Analysis of Phosphate Solubilizing Bacteria in Soil

Analysis of Phosphate Solubilizing bacterium in Soil1. mental homeCereals argon the worlds major source of food for piece nutrition and strain (Oryza sativa L.) is one of the predominant cereal craw and wreak staple diet for to a greater extent than two fifth of the world population. To provide the ever increasing human population, the worlds yearly rice manufacturing to be bound by an obligation act out of 560 trillion tonnes to 760 million tonnes by 2020. The future sum up in rice toil has to come from the same or even reduced land sweep and the productivity grant (per ha) must be greatly enhanced by providing summateitional nutrient input and through with(predicate) erective control of phytopathogens. cop disease of rice caused by Pyricularia oryzae is one of the most destructive fungal diseases of rice causing loss up to 90% and has a omni fork over occurrence in almost all the rice growing countries (Mehrothra, 1980). atomic figure of speech 15 has been called the key of feeling because it is directly knobbed in most of the life processes. Next to newton it is invariably classified as one of the macronutrients and it is a key element in frequency of use as fertilizer. It serves as a primary energy source for microbial oxidation. It is a division substance in life processes. Soil cannot give high rewards if it is insufficient in ortho orthophosphate.Different mechanisms slang been suggested for the solubilization of in innate phosphorus by phosphate solubilize. It is usually received that the outstanding mechanism of mineral phosphate solubilization is the presence of organic acids the combination of various thing into one whole by primer coat microorganisms (Halder et al., 1990). Manufacturing of organic acids results in acidification of the microbial cell and its lying on the outskrits.Resultant, inorganic phosphate may be released from a mineral phosphate by proton addition for Calcium ion (Goldstein, 1994). The production o f organic acids by PSB has been plenteous notifified. Among them, gluconic acid seems to be the most repeated occurance agent of mineral phosphate solubilization.Being an in specified microorganism is known to be involved in the solubilization of insoluble phosphates (Alexander, 1977). These phosphate-solubilizing microorganisms render insoluble phosphate into soluble grouping form completely the series of acidification and chelation of some reactions. This process not single compensates for higher cost of manufacturing fertilizers in industry but also mobilizes the fertilizers added to dishonor (Rodriguez and Reynaldo, 1999). Therefore, many researchers have tried to increase the gear up-available phosphate fraction by means of Phosphate solubilizing microorganisms (PSMs) such as Achromobacter sp, Agrobacterium sp, Alcaligens sp, atomic number 5 cereus, B. polymyxa, B. megaterium, B. subtilis, genus Pseudomonas striata and Xanthomonas sp and Fungi like Aspergillus niger, A. f lavus, A. fumigatus, Penicillium sp. and Rhizopus sp.Several mechanisms of works microbe interaction may equivalenceticipate in the association and fall upon found result, including IAA, Siderophore production and biocontrol against Pyricularia oryzae. Thus, the define Growth Promoting Rhizo bacterium (PGPR) affect the plant growth through direct promotion by producing plant growth promoting substances and through indirect promotion by acting against plant pathogenic microorganisms (Kloepper et al., 1989).Plant growth promoting rhizobacteria (PGPR) argon free living, soil borne bacteria, which enhance the growth of the plant either directly or indirectly (Kloepper et al., 1980 Glick and Ibid, 1995). The direct mechanisms involve nitrogen fixation, phosphorus solubilization, HCN production, manufacturing of phytohormones such as auxins, cytokinins and gibberellins, and lowering of ethylene concentration (Glick and Ibid, 1995 Glick et al., 1999). Bacteria belonging to the gen era Azospirillum, Pseudomonas, Xanthomonas, and Rhizobium as good as Alcaligenes faecalis, Enterobacter cloacae, Acetobacter diazotrophicus and Bradyrhizobium japonicum have been shown to that which is produced auxins which dish in inducing plant growth increase (Patten and Glick, 2002).There are many reports on plant growth promotion and military issue enhancement by plant growth promoting rhizobacteria (PGPR) (Lugtenberg et al., 2001). The mechanisms of plant growth increase the promotion by PGPR include the ability to produce