Phenotypic plasticity in response to mechanical stress: hydrodynamic performance and fitness of four aquatic plant species.
Phenotypic plasticity in response to mechanical stress: hydrodynamic performance and fitness of four aquatic plant species.
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DOI：
10.1111/j.1469-8137.2007.02314.x
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发表时间：
2008-03
期刊：
影响因子：
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通讯作者：
S. Puijalon;J. Léna;N. Rivière;J. Champagne;J. Rostan;G. Bornette
中科院分区：
文献类型：
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作者：
S. Puijalon;J. Léna;N. Rivière;J. Champagne;J. Rostan;G. Bornette
暴露于机械应力下的植物的塑性反应可以导致改变，性能增强，形态，有时伴随着繁殖成本。对四种水生植物进行了测试，测试了它们对当前压力做出短期塑性反应的能力、由此产生的性能（预期较低的机械力）以及这种反应对繁殖的成本。同一品种的两株分别进行流水和静水处理。性状描述形态，水动力性能和生殖（有性和营养）进行了测量。对于一个物种，塑性反应导致水动力力降低，而没有明显的繁殖成本，这表明塑性反应可能有利于植物在有压力的栖息地中维持。对于两个物种，塑性反应与性能和繁殖的变化无关，可能是因为所经历的低水动力，即使是在固定条件下产生的形态。对于一个物种，塑性反应与有性繁殖的急剧减少有关，而性能没有变化，揭示了电流在短时间内的负面影响。物种的维持与个体承受机械力的能力有关。对水流的不同反应可能是预测群落动态的关键因素。
Plastic responses of plants exposed to mechanical stress can lead to modified, performance-enhancing, morphologies, sometimes accompanied by costs to reproduction. The capacity to present short-term plastic responses to current stress, the resulting performance (expected lower mechanical forces), and the costs of such responses to reproduction were tested for four aquatic plant species. Two ramets of the same genet were submitted to running vs standing water treatment. Traits describing the morphology, hydrodynamic performance and reproduction (sexual and vegetative) were measured. For one species, plastic responses led to reduced hydrodynamic forces, without apparent costs to reproduction, indicating that the plastic response could be beneficial for plant maintenance in stressful habitats. For two species, plastic responses were not associated with variations in performance and reproduction, possibly because of the low hydrodynamic forces experienced, even for morphologies produced under standing conditions. For one species, plastic responses were associated with a sharp decrease in sexual reproduction, without variations in performance, revealing the negative impact of currents over a short time scale. Species maintenance is linked to the capacity of individuals to tolerate mechanical forces. The contrasting responses to currents may be a key element for predicting community dynamics.