caa a22 4500 469098147 CHVBK 20180323133037.0 cr unu---uuuuu 170328e19920801xx s 000 0 eng 10.1007/BF00317799 doi (NATIONALLICENCE)springer-10.1007/BF00317799 Seed size: phylogeny and adaptation in two closely related Proteaceae species-pairs [Elektronische Daten] [P. Mustart, R. Cowling] Summary: We studied seed size, seed nutrient status and seedling growth of two closely related fynbos Proteaceae species-pairs growing on juxtaposed soils of different nutrient and moisture status. Seeds had a greater mass and higher phosphorus and nitrogen contents for species occurring on limestone (higher nutrient and moisture contents) than those on the colluvial sands (lower nutreints and moisture). This trend was found within, but not across genera, stressing the importance of phylogeny in interpreting adaptations. It would be difficult to test for the effects of either nutrients or moisture separately, since the same advantage of enhanced seedling size, and hence survival in a stressed environment, applies to both factors. The increased root: shoot ratios (using lengths) of the Leucadendron species relative to the Protea species are interpreted as an attempt to overcome a phylogenetic constraint that results in smaller seed size in the former genus. Springer-Verlag, 1992 Seed size nationallicence Soil nutrient and water status nationallicence Phylogenetic constraints nationallicence Relative growth rates nationallicence Mustart P. Department of Botany, University of Cape Town, Private Bag, 7700, Rondebosch, South Africa aut Cowling R. Department of Botany, University of Cape Town, Private Bag, 7700, Rondebosch, South Africa aut Oecologia Springer-Verlag 91/2(1992-08-01), 292-295 0029-8549 91:2<292 1992 91 442 https://doi.org/10.1007/BF00317799 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00317799 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mustart P. Department of Botany, University of Cape Town, Private Bag, 7700, Rondebosch, South Africa aut NATIONALLICENCE 700 1- Cowling R. Department of Botany, University of Cape Town, Private Bag, 7700, Rondebosch, South Africa aut NATIONALLICENCE 773 0- Oecologia Springer-Verlag 91/2(1992-08-01), 292-295 0029-8549 91:2<292 1992 91 442 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer