Spectral reflectance of Lemna gibba fronds exposed to ethylene glycol
In: Aquatic Botany. Elsevier Science: Tokyo; Oxford; New York; London; Amsterdam. ISSN 0304-3770; e-ISSN 1879-1522, more
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| Keywords |
Flora > Aquatic organisms > Aquatic plants
Spectra
Tests > Toxicity tests
Lemna gibba
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| Authors | | Top |
- Dong, W.
- Carter, G.A.
- Barber, J.T.
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| Abstract |
Spectroradiometry was used to quantify changes in duckweed frond reflectance that occurred throughout the 400-850 nm spectrum under various ethylene glycol (EG) concentrations and exposure times. The threshold concentration of EG at which a reflectance change could be detected was between 35 and 40 mM (P0.01), approximately, the same as by visual observation. EG-induced changes in frond reflectance were maximal at concentrations of 50 mM or greater. Reflectance changes were detectable within 24 h of exposure to 100 mM EG, 2-3 days prior to changes in frond appearance. Thus, spectroradiometry of duckweed may serve as a rapid and sensitive technique for detection of ecosystem exposure to EG and perhaps other stress agents. |
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