Experts identify growth trigger for marine algae
By Wendy Heller, November 8, 2007 @ 02:00 AM (EST)
Source: Reuters.com
Japanese scientists have identified two light receptors in marine algae which appear to be responsible for the proliferation of these plants.The scientists hope to use the findings, published in the Proceedings of the National Academy of Sciences, to control unwanted algal growth, such as red tides, or to cultivate coveted species of kelp that are used as food.In their experiment, the scientists removed the receptors genetically from a species of algae, called vaucheria, and found that the plant could no longer grow even though it was exposed to blue light for the next six months.Blue light is critical for the survival and growth of marine plants as light of other wavelengths cannot penetrate the thick water mass."(What) we did was to destroy the receptor molecules and no branch grew at all (even) with the irradiation of blue light," researcher Hironao Kataoka at the Graduate School of Life Sciences at the Tohoku University said in an interview."The function of the blue light receptor was destroyed, so the response (growing of new branches) was destroyed."
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