Pierce S M, Esler K, Cowling R M
Bolus Herbarium, University of Cape Town, Private Bag, 7700, Rondebosch, South Africa.
Institute for Plant Conservation, University of Cape Town, Private Bag, 7700, Rondebosch, South Africa.
Oecologia. 1995 Jun;102(4):520-522. doi: 10.1007/BF00341366.
Previous studies have shown germination to be stimulated by fire-related cues such as heat and charate extract and, more recently, plant-derived smoke extract. However, smoke extract has not been tested on non-fire-prone species. We hypothesized that smoke-induced germination would be restricted to fire-prone species and investigated responses of members of the family Mesembryanthemaceae which has genera confined to fire-prone and to non-fire-prone habitats as well as genera with species across both habitats. Results of germination trials of smoke effects did not support the hypothesis. Plant-derived smoke extract stimulated germination in both fire-prone and non-fire-prone species. These results cast some doubt on the ecological significance of smoke as a fire-related cue and we suggest that investigation of effects of fire-related cues on non-fire prone species may throw light on general mechanisms of germination.
先前的研究表明，与火相关的线索，如热量和木炭提取物，以及最近的植物源烟雾提取物，都能刺激种子萌发。然而，烟雾提取物尚未在不易发生火灾的物种上进行测试。我们假设烟雾诱导的种子萌发仅限于易发生火灾的物种，并研究了番杏科植物的反应，该科的属既包括局限于易发生火灾和不易发生火灾栖息地的，也包括有物种分布于这两种栖息地的。烟雾影响种子萌发试验的结果不支持这一假设。植物源烟雾提取物刺激了易发生火灾和不易发生火灾物种的种子萌发。这些结果对烟雾作为与火相关线索的生态意义提出了一些质疑，我们建议研究与火相关线索对不易发生火灾物种的影响可能会揭示种子萌发的一般机制。
