Abstract
Non-specific Lipid Transfer Proteins were isolated and purified from maize seeds using combinations of ammonium sulphate precipitation and cat-ion exchange chromatography followed by HPLC. Two peptide segments were obtained by MALDI-TOF MS analysis, which were designated as ns-LTP M1 and ns-LTP M2. Both the ns-LTPs were treated to pearl millet seeds at different concentrations for 6 h. Among the concentrations tested, ns-LTP M1 (50 μg/ ml) showed a maximum seed germination of 94% and 1320 seedling vigor followed by ns-LTP M2. The maximum downy mildew disease protection of 62% was offered by ns-LTP M1 (50 μg/ ml) followed by ns-LTP M2 which offered 58% protection. Furthermore, peroxidase (POX) and lipoxigenase (LOX) enzymes related to plant resistance metabolism were also increased considerably after ns-LTP M1 treatment. POX activity was up to two folds when compared to susceptible control seedlings. Thus the present investigation suggests that the maize LTPs could enhance downy mildew disease resistance in pearl millet through the induction of defense mediated enzymes.
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The authors are grateful to the University Grants Commission (UGC) for awarding Major Research Project to corresponding author for financial assistance. Authors are also thankful to Indian Council of Agricultural Research (ICAR), All India Co-ordinated Pearl Millet Improvement Project (AICPMIP), Government of India, Mysore Center, Institution of Excellence (IOE) Project Authorities, University of Mysore, Mysore, India and Department of Botany DST-FIST for research facilities.
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Manjula, S., Murali, M., Shivamurthy, G.R. et al. Non-specific lipid transfer proteins (ns-LTPs) from maize induce resistance in pearl millet against downy mildew disease. Phytoparasitica 43, 437–447 (2015). https://doi.org/10.1007/s12600-014-0446-x
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DOI: https://doi.org/10.1007/s12600-014-0446-x