Plant growth-promoting rhizobacteria from Ocimum basilicum improve growth of Phaseolus vulgaris and Abelmoschus esculentus

Plant Growth-Promoting Bacterium from Non-Agricultural Soil Improves Okra Plant Growth

“…This may indicate that DPM17 is a nitrogen-fixing bacterium and possesses a nitrogenase enzyme. This observation is in general agreement with those reported in other studies [11,34]. Nitrogen-fixing PGPB can significantly satisfy nitrogen requirements for plants, thus improving soil health and crop yield.…”

“…This observation is in general agreement with those reported for Bacillus spp. strains [33,34]. This indicates the versatility of the metabolic pathways of DPM17 and its significance in improving plant growth and yield via multiple mechanisms, including ammonia production with the help of the arginine dihydrolase enzyme or indirectly via acetoin production.…”

“…This PGPB trait of DPM17 is in accordance with that of Bacillus sp. [10,34]. Environmental stressors cause the generation of toxic free radicals, which attack vital macromolecules within organisms.…”

Growth Promotion of Phaseolus vulgaris and Arabidopsis thaliana Seedlings by Streptomycetes Volatile Compounds

“…In our in situ experiment, significant increases in the shoot fresh weight (11.64–43.92%), the shoot length (11.39–29.01%), the root fresh weight (80.11–140.90%), the root length (40.06–59.01%), the hypocotyl diameter (up to 6.35%), and the chlorophyll content (up to 10.0%) were observed in bean seedlings. AlAli et al [ 41 ] observed an increase of 55% in the primary root length of white bean plants ( P . vulgaris ) that were inoculated with Streptomyces sp.…”

Microbial consortium with nitrogen fixing and mineral solubilizing attributes for growth of barley (Hordeum vulgare L.)

“…Microbes, the tiny miracle are increasingly gaining attention for agriculture sustainability due to cost-effective and eco-friendly nature. Various groups of plant associated microbial strains have been reported for improving plant growth in normal and stressed environmental conditions such as Bacillus, Pseudomonas, and Rhizobium ( Afzal et al., 2017 ), Azospirillum brasilense ( Di Salvo et al., 2018 ), Oceanobacillus ( Albdaiwi et al., 2019 ), Streptomyces laurentii ( Kour et al., 2020 ), and Pseudomonas alcaliphila ( AlAli et al., 2021 ). Microbes living freely or in association with plant's different regions (rhizospheric, epiphytic and endophytic) promotes the growth of the host via direct and indirect PGP attributes such as fixation of atmospheric nitrogen; nutrients (P, K, Zn) solubilization and mobilization; production of siderophores (Fe chelating agent), plant growth regulators (auxin, abscisic acid, cytokinin, ethylene, gibberellins, jasmonic acid), ammonia, hydrogen cyanide, 1-aminocyclopropane-1-carboxylate (ACC), hydrolytic enzymes (protease, cellulase, amylase and chitinase) and various plant growth promoting bioactive compounds secondary metabolites ( Kaur et al., 2021 ; Kour et al., 2019 ).…”