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Ferrusquía-Jiménez, Noelia I; González-Arias, Beatriz; Rosales, Alicia; Esquivel, Karen; Escamilla-Silva, Eleazar M; Ortega-Torres, Adrian E; Guevara-González, Ramón G
Plants (Basel), 12/2022, Letnik: 11, Številka: 24Journal Article
Agriculture needs to decrease the use of agrochemicals due to their high toxicity and adopt new strategies to achieve sustainable food production. Therefore, nanoparticles (NPs) and plant growth-promoting bacteria (PGPB) have been proposed as viable strategies to obtain better crop yields with less environmental impact. Here, we describe the effect of silica nanoparticles (SiOsub.2 -NPs) on survival, antioxidant enzymatic activity, phosphate solubilization capacity, and gibberellin production of Bacillus cereus-Amazcala (B.c-A). Moreover, the effect of the co-application of SiOsub.2 -NPs and B.c-A on seed germination, physiological characteristics, and antioxidant enzymatic activity of chili pepper plants was investigated under greenhouse conditions. The results indicated that SiOsub.2 -NPs at 100 ppm enhanced the role of B.c-A as PGPB by increasing its phosphate solubilization capacity and the production of GA7. Moreover, B.c-A catalase (CAT) and superoxide dismutase (SOD) activities were increased with SiOsub.2 -NPs 100 ppm treatment, indicating that SiOsub.2 -NPs act as a eustressor, inducing defense-related responses. The co-application of SiOsub.2 -NPs 100 ppm and B.c-A improved chili pepper growth. There was an increase in seed germination percentage, plant height, number of leaves, and number and yield of fruits. There was also an increase in CAT and PAL activities in chili pepper plants, indicating that bacteria–NP treatment induces plant immunity.
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