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A lichen Peltigera aphthosa (L.) Willd. was subjected to a short-term (7 days) or a long-term (180 and 540 days) dehydration followed by rehydration. Then the composition and content of lipids, as well as the rate of their metabolism (the rate of sodium 2-14C-acetate incorporation) were investigated. The long-term dehydration resulted in a dramatic decrease in the content (per dry wt) of major extrachloroplastic...