Bacillus subtilis NRRL B‐30408 inoculation enhances the symbiotic efficiency of Lens esculenta Moench at a Himalayan location

Abstract

Field-based experiments were conducted to evaluate the promotion abilities of Bacillus subtilis NRRL B-30408 for growth of lentil (Lens esculenta Moench) at a mountain location of Indian Himalaya in two consecutive years. Observations were recorded for plant growth, yield, nodulation, root colonization by arbuscular mycorrhizal and endophytic fungi, and other related parameters. A positive influence of bacterial inoculation on plant biomass and yield-related parameters was recorded in both years. The significant increase in growth and nodule numbers as well as leghaemoglobin and protein concentrations of nodules indicated an enhancement in efficiency of the Rhizobium-legume symbiosis due to bacterial inoculation. An increase in protein concentration was also recorded for shoots, leaves, and seeds. Due to bacterial inoculation, there was an increase in colonization by endophytic fungi and a simultaneous decrease in colonization by arbuscular mycorrhizal fungi in roots. Based on the results of this field study, inoculation with suitable plant growth-promoting rhizobacteria instead of dual inoculation is suggested as a better option for improving the yield and related attributes of a primary dietary legume such as lentil.

A psychrotolerant strain of Serratia marcescens (MTCC 4822) produces laccase at wide temperature and pH range

“…The microbial diversity of IHR is increasingly gaining attention mainly due to their ecological resilience based applications, such as production of secondary metabolites often higher at suboptimal conditions (Mishra et al 2012; Rinu et al 2012; Yarzábal 2014). Amongst bacteria, species of Bacillus , Pseudomonas and Serratia have been isolated and studied for their various biotechnological applications (Pandey et al 1999, 2001, 2006; Malviya et al 2012; Rinu and Pandey 2009; Selvakumar et al 2008; Trivedi et al 2007; Trivedi and Pandey 2008). Serratia marcescens MTCC 4822, characterized in the present study for its tolerance to low temperature, wide pH and high salt concentration, has been investigated for laccase production- an enzyme of ecological as well as biotechnological relevance.…”

Mycorrhizosphere: The Role of PGPR

“…Multitrophic interactions involving other microorganism, such as PGPR, have been analysed in different studies, which describe how these bacteria enhance the beneficial effects of the legume microsymbionts and enhanced dry matter yield, N concentration and total N yield (Azcón 1993;Bisht et al 2009;Rinu and Pandey 2009).…”

Alleviation of salinity and metal stress using plant growth-promoting rhizobacteria isolated from semiarid Moroccan copper-mine soils

“…(Pandey 2009;Singh et al 2015;Wang et al 2019;Khan et al 2017). These bene cial microorganisms improve plant performance by using various mechanisms, such as solubilization of soil nutrient, production of plant growth hormones and suppression of stress due to ethylene production(Ma et al 2016;Din et al 2019;Mahmoud et al 2020).…”