Influence of Plant Growth Promoting Rhizobacterial Inoculation on Wheat Productivity Under Soil Salinity Stress

Abstract

Soil salinity affects the growth and yield of crops. The stress of soil salinity on plants can be mitigated by inoculation of plant growth promoting bacteria (PGPR). The influence of PGPR inoculation on wheat (Triticum aestivum L.) crop productivity under salinity stress has not been properly addressed so far. Therefore, the present study was conducted to investigate the effects of various PGPR strains (W14, W10 and 6K; alone and combined) at several growth attributes of wheat plant under different soil salinity gradients (3, 6 and 9 dS m-1). The growth attributes of wheat (height, roots, shoots, spikes, grains quality, biological and economical yield, nutrients nitrogen, phosphorus and potassium in grains) were highly affected by salinity and decreased with increasing salinity level. The PGPR inoculation substantially promoted growth attributes of wheat and prominent results were observed in W14 × W10 × 6K treatment at all salinity levels. The results suggest that inoculation of PGPR is a potential strategy to mitigate salinity stress for improving wheat growth and yield.

Influence of Soil Phosphate on Rhizobacterial Performance in Affecting Wheat Yield

“…The positive effects of PGPR on plant health have been well documented in literature; however, the inherent complexity of PGPR interactions with the environment, native flora, and crop-specific conditions contributes to inconsistent outcomes [ 46 , 47 ]. To address these challenges, contemporary research efforts increasingly focus on the use of specific combinations of PGPR [ 23 , 48 – 50 ] with a wide spectrum of modes of action, that is sufficiently robust to counter environmental factors, [ 49 , 51 ]. For instance, recent studies by Calvo et al [ 52 ] have highlighted the efficacy of tailored PGPR blends in enhancing nutrient uptake and stress tolerance in various crop species.…”

Bioformulation of mineral solubilizing microbes as novel microbial consortium for the growth promotion of wheat (Triticum aestivum) under the controlled and natural conditions

“…Due to these difficulties farmers are using less biofertilizers as compared to alternative techniques. Therefore, some materials, known as carriers, have the ability to able the growth of microbes and release in the rhizosphere, which are essential for the booming application of inoculants [ 35 ]. Depending on their origin, carriers can be either organic (e.g., manure, biogas slurry, crushed corn cobs, charcoal, and peat) or inorganic (e.g., zeolite, perlite, lignite, and talc).…”

Role of Melatonin and Plant‐Growth‐Promoting Rhizobacteria in the Growth and Development of Plants

“…A number of interactions between Rhizobia and leguminous plants result in forming nodules. Factors affecting nodulation include physicochemical properties of the soil, compatibility of host and micro‐symbiont and the existence of bio‐molecules such as polysaccharides, flavonoides, and hormones . There are three categories of nitrogen fixation bacteria, symbiotic microbes like legume–Rhizobium symbiosis, asymbiotic or free‐living microbes like Azotobacter and associative symbiosis like Azospirillum .…”