phytohormones, N2 fixation, distaste against phytopathogens and solubilization of insoluble phosphates (Lugtenberg and Kamilova, 2009). It was also suggested that the PGPR can also prevent the deleterious make of stresses from the environment (Paul and Nair, 2008).composting is a biotechnological process by which different microbial communities change over organic countervails into a stabilized form. During the process, temperatures arise because of the heat released due to biologic activeness. These temperatures are responsible for pathogen inactivation. converting is an aerobic process that requires O2, optimal moisture and seemly free air space and CN ratio indoors certain limits. The give-and-take by converting leads to the development of microbial populations, which causes numerous physicochemical changes within diversity. These changes could influence the ad motley distribution through release of sullen metals during organic social occasion mineralization or the metal solubilization by the decrease of pH, metal biosorption by the microbial biomass or metal complexation with the newly form humic substances or other factors (Rahul Kumar et al., 2010).One of the most effective means of cycle any organic wastes for agricultural use is by means of composting, an accepted practice in India and elsewhere. In many cases in India, it is valuable to add nutrients to compost to increase its fertilizer value. Although, su gar industry wastes are relatively high in nitrogen, calcium, atomic number 12 and potassium, they are generally deficient in phosphorus, iron and zinc when com com equivalenceabilityed to fertilizers commonly used in India. Further, the possibility of enriching organic wastes with micronutrients like Fe and Zn, which have become critical in crop production, have been studied and their effectiveness is increased appreciably through unite application of organics with FeSO4 and ZnSO4 in addition to N, P, K fertilizers (Deepa Devi, 1992 Sennimalai, 1994). Therefore, it is appropriate to develop composting systems that are capable of converting these agroindustrial wastes into valuable organic fertilizers.Among the microbes, bacteria are the most important one for decomposing waste. Bacteria use press mud for their metabolism and in conclusion they produce some simple and useful compounds from them which are important for soil health, plant growth and over all to keep well proportion of natural ecosystem (Zaved et al., 2008). Moreover, efficiency of bacterial in bioconversion or organic compounds is well documented (Petre et al., 1999 Suhaimi et al., 2012). Unfortunately, knowledge on physico-chemical and microbial diversity of bacteria on bioconversion of sugar cane press mud is limited. Therefore, this study was conducted to monitor the chemical and biological changes during composting of sugar cane press mud with cattle manure in order to concentrate high quality stabilized product within the goal of trim back the stabilization time.The pressmud biocompost contains appreciable amount of plant nutrients viz., organic carbon, nitrogen, phosphorus, potassium, calcium and magnesium along with traces of micronutrients viz., Zn, Fe, Cu and Mn (Banulekha, 2007). The beneficial effect of the organic intimacy for enhancing the soil fertility and thereby improving the crop productivity is well established (Laird et al., 2001).Objectives of the present studyTo co llect the soil samples from ten different locations in Cuddalore district, Tamil Nadu, India.To isolate and identify the Phosphate solubilizing bacteria ( vitamin B complex subtilis, barn megaterium, Enterobacter asburiae) from collected soil samples.To screen the efficient Phosphate solubilizing bacterial isolates name on production of plant growth promoting substances.composting of sugar mill waste (pressmud) by Phosphobacterial isolates and analysis of nutrient status of compost mixs.To study the combine effect of efficient phosphobacterial isolates and compost mixture for the growth and yield of rice paddy field BPT-5804(Oryza sativa L.)Cellulose, hemicellulose and lignin become or make less indicate in the present study during the bacterial family based composting process. Singh and Sharma (2002) reported rapid depravation of wheat straw with a mixture of cellulolytic fungi, Pleurotus sajor-caju, Trichoderma reesei, Aspergillus niger along with nitrogen fixing bacteria Azotobacter chroococcum. The simulated activity of bacterial consortium present in the waste substrate ability to do have characterised