原文链接：Richness and antagonistic effects co-affect plant growth promotion by synthetic microbial consortia - ScienceDirect

•Increasing microbial community richness had a positive effect on plant growth.

•Increasing antagonism intensity had a clear passive effect on plant growth.

•Synthetic community with lower diversity showed inconsistent performance in different resource conditions.

•Antagonistic intensity among strains does not change the positive BEF relationship.

Plant-related microbial communities are essential to plant growth and development, and empirical evidence suggests that inoculation with a synthetic microbial consortium can enhance plant performance; however, to manipulate the functions of these communities, we require a better understanding of the influencing factors. Here, we used the biodiversity ecosystem function (BEF) framework to specifically test the impact of community richness (1, 2, 4, or 8 strains per community) and antagonistic intensity on plant growth promotion in two kinds of nutritional environments. We found that increasing the richness of microbes can improve the accumulation of plant biomass, revealing that diversity effects were stronger than single-strain effects. The intensity of antagonism between highly diverse microbes may have a consistent negative effect on plant growth in comparison with the effects of communities with the same richness; intriguingly, this negative effect did not change positive BEF relationships. These results suggested that high diversity in the synthetic microbial consortia harboured stable and effective plant growth promotion capability and, in turn, also increased susceptibility to the negative effects of antagonism among microbial strains.

亮点

-增加微生物群落的丰富度对植物生长有积极影响。

-增加拮抗强度对植物生长有明显的被动影响。

-多样性较低的合成群落在不同资源条件下表现不一致。

-菌株间的拮抗强度不会改变 BEF 的正相关关系。

摘要

与植物相关的微生物群落对植物的生长和发育至关重要，经验证据表明，接种合成微生物群落可以提高植物的生长性能；然而，要操纵这些群落的功能，我们需要更好地了解影响因素。在这里，我们利用生物多样性生态系统功能（BEF）框架，专门测试了两种营养环境中群落丰富度（每个群落 1、2、4 或 8 株）和拮抗强度对植物生长促进作用的影响。我们发现，增加微生物的丰富度可以提高植物生物量的积累，这表明多样性效应强于单一菌株效应。与具有相同丰富度的群落效应相比，高度多样化的微生物之间的拮抗强度可能会对植物生长产生一致的负面效应；有趣的是，这种负面效应并没有改变 BEF 的正向关系。这些结果表明，合成微生物群落的高度多样性具有稳定而有效的植物生长促进能力，反过来也增加了对微生物菌株间拮抗的负面影响的敏感性。

图 1. 微生物群落丰富度对植物生长的影响。添加微生物（A），微生物与有机肥一起添加（B）。植物生长促进作用的计算方法是微生物群落鲜重变化与对照处理鲜重变化的百分比。在所有图中，每个点对应不同的微生物群落。

图 2. 菌株拮抗强度对植物生长的影响。微生物以双菌株微生物群落（A）、四菌株微生物群落（B）、有机肥双菌株微生物群落（C）和有机肥四菌株微生物群落（D）添加。植物生长促进作用以微生物群落鲜重与对照处理鲜重的百分比变化来计算。

转载本文请联系原作者获取授权，同时请注明本文来自王敬敬科学网博客。

链接地址：https://wap.sciencenet.cn/blog-2675068-1445641.html?mobile=1

收藏

分享