Induction of Resistance in Tomato Plants against Fusarium Crown and Root Rot Disease by Trichoderma harzianum and Chitosan
Abu Taleb, A., Tharwat, N., El-Mohamedy, R. (2013). Induction of Resistance in Tomato Plants against Fusarium Crown and Root Rot Disease by Trichoderma harzianum and Chitosan. EKB Journal Management System, 41(1), 13-26. doi: 10.21608/ejp.2013.101965
Amira Abu Taleb; Nagwa Tharwat; Riad El-Mohamedy. "Induction of Resistance in Tomato Plants against Fusarium Crown and Root Rot Disease by Trichoderma harzianum and Chitosan". EKB Journal Management System, 41, 1, 2013, 13-26. doi: 10.21608/ejp.2013.101965
Abu Taleb, A., Tharwat, N., El-Mohamedy, R. (2013). 'Induction of Resistance in Tomato Plants against Fusarium Crown and Root Rot Disease by Trichoderma harzianum and Chitosan', EKB Journal Management System, 41(1), pp. 13-26. doi: 10.21608/ejp.2013.101965
Abu Taleb, A., Tharwat, N., El-Mohamedy, R. Induction of Resistance in Tomato Plants against Fusarium Crown and Root Rot Disease by Trichoderma harzianum and Chitosan. EKB Journal Management System, 2013; 41(1): 13-26. doi: 10.21608/ejp.2013.101965

Induction of Resistance in Tomato Plants against Fusarium Crown and Root Rot Disease by Trichoderma harzianum and Chitosan

Egyptian Journal of Phytopathology
Article 2, Volume 41, Issue 1, June 2013, Page 13-26  XML PDF (167.52 K)
Document Type: Original Article
DOI: 10.21608/ejp.2013.101965
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Authors
Amira Abu Taleb* 1; Nagwa Tharwat1; Riad El-Mohamedy2
1Botany Dept., Fac. of Sci., Cairo Univ., Giza, Egypt
2Plant Pathol. Dept., Nat. Res. Centre, Giza, Egypt
Abstract
Phenolic compounds in addition to activity of polyphenol oxidase (PPO) and peroxidase (POD) were significantly increased in tomato plants in response to Fusarium oxysporum f.sp. radicislycopersici (FORL) infection, whereas chitinase and β-1,3 glucanase activities were significantly inhibited when compared with the healthy plant. Trichoderma harzianum and chitosan reflected many components of defence signals which leading to the activation of power defence system in tomato against pathogen attack. The reduction in disease incidence and severity was accompanied with remarkable increases in phenolic content and activity of polyphenol oxidase, peroxidase and glucanase in infected plant treated with T. harzianum and chitosan. On the other hand, chitinase activity showed insignificant increase under the application of T. harzianum and chitosan when compared with the infected untreated control. T. harzianum and chitosan treatment as root dipping in combination with chitosan foliar spray was the most effective treatment against Fusarium crown and root rot disease (FCRR) incidence and severity, through induction of physiological host defence mechanisms. Induction of systemic resistance against FORL is one of the main mechanisms by which T. harzianum and chitosan contribute to tomato plants protection.
Keywords
Chitosan; crown; root-rot; induced resistance; Fusarium; T. harzianum and tomato
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