Effect of plant growth-promoting bacteria and arbuscular mycorrhizal fungi on lipid peroxidation and total phenolics of strawberry (Fragaria × ananassa San Andreas') under salt stress

In this study, the effects of plant development-promoting bacteria (Bacillus cereus RCP 3/1 + Rhizobium radiobacterRCR 11/2) (including the aminocyclopropane carboxylate deaminase enzyme) and different salt stress conditions (0, 30, and 60mM/L NaCl) on the San Andreas variety of strawberry were studied on a number of harvest days. Some biochemical changes dueto mycorrhizal fungus applications (including some Glomus species) were investigated as well. In the trial, as salt concentrationincreased, total phenolics and lipid peroxidation (malondialdehyde (MDA) content) increased compared to the control. The effectsof salt concentration and experimental applications on total phenolic content reached their maximum on day 45, while their effectson MDA reached a maximum on day 30. In terms of applications, the mycorrhizal application decreased both total phenolics andMDA content. When the interaction of salt and applications was examined, the highest MDA content (3.568 µM g 1 FW) and totalphenolics amount (0.343 mg g 1) were observed with the 60 mM/L NaCl concentration in the control application. The results indicatethat the arbuscular mycorrhizal fungi were capable of alleviating the change in biochemical contents caused by salinity stress on thestrawberry plants.

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