1071/mf00048 |
Appears in Collections: | Aurora harvest 7 Earth and Environmental Sciences publications Ecology, Evolution and Landscape Science publications Environment Institute Leaders publications |
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