1. Flood-sensitive plant species are restricted to highly elevated sites in floodplains, but why flood-tolerant plants do not grow at higher elevations is much less clear. We test the hypothesis that a trade-off exists between flood-tolerance and selective root placement in nutrient-rich patches, a putatively important trait in the more competitive highly elevated sites. 2. Achillea ptarmica , ...

KELLERMAN, T . S., BASSON, P. A., NAUDE, T. W., VAN RENSBURG, I . B. J. & WELMAN, WILHELMINA G., 1973. Photosensitivity in South Africa. 1. A comparative study of A saemia A xillaris (Thunb.) Harv. Ex Jackson and Lasiospermum Bipinnatum (Thunb.) Druce poisoning in sheep. Onderstepoort J. vet. Res. 40 (3), 115-126 (1973). Experimental evidence is presented to confirm field observations that Asae...

The Ranunculus auricomus complex is an interesting model system for studying the evolution and diversity of apomictic polyploid complexes. It comprises hundreds of agamospecies, usually referred to two distinct morphotypes (traditionally named "R. auricomus" and "R. cassubicus") which are connected by several intermediate forms. Here we try to elucidate the evolution of apomictic "cassubicus" m...

Fortgeführt von A. Kossei, F.Knoop, K.Thomas, F. Lynen, A. Butenandt und G. Weitzel Herausgegeben von K.Decker, W.Stoffel, H.G.Zachau unter Mitwirkung von H. Eggerer, J. Engel, H. Fritz, E. Habermann, E. Helmreich, A. Henschen, B. Hess, N. Hilschmann, H. Hilz, P.W. Jungblut, K. Jungermann, P. Karlson, H. Kleinkauf, H.L. Kornberg, K. Kühn, D. Oesterhelt, K. Rajewsky, K. Sandhoff, R. Schauer, J. ...

In a wet oligotrophic meadow located in the Czech Republic, a factorial experiment with treatments consisting of fertilization, mowing, and removal of the dominant species (Molinia caerulea) was established in 1994. In 1997 Holcus lanatus, Molinia caerulea, Potentilla erecta, Prunella vulgaris, and Ranunculus auricomus were examined for arbuscular mycorrhizal (AM) hyphae, arbuscles, and vesicle...