Turanoglu Cem, Ancel Héloïse, Lann Cécile Le, Van Baaren Joan, Bazin Ophélie, Declerck Stéphane, Fort Florian, Breton Thierry Fontaine, Vandenkoornhuyse Philippe, Mony Cendrine
University of Rennes, CNRS, ECOBIO (Ecosystems-Biodiversity-Evolution), UMR 6553, Campus de Beaulieu, 263 Avenue du Général Leclerc, Rennes Cedex, 35042, France.
Laboratory of Plant Biology Yves Rocher, La Gacilly, France.
Mycorrhiza. 2025 Jun 5;35(3):40. doi: 10.1007/s00572-025-01214-7.
Plants interact closely with arbuscular mycorrhizal (AM) fungi. They allocate photosynthates to AM fungi in exchange for nutrients, thereby influencing plant fitness. Although plant phenotypes result from multiple traits constrained by trade-offs, the effects of AM fungi on plants are often studied using one trait. Plant response to AM fungi therefore needs to be analysed using multiple traits. Four Asteraceae species were inoculated with ten AM fungal strains using a factorial design in the greenhouse. The effect of AM fungal inoculation and their taxonomic identity on plants vegetative and reproductive traits were assessed. The predictability of the effects was evaluated based on AM fungal phylogenetic relatedness. The effect of the inoculation depended on the trait considered. Compared with the non-inoculated control, biomass allocation to roots decreased, while allocations to shoots or reproduction increased depending on the AM fungi or the plant. Significant differences were observed among AM fungi inoculates used, whether looking at separate traits, trade-offs between vegetative or reproductive growth, and the trait syndrome. In Centaurea cyanus, changes in plant phenotype were associated with the phylogenetic distance between AM fungi. These results underline the importance of using multi-trait approaches to understand AM fungal effects on plant phenotype. In accordance with the holobiont concept, the outcomes of this interaction depended on both the host plant and the AM fungus involved. It contributes to a better understanding of the biological effectors shaping the reaction norm (i.e., the range of phenotypic variation of a given host genotype) within the plant holobiont.
植物与丛枝菌根（AM）真菌密切相互作用。它们将光合产物分配给AM真菌以换取养分，从而影响植物的适应性。尽管植物表型由受权衡约束的多个性状决定，但AM真菌对植物的影响通常仅通过一个性状来研究。因此，需要使用多个性状来分析植物对AM真菌的反应。在温室中采用析因设计，用10种AM真菌菌株接种4种菊科植物。评估了AM真菌接种及其分类身份对植物营养和生殖性状的影响。基于AM真菌的系统发育相关性评估了这些影响的可预测性。接种的影响取决于所考虑的性状。与未接种的对照相比，根系生物量分配减少，而地上部分或繁殖的生物量分配根据AM真菌或植物的不同而增加。无论是单独考虑性状、营养生长与生殖生长之间的权衡，还是性状综合征，在所使用的AM真菌接种物之间都观察到了显著差异。在矢车菊中，植物表型的变化与AM真菌之间 的系统发育距离有关。这些结果强调了使用多性状方法来理解AM真菌对植物表型影响的重要性。根据共生体概念，这种相互作用的结果取决于宿主植物和所涉及的AM真菌。它有助于更好地理解塑造植物共生体内反应规范（即给定宿主基因型的表型变异范围）的生物效应器。