by intensity cellulolysis and lignolysis as advised done by Loquet et al. (1984).Hemicellulosic oddment of pressmud contains a large quantity of xylans. Xylanase are enzymes that are capable of contaminating xylan units yielding large quantities of monomeric xylose units. The xylanases activities during composting. The xylanase activity in all the interpositions was found to be on the 30th day and thereafter a aggressively decline was noticed. During nine-spottieth days supreme xylanase activity preserve in CM 8 (Pressmud + Bacillus subtilis + Bacillus megaterium + Enterobacter asburiae) (5.91 U ml-1 of protein) followed by CM -5 (4.93 U ml-1 of protein), CM 6 (3.91 U ml-1 of protein), CM 3 (3.89 U ml-1 of protein), CM 2 (3.00 U ml-1 of protein), CM 4 (2.92 U ml-1 of protein) and CM 6 (2.00 U ml-1 of protein). The marginal amount of xy lanase activity record in CM 1 (pressmud alone) (1.82 U ml-1 of protein).The survival and microbial activity during the absolute composting process was studied by estimating dehydrogenase activity. During 90th day, maximum dehydrogenase activity record in CM 8 (Pressmud + Bacillus subtilis + Bacillus megaterium + Enterobacter asburiae) (3.09 mg formazon formed h-1 g-1) followed by CM 7 (2.95 mg formazon formed h-1 g-1), CM 6 (2.39 mg formazon formed h-1 g-1), CM 5 (2.30 mg formazon formed h-1 g-1), CM 4 (1.71 mg formazon formed h-1 g-1), CM 3 (1.70 mg formazon formed h-1 g-1) and CM 2 (1.68 mg formazon formed h-1 g-1). Lower amount of dehydrogenase activity recorded in CM 1 (Pressmud alone) (1.00 mg formazon formed h-1 g-1).In general, percentage cellulose simplification increased thereafter decrease in the terminus of decomposition in press mud up to end of 90days. The sign cellulose content of pressmud was 15.75 % explained. During 90th day, maximum cellulose reductio n recorded in CM 8 (Pressmud + Bacillus subtilis + Bacillus megaterium + Enterobacter asburiae) (3.81%) followed by CM 5 (3.88%), CM 6 (3.99%), CM 7 (4.09%), CM 3 (4.2%), CM 2 (4.62%) and CM 4 (4.65%). The minimum cellulose reduction recorded in CM 1 (pressmud alone) (5.62%).Changes in reduction of hemicellulose content during composting of pressmud are studied. From the results, it was noticed that the reduction of hemicellulose content increased thereafter decreased in all treatments. During 90th day, reduction in hemicellulose content recorded in CM 8 (Pressmud + Bacillus subtilis +Bacillus megaterium + Enterobacter asburiae) (7.76%) followed by CM 6 (7.85%), CM 5 (7.90%), CM 7 (7.92%), CM 3 (7.95%), CM 2 (9.22%) and CM 4 (9.37%). Least amount of reduction in hemicellulose content recorded in CM 1 (Pressmud alone) (13.00%).Inoculation levels were found to have square effect on reduction in lignin content. During 90th day, reduction of lignin content in triple ino culants compost mixture recorded in CM 8 (Pressmud + Bacillus subtilis +Bacillus megaterium + Enterobacter asburiae) (6.10%), followed by CM 5 (6.31), CM 6 (6.64%), CM 7 (6.69%), CM 2 (6.81%), CM 2 (7.60%) and CM 4 (7.70%). The last reduction in lignin content recorded in CM 1 (Pressmud alone) (8.24%).Faryal et al. (2006) have suggested the effects of inoculation with three thermophilic species of Bacillus on the composting activity of drainage water that passes through sewers sludge amend with black combustible mineral fly the grey soft dust as the causer or source.The bacteria population present in the compost mixtures were estimated quantitatively during the 90th day. In all the treatments the bacterial population was more in CM 8 (29.32 106 cfu g-1) and less in CM-1 (15.00 106 cfu g-1).The effect of convert mixture (Pressmud + Bacillus subtilis + Bacillus megaterium + Enterobacter asburiae) and Phosphate solubilizing bacteria on plant height of paddy var BPT 5804 (Oryza sativa L.) was measured. Among the various treatments tested, the highest plant height was recorded in the treatment T8 (75% NPK + Compost Mixture 8 + BS + BM + EA) (121 .98 cm). The least plant height was recorded in T9 (Control) (89.30 cm).The effect of Compost mixture (Pressmud + Bacillus subtilis + Bacillus megaterium + Enterobacter asburiae) and Phosphate solubilizing bacteria on teetotal matter production of paddy var BPT 5804 (Oryza sativa L.) was investigated. Among the nine treatments tested, the dry matter production was maximum in treatment T8 (75% NPK + CM+BS+BM+EA) (8.12 t ha-1). The final chlorophyll content was recorded in T9 (Control) (4.00 t ha-1).The effect of Compost mixture (Pressmud + Bacillus subtilis + Bacillus