Assessment of Defence Enzymes in Determining Resistance in Tomato and Chilli against Root-Knot Nematode, Meloidogyne incognita

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dc.contributor.advisorSiddiqui, A. U.
dc.contributor.authorChandrawat, B. Singh
dc.date.accessioned2017-11-02T11:12:10Z
dc.date.available2017-11-02T11:12:10Z
dc.date.issued2017
dc.descriptionAssessment of Defence Enzymes in Determining Resistance in Tomato and Chilli against Root-Knot Nematode, Meloidogyne incognitaen_US
dc.description.abstractTomato (Lycopersicon esculentum Mill) and chilli (Capsicum frutescens L.) are one of the important vegetable crops grown in India. Root-knot nematode, Meloidogyne incognita is widely distributed the country and cause economic losses to both of these crops. Various nematicides which have so far been used to control root-knot nematode which are not only expensive and cumbersome to apply, but are also hazardous to human beings and the environment. In order to reduce dependence on nematicides, alternative methods which are eco-friendly and feasible to adopt by the growers have been tried. The use of nematode resistant varieties seems to be one of the feasible options for nematode management. Enzymes such as PO, PAL, PPO, SOD and CAT are reported to be involved in the mechanism of disease resistance. In view of the economic importance of root-knot nematodes in vegetables in the agriculture scenario, the present investigations were undertaken with the objective to assess the induced systemic resistance in resistant and susceptible varieties of tomato and chilli against M. incognita and in a susceptible variety with the application of bio-agents and oil-cakes in soil. The enzyme (PO, PPO, PAL and SOD) activity was analyzed in resistant variety of tomato (Hisar lalit and S-120) & chilli (Pusa jwala and NP 46-A) and susceptible variety of tomato (Navodya and Damini) & chilli (S-5 and Ghoomar). The roots from inoculated and un-inoculated plants were evaluated after 7, 14, 21, 28 and 60 days after transplanting. Enzyme activity was observed maximum in resistant as compared to susceptible varieties which was increased after root-knot nematode infection. The highest activity of enzymes was found between 21 and 28 day after transplanting. Among all the treatments, resistant varieties of tomato and chilli were found to be the best treatments in highest enzyme activities, improving plant growth character and reducing nematode population over other treatment. The soil application (@ 2g and 4g per kg soil) of bio-agents viz. T. viride, T. harzianum, P. chlamydosporia and P. lilacinus increased the level of PO, PPO, PAL and SOD in both tomato as well as chilli roots. T. viride @ 4g/kg soil was found best treatment in the accumulation of defence enzymes, improved plant growth characters and reduced nematode reproduction in both the crops. The enzyme activity showed gradual increase from 7 DAI onwards to 28 DAI in plant roots treated with bioagents as compared to untreated ones. Significant effects were also observed with soil application (@ 2.5 and 5.0 q/ha) of oil-cakes viz. castor, mahua, karanj and mustard increased the level of PO, PPO, PAL and SOD in tomato and chilli roots. Mustard cake @ 5.0 q/ha was found the best treatments to improve plant growth characters and reduced nematode reproduction in both the crops. Among enzymes the PO was found highest in tomato and chilli roots at different data recording intervals followed by SOD, while PPO and PAL were observed in low quantity.en_US
dc.identifier.citationChandrawat and Siddiqui, 2017en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810034608
dc.keywordsEnzymes, Determining, Resistance, Tomato, Chilli, Meloidogyne incognitaen_US
dc.language.isoenen_US
dc.pages138en_US
dc.publisherMPUAT, Udaipuren_US
dc.research.problemAssessment of Defence Enzymes in Determining Resistance in Tomato and Chilli against Root-Knot Nematode, Meloidogyne incognitaen_US
dc.subNematologyen_US
dc.subjectnullen_US
dc.themeAssessment of Defence Enzymes in Determining Resistance in Tomato and Chilli against Root-Knot Nematode, Meloidogyne incognitaen_US
dc.these.typePh.Den_US
dc.titleAssessment of Defence Enzymes in Determining Resistance in Tomato and Chilli against Root-Knot Nematode, Meloidogyne incognitaen_US
dc.typeThesisen_US
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