Potential effect of root-associated bacteria from Origanum vulgare L. on wheat and tomato seedlings
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Abstract
Medicinal plant root bacteria present multifunctionality and can act as important stimulator agents for their host plant. Eight strains recovered from the roots of Origanum vulgare L. medicinal plants growing in Ben Djerrah, Guelma, Algeria, were classified into the genera Bacillus, Burkholderia, Rhodococcus, and Pseudomonas. The functional traits for amylase, lipase, and indole-3-acetic acid (IAA) production were detectedلin all strains, while 75% were positive for hydrolytic proteases. Particular emphasis is placed on strains EpB1 and EdB8, which were efficient enzyme producers and exhibited the highest IAA production (114.56±0.27 μg/ml and 114.06±0.44 μg/ml, respectively). There was a significant enhancement in the growth of wheat and tomato seeds pretreated with the isolates Bacillus cereus EpB1, Pseudomonas luteola EdB6, and Bacillus subtilis EdB8. They enhanced the seed germination rate, vigor index, and the shoot and root lengths and biomass of seedlings in comparison to the control. Accordingly, the epiphytic strain EpB1 and the endophytic strains EdB8 and EdB6 from Origanum vulgare L. roots could potentially be used as biofertilizers to manage wheat and tomato cultivation.
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References
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