Nutrient enrichment affects the mechanical resistance of aquatic plants.
Nutrient enrichment affects the mechanical resistance of aquatic plants.
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DOI：
10.1093/jxb/ers268
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发表时间：
2012-10
影响因子：
6.9
通讯作者：
Puijalon S
中科院分区：
文献类型：
--
作者：
Lamberti-Raverot B;Puijalon S
对于许多植物物种来说，养分的可利用性引起重要的解剖学反应，特别是产生低密度组织，损害支持组织。由于植物组织的生物力学特性的对比，这些解剖学响应可能会引起植物器官的生物力学特性的重要修改。本研究的目的是确定营养强化对两种淡水植物的解剖特征的影响及其对植物生物力学性能的后果。两种植物在受控条件下以低营养水平与高营养水平生长。测定了植物茎的解剖学和生物力学特性。这两个物种在营养丰富的条件下都产生了较低密度的组织，其中一个物种的通气组织结构发生了变化。正如预期的那样，营养富集也导致了两个物种的茎的生物力学特性的重要修改。特别是，机械阻力（断裂力和强度）和刚度的茎显着降低营养丰富的条件下。由于营养富集而产生的较弱的茎组织可能会增加植物机械故障的风险，从而挑战在机械压力或干扰生境中的植物维护。
For many plant species, nutrient availability induces important anatomical responses, particularly the production of low-density tissues to the detriment of supporting tissues. Due to the contrasting biomechanical properties of plant tissues, these anatomical responses may induce important modifications in the biomechanical properties of plant organs. The aim of this study was to determine the effects of nutrient enrichment on the anatomical traits of two freshwater plant species and its consequences on plant biomechanical performance. Two plant species were grown under controlled conditions in low versus high nutrient levels. The anatomical and biomechanical traits of the plant stems were measured. Both species produced tissues with lower densities under nutrient-rich conditions, accompanied by modifications in the structure of the aerenchyma for one species. As expected, nutrient enrichment also led to important modifications in the biomechanical properties of the stem for both species. In particular, mechanical resistance (breaking force and strength) and stiffness of stems were significantly reduced under nutrient rich conditions. The production of weaker stem tissues as a result of nutrient enrichment may increase the risk of plants to mechanical failure, thus challenging plant maintenance in mechanically stressful or disturbed habitats.
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影响因子：
1
作者：
Bociag, Katarzyna;Galka, Agnieszka;Szmeja, Jozef
通讯作者：
Szmeja, Jozef
影响因子：
3.4
作者：
Craine, JM;Froehle, J;Chapin, FS
通讯作者：
Chapin, FS
影响因子：
3
作者：
KOEHL, MAR
通讯作者：
KOEHL, MAR
影响因子：
9.4
作者：
Garnier, E;Salager, JL;Sonié, L
通讯作者：
Sonié, L
影响因子：
1.8
作者：
Barrat-Segretain, MH;Bornette, G;Hering-Vilas-Boas, A
通讯作者：
Hering-Vilas-Boas, A