Individual Plant Growth Promoting Rhizobacteria from an effective consortiumstimulate different systemic protection in Oryza sativa against salt stress


Abstract: The aim of this study was to evaluate the individual capability of 5 PGPR strains,which co-inoculated demonstrated ability to protect rice plants against salt stress, to stimulate thesecondary metabolism of plant and protect them against salt stress. The strains used were:Arthrobacter oxidans BB1, Chryseobacterium balustinum AUR9, Bacillus sp. L81, Aeromonassp. AMG272 and Herbaspirillum sp. DSM6446. Seedlings growing for 7 days in hydroponic culturewere inoculated with PGPR, and 7 days after, NaCl was added to the medium to reach aconcentration of 3.5g/l. Two days later, the rate of wilt, the peroxidase activity (enzyme linked tostress situations), biometric parameters, and parameters related to plant photosynthetic efficiency(Fv / Fm, NPQ and ФPSII) were measured.Strains AMG272, L81 and Herbaspirillum were able to reduce the rates of withering up to80%, while BB1 and Aur 9 failed to protect the plants. The strains that protected against the saltstress, altered peroxidase activity and photosynthetic parameters following the guidelines set inthe literature of the process called “priming”.

Cookie Consent with Real Cookie Banner