van Leeuwen B H
Department of Ecology, University of Leiden, Kaiserstraat 63, 2300RA, Leiden, The Netherlands.
Oecologia. 1981 Feb;48(1):112-115. doi: 10.1007/BF00346996.
Cirsium vulgare is a plant species of disturbed sites. To understand this distribution the effect of micro-organisms on the germination in this species was investigated as the microflora of disturbed and non-disturbed sites shows differences. It was found that micro-organisms from fruitcoat and environment do influence germination. In an environment containing humus, germination is stimulated.Mortality of seedlings is higher in undisturbed sites, resulting in the observed distribution. It is hypothesized that this mortality is the result of germination, forced by microbial activity (break-down of the fruitcoat, exudation of growth-regulating substances) under conditions in which the survival chances of the seedling are low.
刺菜是一种生长在受干扰地区的植物物种。为了理解这种分布情况，研究了微生物对该物种种子萌发的影响，因为受干扰和未受干扰地区的微生物群落存在差异。研究发现，来自果皮和环境的微生物确实会影响种子萌发。在含有腐殖质的环境中，种子萌发受到促进。在未受干扰的地区，幼苗死亡率较高，从而导致了所观察到的分布情况。据推测，这种死亡率是在幼苗存活机会较低的条件下，由微生物活动（果皮分解、生长调节物质渗出）促使种子萌发所导致的结果。
