Efficacy of Micronutrients in Influencing Growth Behavior of Rhizobium of Pigeonpea (Cajanus cajan L. [Millsp.])

Abstract

The present investigation was conducted to observe the effect of various concentrations (0.1 to 1.5 gm/100ml) of micronutrients (Zn, Mn, B, Cu, Mo, Fe) with yeast extract mannitol media on agriculturally important Rhizobium species isolated from root nodules of Cajanus cajan and to determine the effect of multi-micronutrient yeast extract mannitol media prepared of maximum growth concentrations of micronutrients on rhizobial growth. Concentrations of Zn (0.1%), Mn(0.3%), B(0.1%), and Mo(0.1%) with yeast extract mannitol media composition represented increased number of CFU against control. The growth of Rhizobium in multimicronutrient yeast extract mannitol media decreased by 25% compared to control.

Interactive Effects of Nutrients and Bradyrhizobium japonicum on the Growth and Root Architecture of Soybean (Glycine max L.)

“…The effects of nutrients present in growth media on Rhizobium -legume symbioses and nitrogen fixation have been reported (Olivera et al, 2004 ; Chaudhary et al, 2008 ). Rhizobia require adequate mineral nutrients, such as carbon, nitrogen, phosphorus, potassium, magnesium, and several microelements for the metabolism involved in invading and successfully colonizing the host root system in order to establish an effective legume-plant host symbiosis (Paliya et al, 2014 ; Egamberdieva et al, 2016 , 2017 ; Chen et al, 2017 ). In the rhizosphere, high competition for nutrients and niches occurs among various kinds of organisms, including the indigenous microflora, and rhizobia colonization depends on nutrient availability (Kuzyakov and Xu, 2013 ).…”

Interactive Effects of Biochar, Nitrogen, and Phosphorous on the Symbiotic Performance, Growth, and Nutrient Uptake of Soybean (Glycine max L.)

“…Nutrient interactions in soil are complicated and paramount for nutrient uptake and plant growth [17][18][19]. Mineral nutrients such as N, P, and K, as well as several microelements, affect rhizobia-host symbiotic interactions in legumes such as nodule formation and root activity [20][21][22]. Nitrogen plays a vital role in leguminous plant physiological processes, whereas higher amounts of nitrogen inhibit the symbiotic performance of nitrogen fixation by rhizobia [23,24].…”

Evaluation of combined effect of micronutrients and rhizobial inoculation on mungbean productivity

“…Therefore a balance in micronutrient condition is also necessary in soil for higher crop productivity. Micronutrients play an important role in increasing yield of pulses and oilseed legumes through their effects on the plant itself and on the nitrogen fixing symbiotic process (Paliya et al, 2014). The quantum and quality of Rhizobium is a very basic requirement to enhance the production of food legumes in Asian continent, especially in India.…”