Abstract
Plants react to pathogen attack through a variety of active and passive defense mechanisms primarily related to the metabolism of phenolic compounds and oxidative metabolism. Thus the activation of defensive reactions is associated with the increased expression of a great number of genes that encode enzymes involved in the biosynthetic pathway of phenolic compounds. Similarly, the activation of oxidative metabolism precedes the expression of defense genes during plant-pathogen interactions, so both metabolic processes must exert a major function in directing the mechanisms to resist disease. Similarly, it has been suggested that certain fungicides used to mitigate or prevent pathogen attack may be involved in activating certain defensive responses of plants. However, the fact that such substances may influence the key steps of the phenolic and oxidative processes has scarcely been studied. Our work confirms the results proposed by other authors, who suggest that certain wide-spectrum fungicides, in addition to their antibiotic action against pathogens, may be involved in the activation of some defensive responses of plants.
Similar content being viewed by others
Literature Cited
Aono, M., H. Saji, A. Sakamoto, K. Fujiyama, N. Cómodo &K. Tanaka. 1995. Paraquat tolerance of transgenicNicotiana tabaccum with enhanced activities of glutathione reductase and Superoxide dismutase. Pl. Cell Physiol. 36: 1687–1691.
Apostol, I., P. F. Heinstein &P. S. Low. 1989. Rapid simulation of an oxidative burst during elicitation of cultured plant cells: Role in the defense and signal transduction. Pl. Physiol. (Lancaster) 90: 109–116.
Bader, K. P. &R. Abdel-Basset. 1999. Adaptation of plants to anthropogenic and environmental stresses: The effects of air constituents and plant-protective chemicals. Pp. 973–1010in M. Pessarakli (ed.), Handbook of plant and crop stress. Marcel Dekker, New York.
Barak, E., L. V. Edginton &B. D. Ripley. 1984. Bioactivity of the fungicide metalaxyl in potato tubers against some species ofPhytophthora, Fusarium, andAlternaria, related to polyohenoloxidase activity. Canad. J. Pl. Pathol. 6: 304–308.
Benhamou, N. 1996. Elicitor-induced plant defence pathways. Trends Pl. Sci. 1: 233–240.
Bowler, C., M. V. Van Montagu &D. Inzé. 1992. Superoxide dismutase and stress tolerance. Annual Rev. Pl. Physiol. Pl. Molec. Biol. 43: 83–116.
Bradley, D. J., P. Kjellbom &C. J. Lamb. 1992. Elicitor-induced and wound-induced oxidative crosslinking of a proline-rich plant-cell wall protein: A novel, a rapid defense response. Cell 70: 21–30.
Brisson, L. F., R. Tenhaken &C. Lamb. 1994. Function of oxidative cross-linking of cell wall structural proteins in plant disease resistance. Pl. Cell 6: 1703–1712.
Cadenas, E. 1989. Biochemistry of oxygen toxicity. Annual Rev. Biochem. 58: 79–110.
Cakmak, I. &H. Marschner. 1993. Activities of hydrogen peroxide-scavenging enzymes in germinating wheat seed. J. Exp. Bot. 44: 127–132.
Chen, Z., H. Silva &D. F. Klessig. 1993. Active oxygen species in the induction of plant systematic acquired resistance by salicylic acid. Science 262: 1883.
Chester, K. S. 1933. The problem of acquired physiological immunity in plants. Quart. Rev. Biol. 8: 275–324.
Delaney, T. P., S. Uknes, B. Vernoij, L. Friedrich, K. Weymann, D. Negrotto, T. Gaffney, M. Gut-Rella, H. Kessmann &E. Ward. 1994. A central role of salicylic acid in plant disease resistance. Science 266: 1247–1250.
Delp, C. J. 1987. Benzimidazole and related fungicides. Pp. 233–244in H. Lyr (ed.), Modern selective fungicides: Properties, applications, mechanisms of action. Wiley, New York.
Dixon, R. A. &C. J. Lamb. 1990. Molecular communication in interactions between plant and microbial pathogens. Annual Rev. Pl. Physiol. Pl. Molec. Biol. 41: 339–367.
—,M. J. Harrison &C. J. Lamb. 1994. Early events in the activation of plant defense responses. Annual Rev. Phytopathol. 32: 479–501.
Doke, N. 1983. Generation of Superoxide anion by potato tuber protoplast during hypersensitive response to hyphal wall components ofPhytophtora infestons and specific inhibition of the reaction with suppressors of hypersensitivity. Physiol. Pl. Pathol. 23: 359–367.
— &Y. Ohashi. 1988. Involvement of an O2 generating system in the induction of necrotic lesions on tobacco leaves infected with tobacco mosaic virus. Physiol. Molec. Pl. Pathol. 32: 163–175.
Dominguez, F. 1998. Plagas y enfermedades de las plantas cultivadas. Ed. 9. Mundi-Prensa Libros, Madrid.
Durner, J. &D. F. Klessig. 1995. Inhibition of ascorbate peroxidase by salicylic acid and 2,6-dichloroisonicotinic acid, two inducers of plant defence responses. Proc. Natl. Acad. U.S.A. 92: 11312–11316.
Ebel, J. &H. Grisebach. 1988. Defense strategies of soybean against the fungusPhytophthora megasperma f. sp.glycinea: A molecular analysis. Trends Biochem. Sci. 13: 23–27.
Enyedi, A., N. Yalpani, P. Silverman &I. Raskin. 1992. Localization, conjugation and function of salicylic acid in tobacco during the hypersensitive reaction to tobacco mosaic virus. Proc. Natl. Acad. U.S.A. 89: 2480–2484.
