Achieving higher rice productivity without compromising grain or soil quality remains a key challenge in sustainable agriculture. Although the endophytic bacterial strain Pseudomonas mosselii has shown potential in enhancing rice growth, its role in improving grain nutritional quality and soil health remains underexplored. This study evaluated the role of P. mosselii PR5 in promoting rice growth, yield, grain quality, and soil health through various application methods: seed priming (SP), seedling priming (SeP), bacterial culture filtrate (BCF) foliar application, SP combined with BCF (SP + BCF), and SeP combined with BCF (SeP + BCF). All treatments significantly improved rice growth and yield traits. Bacterial applications increased the plant height (4.1-9.4%), shoot biomass (30.5-64.3%), root biomass (31.8-64.5%), photosynthetic pigments (8.2-36.4%), filled grain per pot (4.2-11.8%), compared to the control. Notably, SP + BCF and SeP + BCF treatments increased rice yield by 55.2% and 48% respectively, over the control. PR5 application significantly increased the nutrient contents in rice, enhancing protein and fat while reducing carbohydrate content in grain. The SP + BCF treatment enhanced the availability of sulfur (S), magnesium (Mg), iron (Fe), and organic matter in the rhizospheric soil, whereas SeP + BCF treatment improved nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), and zinc (Zn) availability, contributing to soil fertility restoration. Multivariate analysis also confirmed a positive association of growth and yield parameters and most of the nutrients with these two treatments. These findings suggest that P. mosselii PR5, applied via seed or seedling priming in combination with BCF foliar treatment, offers a promising strategy for sustainable rice cultivation and soil health management.
Sourav Biswas Shuvo, R. Sultana, Shah Mohammad Naimul Islam et al.· Scientific Reports· 0 citations
The use of inorganic fertilizers in rice farming has led to increased production costs, reduced nutritional value, and it results in major ecological damage. Harnessing plant growth‐promoting rhizobacteria (PGPR) offers a promising eco‐friendly alternative to conventional fertilization strategies. This study evaluates the potential of Pseudomonas mosselii PR5 as a bioinoculant to enhance rice growth under reduced fertilizer inputs in a pot experiment. Two application methods, seed priming (B1) and seed priming combined with bacterial culture filtrate (BCF) foliar spray (B2), were evaluated across four fertilizer regimes: 0% (F0), 50% (F1), 75% (F2), and 100% (F3) of the recommended dose of fertilizer (RDF). Application of PR5 significantly enhanced rice growth, yield, and yield‐related traits across all fertilizer levels and application methods. At 100% RDF, the combination of seed priming with foliar application of PR5 resulted in marked increases in plant height (4.3%), biomass (64.4%), chlorophyll content (47.4%), grain yield (48%), and benefit–cost ratio (67.6%) compared to the 100% RDF alone. Notably, the combined PR5 application at 75% RDF showed similar agronomic performance and yield as in the 100% RDF treatment, indicating 25% less fertilizer requirement for maintaining crop profitability. Multivariate analysis also confirmed a strong association of grain and soil nutrients with the combined application of PR5 at 75% and 100% RDF. PR5 application also boosted both grain nutrient content and post‐harvest soil nutrient levels. Thus, this research showed that PR5 application increased crop productivity while improving grain nutritional quality and lowering the need for chemical fertilizers towards sustainable agriculture.
Sourav Biswas Shuvo, R. Sultana, Shah Mohammad Naimul Islam et al.· Plant-Environment Interactio...· 0 citations
