Credibility assessment of cold adaptive Pseudomonas jesenni MP1 and P. palleroniana N26 on growth, rhizosphere dynamics, nutrient status, and yield of the kidney bean cultivated in Indian Central Himalaya

Abstract

Kidney bean (Phaseolus vulgaris) productivity and nutritional quality are declining due to less nutrient accessibility, poor soil health, and indigent agronomic practices in hilly regions, which collectively led to a fall in farmer’s income, and to malnutrition in consumers. Addressing such issues, the present investigation was designed to assess the impact of Pseudomonas jesenii MP1 and Pseudomonas palleroniana N26 treatment on soil health, microbial shift, yield, and nutrient status of the kidney bean in the Harsil and Chakrata locations of Indian Central Himalaya. P. jesenii MP1 and P. palleroniana N26 were characterized as cold adaptive PGPR as they possessed remarkable in vitro plant growth promoting traits. Further, field trial study with PGPR treatments demonstrated remarkable and prolific influence of both strains on yield, kidney bean nutrient status, and soil health at both geographical locations, which was indicated with improved grain yield (11.61%–23.78%), protein (6.13%–24.46%), and zinc content (21.86%–61.17%) over control. The metagenomic study revealed that use of bioinoculants also concentrated the nutrient mobilizing and plant beneficial microorganisms in the rhizosphere of the kidney bean. Moreover, correlation analysis also confirmed that the plant growth-promoting traits of P. jesenii MP1 and P. palleroniana N26 are the basis for improved yield and nutrient status of the kidney bean. Further, cluster and principal component analysis revealed that both P. jesenii MP1 and P. palleroniana N26 exhibited pronounced influence on yield attributes of the kidney bean at both the locations. At the Harsil location, the P. jesenii MP1-treated seed demonstrated highest grain yield over other treatments, whereas at Chakarata, P. jesenii MP1, and P. palleroniana N26 treatment showed almost equal enhancement (~23%) in grain yield over control. The above results revealed that these bioinoculants are efficient plant growth promoters and nutrient mobilizers; they could be used as green technology to improve human health and farmer’s income by enhancing soil health, yield, and nutrient status of the kidney bean at hilly regions.

Impact assessment of cold-adapted Pseudomonas jesenii MP1 and Pseudomonas palleroniana N26 on Phaseolus vulgaris yield and soil health

“…It shows that bioinoculants were able to sustain and perform better at higher altitudes. Recently, our group analyzed the agronomical parameters and soil microbial diversity for the second consecutive cropping year too of the present study (Khan et al, 2023). They have observed similar results in which MP1 and N26 have enhanced approx 23% of grain yield during the second consecutive year of cropping.…”

“…Afterward, Rajwar et al (2018) and Joshi et al (2019) documented the nutrient solubilizing potential and thereby crop growth and yield-improving potential of Pseudomonas jesenii MP1 for Chickpea under field conditions at the Crop research center, Pantnagar. Apart from this, Khan et al (2023) also documented the yield, soil health, and nutrient biofortifying ability of both bacterial isolates under field conditions. Both bacterial isolates have significantly established their crop-improving potential therefore in the present study, they were directly applied to the farmer's field to evaluate their real-time performance.…”

Assessment of zinc-solubilizing bacterial isolates for plant growth promoting traits and water stress tolerance behaviour

“…The results, summarized in the [3,6,7] . Zinc plays a crucial role in plant growth, and the ability of soil microorganisms to solubilize this essential nutrient is a critical trait.…”

“…characterized by the formation of a distinct halo zone around bacterial colonies (Gontia-Mishra et al, 2017;Kamran et al, 2017;Khan et al, 2023) …”

Core bacterial communities dominated Purus frumentum biomass under different green manure returning amounts in saline-alkali soil

“…Gemmatimonas, for example, is associated with the decomposition of complex organic matter and the cycling and transformation of soil nutrients, such as carbon, nitrogen, and phosphorus (Xu et al, 2023). Pseudomonas, a common growth promoting bacterium in the rhizosphere, is closely related to lignin degradation and plant health (Khan et al, 2023). Povaliactor has demonstrated tolerance to metal elements in soil ecological restoration (Deng et al, 2020).…”