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<p>Salinity is a&#xa0;complex problem resulting from climatic, hydrogeological and agricultural factors. Temperate zone fruit species have different levels of tolerance to salinity. The aim of this study was to determine the effects of some plant-growth promoting rhizobacteria (<i>Bacillus megaterium</i> FC11, <i>Bacillus subtilis</i> FC17 and <i>Kocuria erythromyxa</i> EY43) on physiological and biochemical properties in salty soil conditions in pear cultivars grafted on BA29 rootstock. The study was conducted in the 2019–2021, at the Selçuk University, Faculty of Agriculture in Konya, Türkiye. Bacterial treatments were applied to the saplings with irrigation water applied once every month for a&#xa0;total of four times. Salt treatments began 1&#xa0;month after planting, and 50 mM NaCl was applied twice a&#xa0;week with the irrigation water. While membrane permeability (MP), leaf relative water content (LRWC) and stomatal conductance (SC) had the highest values in the control group plants in both years under saline soil conditions, it had the lowest values in saline soils without bacterial application. EY43 bacterial strain was used in physiological measurements (MP, LRWC and SC) in a&#xa0;pear sapling and biochemical analyzes (proline and protein content) yielded the best results compared to the control group. This bacterial strain was followed by FC11 and FC17 bacterial strains in morphological measurements and biochemical analyzes (protein content). These results indicated that rhizobacteria strains are promising candidates under salt stress conditions.</p>

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Effects of Rhizobacteria on Physiological and Biochemical Properties of Pear Saplings Under Saline Soil Conditions

  • 期刊论文

  • 发表日期：

    2025年9月2日

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  • Mostafa Fraidoon Faaek Alı,
  • Lütfi Pırlak

摘要

Salinity is a complex problem resulting from climatic, hydrogeological and agricultural factors. Temperate zone fruit species have different levels of tolerance to salinity. The aim of this study was to determine the effects of some plant-growth promoting rhizobacteria (Bacillus megaterium FC11, Bacillus subtilis FC17 and Kocuria erythromyxa EY43) on physiological and biochemical properties in salty soil conditions in pear cultivars grafted on BA29 rootstock. The study was conducted in the 2019–2021, at the Selçuk University, Faculty of Agriculture in Konya, Türkiye. Bacterial treatments were applied to the saplings with irrigation water applied once every month for a total of four times. Salt treatments began 1 month after planting, and 50 mM NaCl was applied twice a week with the irrigation water. While membrane permeability (MP), leaf relative water content (LRWC) and stomatal conductance (SC) had the highest values in the control group plants in both years under saline soil conditions, it had the lowest values in saline soils without bacterial application. EY43 bacterial strain was used in physiological measurements (MP, LRWC and SC) in a pear sapling and biochemical analyzes (proline and protein content) yielded the best results compared to the control group. This bacterial strain was followed by FC11 and FC17 bacterial strains in morphological measurements and biochemical analyzes (protein content). These results indicated that rhizobacteria strains are promising candidates under salt stress conditions.