Papers by susmita goswami
Journal of Plant Protection Research
The phyllosphere refers to the entire aerial habitat of plants while phylloplane describes the en... more The phyllosphere refers to the entire aerial habitat of plants while phylloplane describes the entire leaf surface. The phylloplane provides a niche for diversified microbial communities and as such it is an important ecosystem both ecologically and economically. For many years, phylloplane dwellers have been studied as bio protectants and enhancers of growth in host plants. Plants and phylloplane-microbial-interactions result in increased fitness and productivity of agricultural crops. In this study, an attempt was made to compile previous studies in order to better understand the role of phylloplane microbiota in influencing the physiology of flora. We also proposed possible further research to explore molecular aspects of signaling mechanisms established by the phylloplane microbial community with their hosts which impact the latter's physiology.
PLANT ARCHIVES, 2021
An array of microbes colonise surface of leaves where they interact with cells and influence the ... more An array of microbes colonise surface of leaves where they interact with cells and influence the physiology and biochemistry of the host plant. Inthepresent study, Aspergillus niger a dominant phylloplane microfungus, isolated from leaves of field grown tomato plants was inoculated on aseptically raised plants of tomato. The inoculated and non-inoculated leaves were sampled at 0, 24, 48, 72 and 96 hours intervals, and subjected to treatment withformaldehyde (37%) for crosslinking of proteins. Cell wall and cytoplasmic proteins were extracted from crosslinked and non-crosslinked samples of both control and A. niger inoculated plants. The proteins were isocratically separated on SDS-PAGE. Cell wall proteins were observed to be suppressed or expressed in samples from 24 to 96 hours post inoculation with A. niger. After 24, 48 and 96 hours of inoculation, enhanced expression of proteins were observed. However, after72 hours, the protein detected in control sample was not observed in treated sample. Similarly, cytoplasmic proteins were also overexpressed in non-crosslinked treated samples at 72 hours and 96 hours post inoculation. Electrophoretic separation demonstrated crosslinking of proteins in A.niger treated samples. Thus, the results demonstrated that phylloplane microbes are not a static entity on leaf surface rather actively interact with cells and influence their macro-molecular composition. Such interactions could be crucial for the physiology of host tissue.
Journal of Plant Protection Research, 2019
Phylloplane microbes have been studied as strategic tools in management against plant pathogens. ... more Phylloplane microbes have been studied as strategic tools in management against plant pathogens. Non-pathogenic bacteria and fungi have been applied as crop protectants against various plant diseases. The present study aimed at evaluating the potentiality of Aspergillus niger spores in altering the activity of four key enzymes related to defense in tomato. The experiment was designed such that two groups of 50 tomato plants were considered: group 1 – sprayed with autoclaved distilled water (control) and group 2 – sprayed with A. niger spores. Spraying was carried out under aseptic conditions. The experimental parameters included analysis of the activity of peroxidase (POX), polyphenol oxidase (PPO), phenylalanine ammonia lyase (PAL) and tyrosine ammonia lyase (TAL) as well as expression of POX and PPO isoforms. The results demonstrated an inductive effect of A. niger on the activity of POX, PPO, PAL and TAL. Enhanced expression of POX and PPO isoforms was also observed. The results ...
World Academy of Science, Engineering and Technology, International Journal of Bioengineering and Life Sciences, 2017
World Academy of Science, Engineering and Technology, International Journal of Bioengineering and Life Sciences, 2017
Plant growth promoting rhizobacteria are the soil bacteria inhabiting around the root surface and... more Plant growth promoting rhizobacteria are the soil bacteria inhabiting around the root surface and are directly or indirectly involved in promoting plant growth and development via production and secretion of various regulatory chemicals in the vicinity of rhizosphere. Generally, plant growth promoting rhizobacteria facilitate the plant growth directly by either assisting in resource acquisition (nitrogen, phosphorus and essential minerals) or modulating plant hormone levels, or indirectly by decreasing the inhibitory effects of various pathogens on plant growth and development in the forms of biocontrol agents. Various studies have documented the increased health and productivity of different plant species by the application of plant growth promoting rhizobacteria under both normal and stressed conditions. The plant-beneficial rhizobacteria may decrease the global dependence on hazardous agricultural chemicals which destabilize the agro-ecosystems. This review accentuates the percep...
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Papers by susmita goswami