Integrated use of Rhizobium leguminosarum, Plant Growth Promoting Rhizobacteria and Enriched Compost for Improving Growth, Nodulation and Yield of Lentil (Lens culinaris Medik.)

Abstract

Maintenance of high bacterial population in the rhizosphere improves the efficiency of these organisms. This high bacterial population can be maintained by the application of enriched compost which supports their growth and activities. Thus integrated use of Rhizobium, plant growth promoting rhizobacteria (PGPR) containing 1-aminocyclopropane-1-carboxylate deaminase (ACC-deaminase) and P-enriched compost (PEC) could be highly effective for promoting growth, nodulation, and yield of lentil (Lens culinaris Medik.). A field study was conducted to evaluate the potential of Rhizobium, PGPR containing ACC-deaminase and PEC for promoting growth of lentil. For this study, the soil type was sandy clay loam soil having pH 7.6; EC (electrical conductivity) 2.8 dS m -1 ; organic matter (OM) 0.59%; total N 0.032%; available P 7.9 mg kg -1 , and extractable K 129 mg kg -1 . Treatments were replicated thrice, using randomized complete block (RCB) design. Results showed that the integrated use of R. leguminosarum with Pseudomonas spp. containing ACC-deaminase along with PEC was highly effective and caused up to 73.5, 73.9, 74.4, 67.5, 73.3, 65.8, 40.5, and 52.5% increase in fresh biomass, grain yield, straw yield, pods plant -1 , nodule plant -1 , nodule dry weight plant -1 , 1000-grain weight, and N content in grain of lentil, respectively, as compared to respective control. It is concluded that integrated use of R. leguminosarum with Pseudomonas spp. having trait ACC-deaminase plus PEC would be an effective approach for better nodulation which consequently improved yield of lentil under natural conditions.

Response of groundnut (Arachis hypogaea L.) to plant growth promoting Rhizobacteria in degraded soils

“…This increase in the availability of plant nutrients may also be explained by the production of organic acids by plant roots and bacteria in the rhizosphere which in turn stimulated the availability of plant nutrients through the biodegradation of FYM. The findings obtained in this study are supported by a number of previous studies (Jilani et al, 2007;Kumar et al, 2011;Iqbal et al, 2013).…”

Plant Growth Promoting Rhizobacteria (PGPR): Current and Future Prospects for Development of Sustainable Agriculture

“…The enzyme 1-aminocyclopropane-1 carboxylic acid (ACC) is a pre-requisite for ethylene production, catalyzed by ACC oxidase. Iqbal MA et al [40] reported improved nodule number, nodule dry weight, fresh biomass, grain yield, straw yield, and nitrogen content in grains of lentil as a result of lowering of the ethylene production via inoculation with plant growth promoting strains of Pseudomonas sp. containing ACC deaminase along with R. leguminosarum.…”

Role of plant growth promoting rhizobacteria in sustainable production of vegetables: Current perspective

“…Increase in Fe content of both crops was attributed to the production of siderophores by R. leguminosarum strain PEPV16. When used as mixture, the composite rhizobial inoculant provides multiple benefits to crops in addition to their normal physiological activity of N fixation (Iqbal et al, 2012). And hence, the synergistic effects of rhizobia and other free living PGPR/AM-fungi have been found more effective than single inoculation and massively increases vegetables production largely due to enhanced synthesis of phytohormones and nutrient absorption and mobilization (Reimann et al, 2008;Yu et al, 2012).…”