Abstract
In the present study we examined the effect of nanogypsum and Pseudomonas taiwanensis strain BCRC 17751on plant and soil health using conventional and metagenomics approaches. Soil physicochemical properties and agronomical parameters of maize plants were reported to be better when applied with nanogypsum and bacterial inoculum together. When compared to control a significant increase in total bacterial counts, nitrogen, phosphorus, potassium (NPK) solubilizing bacterial population and soil enzyme activities (fluorescein diacetate, alkaline phosphatase, dehydrogenase, β-glucosidase, arylesterase and amylase) was reported in treatments. The metagenomics studies revealed dominance of beneficial bacteria such as Proteobacteria, Bacteriodetes, Planctomycetes, Acidobacteria and Nitrospirae in treated soil. On the other hand some novel bacterial diversity was also reported in treated soil which was evident from presence of taxonomically unclassified sequences. Hence, it can be concluded that combined application of nanogypsum and Pseudomonas taiwanensis in maize help in improving the structure and function of soil which affects the plant health without causing any toxic effect. However, in situ validation of the prescribed treatment is required under field conditions on different crops in order to give maximum benefits to the farmers and the environment.
Highlights
Agriculture system has observed dramatic changes since the time of its inception
Bacterial culture (PC1-Pseudomonas taiwanensis strain BCRC 17751, accession number MK106029) used in the present study was recovered from an agriculture field of GBPUA&T, Pantnagar
Seed germination was invariably high in treated soil and highest percent (97%) seed germination was recorded in combined treatment of nanogypsum and Pseudomonas taiwanensis (PC1 +NG)
Summary
Agriculture system has observed dramatic changes since the time of its inception. It started with domestication of several wild plant species to small-scale traditional farming and large scale intensive farming with the involvement of chemicals and hybrid seeds. Impact of nanogypsum and Pseudomonas taiwanensis on maize plant health and its rhizospheric microbiome new technologies with positive impact on the environment are always in demand in agriculture sector to produce sufficient food. These technologies must be accessible and cost effective for the farmers. Zea Mays is generally main short term crops with good nutritive qualities. It is used as a model crop for research purpose especially in the field of plant-microbe interactions [2]
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