Abstract
Salinity leads to reduced plant growth by inhibiting the availability of nutrients especially phosphorous (P). The goal of this work is to demonstrate how phosphate-solubilizing bacteria (PSB) may be used to increase P availability in saline soils. A factorial experiment was carried out to discover the effect of PSB (Bacillus amyloliquefaciens and Bacillus pumilus) on modulating salinity stress (100 mM NaCl) through improving P (50 and 100 µM) availability based on a completely randomized designed (CRD). The results represented that B. pumilus was more effective in modulating salinity in most traits. Under saline conditions, B. pumilus in the presence of P at 50 µM led to increases in shoot dry weight (34%), root dry weight (54%), shoot length (39%), root length (37%), leaf P content (600%), relative water content (RWC, 13%), total chlorophyll (Chl, 32%), proline content (13%), but decreases in malondialdehyde (MDA, 25%), electrolyte leakage (EL, 21%), and soluble sugar (8%). According to principal component analysis (PCA), shoot and root length, root and shoot weight, Chl, and RWC had a negative correlation with MDA and EL. Based on agglomerative hierarchical clustering (AHC), results represented three distinguished clusters, where salinity and P have a noticeable role in this classification. Salinity elevated the expression of TIP41 (Tap42-interacting protein of 41 kDa) but lowered G6PDH (Glucose-6-phosphate dehydrogenase) and ARF15 (auxin response factor 15). Finally, the use of B. pumilus can be recommended to improve the P availability in saline soils through improving the growth, biochemical, and molecular status of chickpea plants.
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The data were prepared by Azam Rahimi Chegeni; the initial draft was prepared by Azam Rahimi Chegeni and Foad Fatehi and revised by others.
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Rahimi Chegeni, A., Fatehi, F., Ebrahimi, A. et al. Phosphate-Solubilizing Bacteria Modulated Salinity Stress in the Presence of Phosphorous through Improving Growth, Biochemical Properties, and Gene Expression of Chickpea (Cicer arientnum L.). J Soil Sci Plant Nutr 23, 4450–4462 (2023). https://doi.org/10.1007/s42729-023-01362-9
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DOI: https://doi.org/10.1007/s42729-023-01362-9