University of Denver, Denver, CO, USA,
Mycorrhiza. 2014 Feb;24(2):109-19. doi: 10.1007/s00572-013-0515-x. Epub 2013 Aug 6.
Despite a large body of literature that describes the effects of arbuscular mycorrhizal colonization on plant response to water deficit, reviews of these works have been mainly in narrative form, and it is therefore difficult to quantify the magnitude of the effect. We performed a meta-analysis to examine the effect of mycorrhizal colonization on growth and yield of plants exposed to water deficit stress. Data were compared in the context of annual vs. perennial plants, herbaceous vs. woody plants, field vs. greenhouse conditions, degree of stress, functional group, regions of plant growth, and mycorrhizal and host species. We found that, in terms of biomass measurements, mycorrhizal plants have better growth and reproductive response under water stress compared to non-mycorrhizal plants. When variables such as habit, life cycle, or water stress level are considered, differences in mycorrhizal effect on plant growth between variables are observed. While growth of both annual and perennial plants is improved by symbiosis, perennials respond more favorably to colonization than annuals. Overall, our meta-analysis reveals a quantifiable corroboration of the commonly held view that, under water-deficit conditions, plants colonized by mycorrhizal fungi have better growth and reproductive response than those that are not.
尽管有大量文献描述了丛枝菌根定殖对植物对水分亏缺响应的影响，但这些文献的综述主要以叙述性形式出现，因此难以量化影响的大小。我们进行了荟萃分析，以检验菌根定殖对暴露于水分亏缺胁迫下的植物生长和产量的影响。我们在一年生植物与多年生植物、草本植物与木本植物、田间条件与温室条件、胁迫程度、功能群、植物生长区域以及菌根和宿主物种等方面比较了数据。我们发现，就生物量测量而言，与非菌根植物相比，菌根植物在水分胁迫下具有更好的生长和繁殖响应。当考虑到习性、生命周期或水分胁迫水平等变量时，菌根对植物生长的影响在变量之间存在差异。虽然共生会促进一年生和多年生植物的生长，但与一年生植物相比，多年生植物对定殖的反应更为有利。总体而言，我们的荟萃分析揭示了一种可量化的证实，即在水分亏缺条件下，被菌根真菌定殖的植物比未被定殖的植物具有更好的生长和繁殖响应。
