Journal of Biological Sciences1727-30481812-5719Asian Network for Scientific Information10.3923/jbs.2008.1039.1044EsmailzadehM. SoleimaniM.J. RouhaniH. 6200886Tomato stem canker caused by Alternaria alternata
f. sp. lycopersici, is one of the most devastating diseases
worldwide. In this study, possible effect of using Salicylic Acid (SA)
in host resistance induction against tomato stem canker was investigated.
Foliar applications of salicylic acid with two concentrations of 200 and
400 μM were tested against fungal pathogen. The results demonstrated
that use of 200 μM dosage of SA was insufficient for inducing disease
resistance. However, applications of SA in concentration 400 μM significantly
reduced disease index as compared with infected control. There were significant
effects of plant cell reactions in terms of percentage of penetration
events that occurred at the site of attempted penetration. SA pre-treated
plants were identified with higher numbers of single cell necrosis (hypersensitive
response), but lower blighted areas and discolorations, as compared with
non treated plant (control). The results obtained from high performance
thin layer chromatography (HPTLC) analysis indicated that there is highly
correlation between increasing of the endogenous levels of free SA in
treated plants and reduction of the blighted leaf areas. SA pre-treatment
plants caused an increase in the endogenous free SA levels in tomato leaves
which resulted in systemic resistance induction.]]>Arie, T., H. Takahshi, M. Kodama and T. Teraoka,200724135147Asselbergh, B. and M. Hofte,2007Botrytis cinerea include abscisic acid-dependent callose formation.]]>713340Coquoz, J.L., A.J. Buchala, P. Meuwly and J.P. Metraux,1995Phytophthora infestans and Alternaria solani.]]>8512191224Durrant, W.E. and X. Dong,200442185209Gaffney, T., L. Friedrich, B. Vernooj, D. Negrotto and G. Nye et al.,1993261754756Gozzo, F.,20035144874503Grant, M. and J. Mansfield,19992312319Kessmann, H., T. Staub, C. Hofmann, T. Maetzke and J. Herzog et al.,199432439459Krzek, J. and M. Starek,19995356360Lawton, K.A., L. Friedrich, M., Hunt, K. Weymann and T. Delaney et al.,1996Arabidiopsis by activation of the systemic acquired resistance signal transduction pathway.]]>107182McRoberts, N. and J.H. Lennard,1996Alternaria species and leaves of host and nonhost plants.]]>45742752Malamy, J., J.P. Carr, D.F. Kessig and I. Raskin,199025010021004Ryals, J., S. Uknes and E. Ward,199410411091112Spletzer, M.E. and A.J. Enyedi,1999Alternaria solani in hyroponically grown tomato.]]>89722727Thomma, B.P.H.J.,2003Alternaria spp.: From general saprophyte to specific parasite.]]>4225236Thomma, B.P.H.J., K. Eggermont, I.A.M.A. Penninckx, B. Mauch-Mani, R. Vogelsang, B.P.A. Cammue and W.F. Broekaert,1998Arabidiopsis are essential for resistance to distinct microbial pathogens.]]>951510715111Thomma, B.P.H.J., I.A.M.A. Penninckx, W.F. Broekaert and B.P.A. Cammue,2001136368Vallad, G.E. and R.M. Goodman,20044419201934Vernooij, B., L. Friedrich, A. Morse, R. Reist and R. Kolditz-Jawhar et al.,19946959965Weete, J.D.,1992Alternaria cassiae in sicklepod.]]>40437445White, R.F.,197999410412Yalpani, N., P. Silverman, T.M.A. Wilson, D.A. Kleier and L. Raskin,19913809818Yildiz, L. and A. Guven,2007Vitis plants by Uncinula necator.]]>39183191