Improved growth of bell pepper (Capsicum annuum) plants by inoculating arbuscular mycorrhizal fungi and beneficial rhizobacteria
DOI:
https://doi.org/10.33885/sf.2021.51.1299Abstract
Background: Plant growth promoting rhizobacteria (PGPR) and arbuscular mycorrhizal fungi (AMF) are an alternative for sustainable management of pepper crops.
Objective: To investigate the beneficial effects of PGPR and AMF inoculation on the growth of bell pepper plants.
Methods: Two PGPR strains were used (Pseudomonas tolaasii P61 and Bacillus pumilus R44) as well as their mixture, and an uninoculated control. In addition, bacterial treatments were combined with an AMF-consortium (Funneliformis aff. geosporum and Claroideoglomus sp.). A 4×2 factorial experiment [four levels for the bacterial inoculation and two levels of AMF-inoculation (non-AMF and AMF)] was performed with eight treatments, at greenhouse conditions for 80 days after inoculation. AMF inoculation was done at sowing and PGPR after 15 days of seedling emergence.
Results and Conclusions: Uninoculated control showed lower growth responses than plants inoculated with PGPR and AMF, alone or in combination. Overall, inoculation of the strain P61 or the combination of R44+AMF increased plant growth. AMF improved the photochemical efficiency of PSII in comparison to either control plants or plants inoculated with R44 or with the bacterial mix. Both PGPR and AMF improved growth and vigor of bell pepper plants.
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