Effects of Maternal Nutrient Pulse on Reproduction of Two Colonizing Plantago Species

摘要: Plantago major and P. rugelii maternal plants were grown at two background nutrient levels received pulses given different times during their life-span. The influences of these treatments on the reproduction progeny examined in four environments represented by treatments: with without competition, a pulse. We found that effects species related to both parents progeny. When from parent main- tained low level pulse had higher spike biomass proportional allocation spikes than did not receive In contrast, maintained high showed no response effect total leaf was For species, timing significant characters studied. for major, fruit maturation consistently produced greater amount relative neighboring pulses, regardless nutrients treatments. However, vegetative flowering stages, com- petitive ability neighbors depended treatment. rugelii, performance (leaf biomass) levels. These results show conditions can influence competitive inter- actions generation. may have ecological evolutionary im- plications particularly initial colonization infertile sites natural selection act phenotypic variation. strength depends environment environment.