Published in Scientific Papers. Series B, Horticulture, Vol. LXVIII, Issue 1
Written by Daniel-Nicolae COJANU, Maria-Cristina LUMÎNARE, Oana Alina BOIU-SICUIA, Călina Petruța CORNEA
Various bacterial strains have been described, over time, as plant growth promoters. The aim of this study was to evaluate the effect of some native bacterial strains applied as soil treatment on tomato seedlings, grown in greenhouse conditions, Giurgiu County. Seven bacterial strains were used in this study, three Bacillus cereus/thuringiensis strains, and one strain of each Acinetobacter guillouiae, Bacillus safensis, Paenibacillus castaneae, and P. lautus species. Certain plant growth parameters were evaluated to compare bacterial effects on the plant growth, such as leaves’ chlorophyll content, plant height and stem diameter. Compared to the untreated tomato seedlings, most of the tested bacterial strains improved the plants’ growth. Among all the analyzed strains, the highest chlorophyll content was registered in tomato leaves when treated with Acinetobacter guillouiae (2.07 mg/g fresh weight). The obtained results confirm the hypothesis of using selected beneficial bacteria as plant growth promoters in tomato crop. Further evaluations are needed, in order to establish the positive effects of these bacterial inoculants on tomato fruits quality and quantity.
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