1. Pathogen-derived elicitors for inducing resistance: A procedure has been standardized for preparation of pathogen-derived elicitor from the cell wall Fusarium oxysporum f. sp. lycopersici and also from the culture filtrate. As the pathogen-derived elicitors have specific receptors in plants, these elicitors may be used for inducing resistance against Fusarium oxysporum f. sp. lycopersici.
2. Use of hairy roots for studying plant-pathogen interaction: Elicitation of hairy root cultures of tomato with different elicitors evoked same response as was observed in normal roots.
3. Induction of systemic acquired resistance through elicitors: The results indicated that the induced resistance observed in tomato against Fusarium oxysporum f. sp. lycopersici and Ralstonia solanacearum might be a case of systemic acquired resistance. This is a novel endeavour for development of biomolecules which may lead to avoidance of pesticides.
4. Oxidative burst as indicator of plant susceptibility/resistance to pathogen
5. Establishing the biochemical basis for high susceptibility of tomato plants (cv Arka Saurabh) at flowering stage to Fusarium wilt
6. Accumulation of phenolics and lignin in high amounts, together with higher level activity of major defense enzymes in response to the elicitors, may bolster eggplants in mounting practical and effective resistance against Ralstonia solanacearum, the devastating wilt pathogen.
7. Results indicate that increased level of ROS production coupled with more efficient antioxidative system, lower rate of lipid peroxidation and high lignin deposition in cell wall may contribute to the resistance of tomato plants to Ralstonia solanacearum.
1. Sudhamoy Mandal, Rupa Kumar Das, Sanjeev Mishra (2011). Differential occurrence of oxidative burst and antioxidative mechanism in compatible and incompatible interactions of tomato and Ralstonia solanacearum. Plant Physiology and Biochemistry;49:117-123.
2. Sudhamoy Mandal (2010). Induction of phenolics, lignin and key defense enzymes in eggplant (Solanum melongena L.) roots in response to elicitors. African Journal of Biotechnology;9: 8038-8047.
3. Arup K. Mukherjee, Shibani Ratha, Sujaya Dhar, Akhil K. Debata, Pradosh K. Acharya, Sudhamoy Mandal, Pratap C. Panda, Ajay K. Mahapatra (2010). Genetic relationships among 22 taxa of bamboo revealed by ISSR and EST-based random primers. Biochemical Genetics; 48:1015-1025.
4. Sudhamoy Mandal, Nirupama Mallick, Adinpunya Mitra (2009). Salicylic acid-induced resistance to Fusarium oxysporum f. sp. lycopersici in tomato. Plant Physiology and Biochemistry;47:642-649.
5. Sudhamoy Mandal, Adinpunya Mitra, Nirupama Mallick (2009). Time course study on accumulation of cell wall-bound phenolics and activities of defense enzymes in tomato roots in relation to Fusarium wilt. World Journal of Microbiology and Biotechnology;25:795-802.
6. Sudhamoy Mandal, Adinpunya Mitra, Nirupama Mallick (2008). Biochemical characterization of oxidative burst during interaction between Solanum lycopersicum and Fusarium oxysporum f. sp. lycopersici. Physiological and Molecular Plant Pathology;72:56-61.
7. Sudhamoy Mandal, Adinpunya Mitra (2008). Accumulation of cell wall-bound phenolic metabolites and their upliftment in hairy root cultures of tomato (Lycopersicon esculentum Mill.). Biotechnology Letters;30:1253-1258.
8. Sudhamoy Mandal, Adinpunya Mitra (2007). Reinforcement of cell wall in roots of Lycopersicon esculentum through induction of phenolic compounds and lignin by elicitors. Physiological and Molecular Plant Pathology;71:201-209.
1. Sudhamoy Mandal, Ramesh C Ray (2011). Induced systemic resistance in biocontrol of plant diseases. In: Singh A, Parmar N, Kuhad RC, eds. Bioaugmentation, Biostimulation and Biocontrol (ISBN: 978-3-642-19768-0). Series: Soil Biology Vol. 28 (1st Edition). Springer, Heidelberg. pp. 241-260.
2. Sudhamoy Mandal, Ramesh C Ray (2010). Reactive Oxygen Species and Antioxidative Mechanisms during Tomato-Pathogen Interactions. In: Aubé ED, Poole FH, eds. Tomatoes: Agricultural Procedures, Pathogen Interactions and Health Effects (ISBN: 978-1-60876-869-1). Series: Agriculture Issues and Policies. Nova Science Publishers, Inc., New York. pp.161-172.
An elicitor, derived from Fusarium oxysporum f. sp. lycopersici, has been found effective in inducing resistance against the tomato wilt pathogen. It has been proved for the first time in India that the hairy roots can be used as a model system for studying plant and root pathogen interactions.