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1 October 2003 Effects of Methanol on Photosynthetic Processes and Growth of Lemna gibba
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Abstract

Effects of methanol on growth and photosynthetic activity of Lemna gibba exposed under continuous illumination were examined. As a higher plant, L. gibba appeared to be much more sensitive to methanol inhibitory effect compared with some algae (Theodoridou et al. [2002] Biochim. Biophys. Acta, 1573, 189–198). We found that stimulatory or inhibitory effects were strongly dependent on the methanol concentration and the time of exposure. When the exposure was up to 0.2% methanol, the growth rate of biomass was improved by 50%. However, stimulatory effect of methanol appeared to be smaller when plants were exposed for 48 h compared with 24 h. Increase in biomass induced by methanol was not based on the increase in primary photosynthetic process but rather on accommodation of energy dissipation during photosynthesis. Inhibitory effect on the growth of L. gibba already observed for 0.5% methanol was strongly associated with the increase in the nonphotochemical energy dissipation. The ratio between biomass and methanol concentration appeared to determine the stimulatory or the inhibitory effect. Suggested explanations for the stimulatory and the inhibitory effects are presented.

David Dewez, Claire Dautremepuits, Philippe Jeandet, Guy Vernet, and Radovan Popovic "Effects of Methanol on Photosynthetic Processes and Growth of Lemna gibba," Photochemistry and Photobiology 78(4), 420-424, (1 October 2003). https://doi.org/10.1562/0031-8655(2003)078<0420:EOMOPP>2.0.CO;2
Received: 23 June 2003; Accepted: 1 August 2003; Published: 1 October 2003
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