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首页> 外文期刊>Flora >Consequences of ramets helping ramets: No damage and increased nutrient use efficiency in nurse ramets of Glechoma longituba
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Consequences of ramets helping ramets: No damage and increased nutrient use efficiency in nurse ramets of Glechoma longituba

机译：分株助分株的后果：长寿草护士分株无损害，养分利用效率提高

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摘要

Source-sink relationships determine the transfer of resources among interconnected ramets of clonal plants and these relationships depend on resource regimes experienced by ramets. We hypothesized that if ramets growing in nutrient-richer patches support ramets in nutrient-poorer patches, then this support Would weaken the performance of Supporters themselves. This hypothesis was tested in an experiment, in which two interconnected ramet-groups of Glechoma longituba were subjected to four levels of nutrient-patch contrast. For nurse ramets, midday leaf water potential, net photosynthetic rate. fluorescence yield, specific root length, biomass, and root weight ratio remained unchanged along the gradient of patch contrast, indicating that no damage occurs to these ramets. Nitrogen use efficiency and phosphorus use efficiency of nurse ramets significantly increased with increasing patch contrast, suggesting that these increases may allow nurse ramets from habitats higher in patch contrast to have a greater capacity for export of nutrients than those ramets from habitats lower in patch contrast. In addition. we discuss the likely implications of these findings.
机译：源库关系决定了克隆植物相互联系的分株之间的资源转移，这些关系取决于分株所经历的资源制度。我们假设如果营养丰富的斑块中生长的分株支持营养缺乏的斑块中的分株，那么这种支持会削弱支持者自身的表现。在一个实验中检验了这一假设，在该实验中，对两个相互关联的长毛龟头菜组进行了四个水平的营养斑对比分析。对于护士分株，午间叶片水势，净光合速率。荧光增幅，比根长，生物量和根重比沿斑块对比度的梯度保持不变，表明这些分株未发生损害。随着斑块对比的提高，护士分株的氮利用效率和磷利用效率显着提高，表明这些增加可能使斑块对比较高的生境的护士分株比斑块对比较低的生境的分株具有更大的营养输出能力。此外。我们讨论了这些发现的可能含义。

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