| optimal defense: snails avoid reproductive parts of the lichen lobaria scrobiculata due to internal defense allocation. | the optimal defense theory (odt) deals with defensive compounds improving fitness of a particular organism. it predicts that these compounds are allocated in proportion to the risk for a specific plant tissue being attacked and this tissue's value for plant fitness. as the benefit of defense cannot easily be measured in plants, the empirical evidence for odt is limited. however, lichens are unique in the sense that their carbon-based secondary compounds can nondestructively be removed or reduced ... | 2010 | 21058569 |
| differential sensitivity of four lobaria lichens to copper in vitro. | treatment of lobaria amplissima, lobaria pulmonaria, lobaria scrobiculata, and lobaria virens with 0 to 500 microm cuso4 for 0 to 120 min at 25.0 degrees c resulted in a time- and copper-concentration-dependent decrease in the thallus total potassium content and a release of k- from the thallus, indicating that copper damaged the cytoplasmic membrane of the fungal hyphae. lobaria pulmonaria was the most sensitive species, l virens the most resistant to copper treatment. lobaria amplissima and l. ... | 2002 | 12389928 |