Mazuecos-Aguilera Ismael, Anta-Fernández Francisco, Crespo-Barreiro Andrea, Martínez-Quesada Alejandro, Lombana-Larrea Luis, González-Andrés Fernando
Chemical, Environmental and Bioprocess Engineering Group, Institute for Research and Innovation in Engineering (I4), University of León, León, Spain.
FICOSTERRA, Burgos, Spain.
Front Plant Sci. 2025 Apr 15;16:1570986. doi: 10.3389/fpls.2025.1570986. eCollection 2025.
is one of the pathogenic fungi causing major problems worldwide in crops such as tomato. Some Plant Growth-Promoting Rhizobacteria (PGPR) can activate induced systemic resistance (ISR) pathways in crops, reducing the need for antifungals.
Three strains belonging to the species (CD_FICOS_02), (CD_FICOS_03), and (CD_FICOS_04), which exhibit outstanding PGPR properties, were evaluated for their ability to protect tomato plants against infection by ISR via soil inoculation.
The strains CD_FICOS_02 and CD_FICOS_03 reduced incidence and plant oxidative stress. The first strain mainly increased the expression of genes related to the salicylic acid pathway, while the second increased the expression of genes related to the jasmonic acid/ethylene hormonal pathway, indicating preferential ISR activation by each of these pathways. In addition, CD_FICOS_03 was able to increase the root and aerial biomass production of infected plants compared to the control. Interestingly, although the strain CD_FICOS_04 did not reduce the damage caused by , it increased the biomass of infected plants.
Our results suggest that the best strategy for biocontrol of is to combine the ability to promote plant growth with the ability to induce systemic resistance, as demonstrated by strains CD_FICOS_02 and CD_FICOS_03.
是一种在全球范围内给番茄等作物带来重大问题的致病真菌。一些植物促生根际细菌（PGPR）可以激活作物中的诱导系统抗性（ISR）途径，从而减少对抗真菌剂的需求。
对属于（CD_FICOS_02）、（CD_FICOS_03）和（CD_FICOS_04）物种且具有出色PGPR特性的三株菌株，通过土壤接种评估它们通过ISR保护番茄植株免受感染的能力。
菌株CD_FICOS_02和CD_FICOS_03降低了发病率和植物氧化应激。第一株菌株主要增加了与水杨酸途径相关基因的表达，而第二株菌株增加了与茉莉酸/乙烯激素途径相关基因的表达，表明这些途径各自优先激活ISR。此外，与对照相比，CD_FICOS_03能够增加受感染植株的根和地上生物量产量。有趣的是，尽管菌株CD_FICOS_04没有减少造成的损害，但它增加了受感染植株的生物量。
我们的结果表明，对进行生物防治的最佳策略是将促进植物生长的能力与诱导系统抗性的能力相结合，如菌株CD_FICOS_02和CD_FICOS_03所示。
