Are traits measured on pot grown plants representative of those in natural communities
Are traits measured on pot grown plants representative of those in natural communities
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盆栽植物的性状测量是否能代表自然群落中的性状
DOI：
10.3170/2007-8-18340
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发表时间：
2008
期刊：
影响因子：
2.7
通讯作者：
J. Ash
中科院分区：
文献类型：
--
作者：
K. Mokany;J. Ash
摘要问题：在自然群落中的功能性状的量化可能是困难的（例如根性状，RGR）。在盆栽植物上测量的功能性状能可靠地应用于自然群落吗？或者，地下植物性状可以从地上性状预测吗？地点：澳大利亚东南部。研究方法：我们比较了17个拍摄，根和全株的形态特征测量14种植物在天然草原社区的两个不同的盆栽条件下测量：未施肥和施肥。结果如下：盆栽植物的大多数性状值与田间植物不同，然而，田间和两种盆栽生长条件之间的大多数叶性状的物种排名保持一致。相比之下，物种排名是不一致的，大多数整株性状比较时，田间植物施肥盆栽植物，提供了一个警告的倾向，植物生长在受控条件下，在“最佳”（高）的资源水平。地下和地上植物性状之间存在中度到较强的相关性，包括根干物质含量和叶干物质含量之间，以及比根面积和比叶面积之间。结论：盆栽植物量化田间植物性状的效用高度依赖于受控环境中生长条件的选择。我们观察到的地上和地下性状策略之间的一致性表明，地下性状可以根据地上性状进行预测，减少了对培养植物根系性状进行量化的必要性。命名：Harden（1996）; Linder（1997）。
Abstract Question: The quantification of functional traits in natural communities can be difficult (e.g. root traits, RGR). Can functional traits measured on pot grown plants be reliably applied to natural communities? Alternatively, can below-ground plant traits be predicted from above-ground traits? Location: Southeastern Australia. Methods: We compared 17 shoot, root and whole-plant morphological traits measured on 14 plant species in a native grassland community to those measured under two different pot conditions: unfertilised and fertilised. Results: The majority of trait values for pot grown plants differed to plants in the field, however, species ranking remained consistent for most leaf traits between the field and the two pot growing conditions. In contrast, species ranking was not consistent for most whole plant traits when comparing field plants to fertilised pot grown plants, providing a caution against the tendency to grow plants in controlled conditions at ‘optimal’ (high) resource levels. Moderate to strong correlations were found between below-ground and above-ground plant traits, including between root dry matter content and leaf dry matter content, and between specific root area and specific leaf area. Conclusions: The utility of pot grown plants to quantify traits for field plants is highly dependent on the selection of the growing conditions in the controlled environment. The consistency we observed between above-ground and below-ground trait strategies suggests that below-ground traits may be predictable based on above-ground traits, reducing the need to quantify root traits on cultured plants. Nomenclature: Harden (1996); Linder (1997).