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Fatemeh Jafari, Ali Ganjeali, Elham Amjadi,
Volume 10, Issue 4 (3-2024)
Abstract

Nepeta binaludensis jamzad, as a medicinal plant, which is at risk of extinction due to irregular harvesting and damage of its habitat. Four treatments including: 1- inoculation with Azotobacter chooroccum, 2- inoculation with Bacillus cereus and Pseudomonas putida, 3- inoculation with a mix of three bacteria (A. chooroccum + B. cereus + P. putida) and 4 controls (without inoculation), in the form of a completely randomized design with 3 replications in two vegetative growth stages (ten and twenty weeks after sowing). Plant growth-promoting bacteria (PGPB) improved all the evaluated morphological characteristics, including the length and dry weight of the aerial part, total leaf area and root length compared to the control. Also, the results of biochemical investigations showed that in 10 and 20 weeks old plants, the application of PGPB could increase the phenolic and flavonoid compounds and also antioxidant activity. The contain of some elements such as calcium, potassium, phosphorus, iron and magnesium also increased as a result of inoculation with PGPB. Since the PGPB improved the growth and also increased the effective compounds of N. binaludensis plants, they can be introduced as useful bio fertilizers and considered as a good alternative to chemical fertilizers.

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