Manohar Jebakumar Ravikumar
@ksrcas.edu
Assistant Professor
KS Rangasamy college of Arts and Science
EDUCATION
PhD in Biotechnology
RESEARCH INTERESTS
Plant pathology, Molecular Virology, genetic engineering, Plant tissue culture
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Panneerselvam Krishnamurthy, Manohar Jebakumar Ravikumar, Salini Arumugam Palanivelu, Ramanujam Pothiraj, Backiyarani Suthanthiram, Uma Subbaraya, and Hiroyuki Morita
Springer Science and Business Media LLC
Ramanujam Pothiraj, Manohar Jebakumar Ravikumar, Backiyarani Suthanthiram, Uma Subbaraya, and Panneerselvam Krishnamurthy
Elsevier BV
Ramasamy Selvarajan, Veluswamy Balasubramanian, Perumal Priyanka, Ravikumar Manohar Jebakumar, Kanichelvam Prasanya Selvam, and Subbaraya Uma
Springer Science and Business Media LLC
Ravikumar Manohar Jebakumar, Velusamy Balasubramanian, and Ramasamy Selvarajan
Springer Science and Business Media LLC
Ravikumar Manohar Jebakumar and Ramasamy Selvarajan
Informa UK Limited
ABSTRACT Rhizospheric and endophytic bacteria isolated from the roots and corms of banana were tested to find out their efficiency in controlling against banana bunchy top virus (BBTV). Bioformulations of mixtures of endophytic Bacillus pumilus and B. subtilis isolated from banana cv. Grand Naine and rhizobacterial isolate Pseudomonas fluorescens (Pf1) were found to be effective in increasing the growth and physiological parameters such as pseudostem girth and height, number of leaves, phyllochron, and leaf area in biohardened plants under greenhouse study. The consortia of bioformulation mixture of B. pumilus, B. subtilis, and P. fluorescens I showed 61.62% disease reduction over control. The defence enzymes such as peroxidase (POX), polyphenol oxidase (PPO), phenylalanine ammonia lyase (PAL), and total phenol were induced to an elevated level in biohardened plants. The applications of bioformulations to plants led to delay the symptom expression for 63.75 to 70.50 days compared to control after challenge inoculation with the virus in 34–67% of plants that exhibited the symptoms till 150 DAI. However, biohardening of plants with the same combinations of bacteria three days after BBTV inoculation led to express the symptoms 29.16 to 36.71 days and there was a significant decrease in plant growth parameters. Biopriming prior to BBTV infection has attributed to the enhanced plant growth and resistance against BBTV whereas, the same treatments after virus inoculation did not induce resistance. This study has proved that the time of application of consortia of bio-inoculants determines their effect of induced resistance to BBTV in micropropagated plants.