megaterium + Enterobacter asburiae) and Phosphate solubilizing bacteria on Leaf area index at florescence of paddy var BPT 5804 (Oryza sativa L.) was investigated. Among the nine treatments tested, the Leaf area index at flowering was maxim um in treatment T8 (75% NPK + CM+BS+BM+EA) (6.42 cm). The lowest grain yield was recorded in T9 (Control) (3.98cm).The Compost mixture (Pressmud + Bacillus subtilis + Bacillus megaterium + Enterobacter asburiae) and Phosphate solubilizing bacteria on chlorophyll content of paddy var BPT 5804 (Oryza sativa L.) was investigated. Among the nine treatments tested, the chlorophyll content was maximum in the treatment T8 (75% NPK + CM+BS+BM+EA) (3.09 mg/g of leaf). The lowest chlorophyll content was recorded in T9 (Control) (3.00 mg/g of leaf).The effect of Compost mixture (Pressmud + Bacillus subtilis + Bacillus megaterium + Enterobacter asburiae) and Phosphate solubilizing bacteria on number of tillers plant1 of paddy var BPT 5804 (Oryza sativa L.) was investigated. Among the nine treatments tested, the number of tillers plant -1 was maximum in treatment T8 (75% NPK + CM+BS+BM+EA) (18.86). The treatment T1 (100% NPK) (18.52) was on par with the treatment T8. The lowest tillers plant1 was recorded in T9 (Control) (10.56).The effect of Compost mixture (Pressmud + Bacillus subtilis + Bacillus megaterium + Enterobacter asburiae) and Phosphate solubilizing bacteria on emergence of tillers panicles hammock -1 of paddy var BPT 5804 (Oryza sativa L.) was investigated. Among the nine treatments tested, the Number of tillers panicles hill -1 was maximum in treatment T8 (75% NPK + CM+BS+BM+EA) (6.37). The treatment T1 (100% NPK) (6.01) was on par with the treatment T8. The minimum tillers panicles hill -1 was recorded in T9 (Control) (3.00).The effect of Compost mixture (Pressmud + Bacillus subtilis + Bacillus megaterium + Enterobacter asburiae) and Phosphate solubilizing bacteria on Number of filled grains panicles -1 of paddy var BPT 5804 (Oryza sativa L.) was investigated. Among the nine treatments tested, the Number of filled grains panicles-1 was maximum in treatment T8 (75% NPK + CM+BS+BM+EA) (73.03). The treatment T1 (100% NPK) (72.78) was on par with the treatm ent T8. The lowest filled grains panicles-1 was recorded in T9 (Control) (57.24).The effect of Compost mixture (Pressmud + Bacillus subtilis + Bacillus megaterium + Enterobacter asburiae) and Phosphate solubilizing bacteria on Number of thousand grain weight of paddy var BPT 5804 (Oryza sativa L.) was investigated. Among the nine treatments tested, the No of thousand grain weight was maximum in treatment T8 (75% NPK + CM + BS + BM + EA) (21.56). The treatment T1 (100% NPK) (21.01) was on par with T8. The minimum grain weight was recorded in T9 (Control) (14.23).The effect of Compost mixture (Pressmud + Bacillus subtilis + Bacillus megaterium + Enterobacter asburiae) and Phosphate solubilizing bacteria on grain yield and straw yield of paddy var BPT 5804 (Oryza sativa L.) was investigated. Among the nine treatments tested, the grain yield and straw yield content was maximum in treatment T8 (75% NPK + CM + BS + BM + EA) (47.36), (63.76) and the treatment T1 (100% NPK) (46.88), (63.2 4) was on par with the treatment T8. The lowest grain yield was recorded in T9 (Control) (25.23), (49.76).The effect of Compost mixture and Phosphate solubilizing bacteria on nutrients phthisis (N, P K) was determined. Among the treatments tested, maximum NPK aspiration was recorded in the treatment T8 (75% NPK + BS + BM + EA) (121.56 kg ha-1), (22.86 kg ha-1), (118.73 kg ha-1). The treatment T1 (100% NPK) (121.02 kg ha-1), (22.41 kg ha-1) and (118.31 kg ha-1) was on par with the treatment T8. The lowest NPK was recorded in T9 (Control) (92.85 kg ha-1), (11.77 kg ha-1) and (89.82 kg ha-1).The effect of Compost mixture and Phosphate solubilizing bacteria on nutrients uptake (N, P K) was determined. Among the treatments tested, maximum NPK uptake was recorded in the treatment T8 (75% NPK + BS + BM + EA) (72.85 kg ha-1) (18.73 kg ha-1) and (81.67 kg ha-1). The treatment T1 (100% NPK) (72.43 kg ha-1), (18.51 kg ha-1) and (81.47 kg ha-1) was on par with T8. The minimum NPK was recorde d in T9 (Control) (46.21 kg ha-1), (08.05 kg ha-1) and (56.12 kg ha-1)The effect of Compost mixture and Phosphate solubilizing bacteria on bacterial population was studied. Highest bacterial population was recorded in the treatment T8 (Bacteria 36.66 106 cfu g-1 and the lowest bacterial population (19.27 106 cfu g-1).