Grasslands Research Centre, AgResearch Limited, Palmerston North, New Zealand.
Ecol Lett. 2022 Aug;25(8):1879-1888. doi: 10.1111/ele.14073. Epub 2022 Jul 9.
Plants interacting with mutualistic fungi (MF) or antagonistic fungi (AF) can form associations with bacteria. We assessed whether the performance gain conferred by mutualistic bacteria to fungal-associated plants is affected by the interaction between symbiont traits, type of bacterial-protective traits against AF and abiotic/biotic stresses. Results showed that (A) performance gain conferred by bacteria to MF-associated plants was greater when symbionts promoted distinct rather than similar plant functions, (B) bacterial-based alleviation of the AF's negative effect on plants was independent of the type of protective trait, (C) bacteria promoted a greater performance of symbiotic plants in presence of biotic, but not abiotic, stress compared to stress-free situations. The plant performance gain was not affected by any fungal-bacterial trait combination but optimised when bacteria conferred resistance traits in biotic stress situations. The effects of bacteria on fungal-associated plants were controlled by the interaction between the symbionts' functional traits and the relationship between bacterial traits and abiotic/biotic stresses.
与互利真菌 (MF) 或拮抗真菌 (AF) 相互作用的植物可以与细菌形成共生关系。我们评估了互利细菌赋予与真菌相关的植物的性能增益是否受到共生体特征、针对 AF 的细菌保护特征的类型以及非生物/生物胁迫之间的相互作用的影响。结果表明，(A) 当共生体促进不同而非相似的植物功能时，细菌赋予 MF 相关植物的性能增益更大，(B) 细菌对 AF 对植物的负面影响的缓解与保护特征的类型无关，(C) 与无胁迫情况相比，细菌在生物胁迫存在的情况下促进了共生植物更大的性能。植物的性能增益不受任何真菌-细菌特征组合的影响，但在生物胁迫情况下，当细菌赋予抗性特征时，植物的性能增益得到优化。细菌对与真菌相关的植物的影响受共生体功能特征的相互作用以及细菌特征与非生物/生物胁迫之间关系的控制。
