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Green mops

发布时间:2019-03-08 04:17:01来源:未知点击:

LICHENS’ tolerance of heavy metals could suggest new ways to mop up pollution. Geraldine Sarret and her colleagues at the University of Grenoble in France used X-ray spectroscopy to study the chemistry of how lichens absorb zinc and lead. One lichen, Diploschistes muscorum, secreted an organic compound called oxalate that traps the metals outside the lichen’s cells ( Environmental Science & Technology, vol 32, p 3325). “This is a barrier to toxicity,” says Sarret, now at the University of Western Ontario in London, Canada. She hopes that by understanding the genetics behind this,