Chitosan in the induction of resistance to the damping off tomato seedlings caused by Rhizoctonia solani Kuhn

Authors

  • Rita de Cassia Dosciatti Serrão Rocha
  • Sérgio Miguel Mazaro
  • Jean Carlo Possenti
  • Álvaro Rodrigo Freddo
  • Ivan Carlos Zorzzi
  • Nean Locatelli Dallacosta
Supporting Agencies

Keywords:

fitopatologia, proteínas relacionadas à patogênese (PRP’s), Solanum lycopersicum L.

Abstract

The objective of this study was to evaluate the potential of chitosan in the damping off tomato resistance induction caused by Rhizoctonia solani. The tomato seeds were submerged in solution with chitosan for twenty minutes in concentrations of 0.25; 0.5; 1 and 2% and in the control (distilled water only). The seeds were sown in polystyrene trays containing substrate inoculated with R. solani and kept in a growth chamber with 12 hours photoperiod and temperature of 25 ºC ± 2 °C for 14 days. After this period we evaluated the survival of seedlings, length and fresh weight and activity of the enzyme phenylalanine ammonia lyase (PAL), chitinase and β-1,3-glucanase. The results showed that chitosan when applied to the treatment of tomato seeds at a concentration of 0.30%, favoring the survival of seedlings inoculated with the pathogen substrate. This result is mainly related to the activation of resistance mechanisms in the plant, evidenced by activation of FAL enzymes, chitinase and β-1,3-glucanases.

Published

20-12-2017

How to Cite

ROCHA, R. de C. D. S.; MAZARO, S. M.; POSSENTI, J. C.; FREDDO, Álvaro R.; ZORZZI, I. C.; DALLACOSTA, N. L. Chitosan in the induction of resistance to the damping off tomato seedlings caused by Rhizoctonia solani Kuhn. Scientia Agraria Paranaensis, [S. l.], v. 16, n. 4, p. 430–435, 2017. Disponível em: https://e-revista.unioeste.br/index.php/scientiaagraria/article/view/15038. Acesso em: 29 may. 2025.

Issue

Section

Scientific Article