Fisher, D. J. &A. L. Hayes. 1982. Mode of action of the systemic fungicides furalaxyl, metalaxyl, and ofurace. Pest. Sci. 13: 330–339.
Friend, J. 1985. Phenolic substances and plant disease. Pp. 131–137in C. F. van Sumere & P. J. Lea (eds.), The biochemistry of plant phenolics. Clarendon, Oxford.
Garcia, P. C., R. M. Rivero, L. R. López-Lefebre, E. Sánchez, J. M. Ruiz &L. Romero. 2001. Direct action of the biocide carbendazim on phenolic metabolism in tobacco plants. J. Agric. Food Chem. 49: 131–137.
—. 2002. Is the application of carbendazim harmful to healthy plants? Evidence of weak phytotoxicity in tobacco. J. Agric. Food Chem. 50: 279–283.
Guest, D. I. 1984. Modification of defence responses in tobacco and capsicum following treatments with fosetyl-Al [aluminium tris (o-ethyl phosphonate)]. Physiol. Pl. Pathol. 25: 125–134.
Hammond-Kosack, K. E. &J. G. Jones. 1996. Resistance gene-dependent plant defense responses. Pl. Cell 8: 1773–1791.
Hernández, J. A., E. Olmos, F. G. Corpas, F. Sevilla &L. A. del Rio. 1995. Salt-induced oxidative stress on chloroplasts of pea plants. Pl. Sci. (Elsevier) 105: 151–167.
Heydari, A. &I. J. Misaghi. 1999. Herbicide-mediated changes in the population and activity of root-associated microorganisms: A potential cause of plant stress. Pp. 613–624in M. Pessarakli (ed.), Handbook of plant and crop stress. Marcel Dekker, New York.
Hunt, M. D. &J. A. Ryals. 1996. Systemic acquires resistance signal transduction. Critical Rev. Pl. Sci. 15(5–6): 583–606.
Iturbe-Omaerxe, I., J. F. Moran, C. Arrese-Igor, Y. Gorgocena, R. V. Klucas &M. Becana. 1995. Activated oxygen and antioxidant defenses in iron-deficient pea plants. Pl. Cell Environ. 18: 421–429.
Jones, J. B., S. S. Woltz, J. P. Jones &K. L. Portier. 1991. Population dynamics ofXanthomonas campestris pv. Vesicatoria on tomato leaflets treated with copper bactericides. Phytopathology 81: 714–719.
Keppler, L. D., C. J. Baker &M. M. Atkinson. 1989. Active oxygen production during a bacteria induced hypersensitive reaction in tobacco suspension cells. Phytopathology 79: 974–978.
Klessig, D. F. &J. Malamy. 1994. The salicylic acid signal in plants. Pl. Molec. Biol. 26: 1439–1458.
Kuc, J. 1995. Phytoalexins, stress metabolism, and disease resistance in plants. Annual Rev. Phytopathol. 33: 275–297.
Leon, J., M. A. Lawton &I. Raskin. 1995. H2O2 simulated salicylic acid biosynthesis in tobacco. Pl. Physiol. (Lancaster) 108: 1673–1678.
Levine, A., R. Tenhaken, R. Dicon &C. Lamb. 1994. H2O2 from the oxidative burst orchestrates the plant hypersensitive disease resistance response. Cell 79(4): 583–593.
Lydon, J. &S. O. Duke. 1989. Pesticide effects on secondary metabolism of higher plants. Pest. Sci. 25: 361–373.
Malamy, J., J. P. Carr, D. F. Klessig &I. Raskin. 1990. Salicylic acid: A likely endogenous signal in the resistance response of tobacco to viral infection. Science 205: 1002–1004.
Marc, W., V. Iersel &B. Bugbee. 1996. Phytotoxic effects of benzimidazole fungicides on bedding plants. J. Amer. Soc. Hort. Sci. 211(6): 1095–1102.
———. 1997. Dibutylurea reduces photosynthesis, growth and flowering ofPetunia andImpatiens. J. Amer. Soc. Hort. Sci. 122(4): 536–541.
Mauch-Mani, B. &A. J. Slusarenko. 1996. Production of salicylic acid precursors is a major function of phenylalanine ammonia-lyase in the resistance ofArabidopsis toPeronospora parasitica. Pl. Cell. 8: 203–212.
Mehdy, M. C., Y. K. Sharma &K. Sathasivan. 1996. The role of activated oxygen species in plant disease resistance. Physiol. PL (Copenhagen) 98(2): 365–374.
Métraux, J., H. Singer, J. Ryals, E. Ward, M. Wyss-Benz, J. Gaudin, K. Raschdorf, E. Schmid, W. Blum &B. Inverardi. 1990. Increase in salicylic acid at the onset of systemic acquired resistance in cucumber. Science 250: 1004–1006.
Mishra, N. P., R. K. Mishra &G S. Singhal. 1995. Changes in the activities of antioxidant enzymes during exposure of intact wheat leaves to strong visible light at different temperatures in presence of protein synthesis inhibitors. PL Physiol. (Lancaster) 102: 903–910.
Molina, A., M. D. Hunt &J. A. Ryals. 1998. Impaired fungicide activity in plants blocked in disease resistance signal transduction. PL Cell 10: 1903–1914.
Monk, L. S., K. V. Fagerstedt &R. M. N. Crawford. 1987. Superoxide dismutase as an anaerobic polypeptide: A key factor in recovery from oxygen deprivation inIris pseudacorus? Plant. Physiol. 85: 1016–1020.
Nagarathna, K. C., S. A. Shetty &H. S. Shetty. 1993. Phenylalanine ammonia-lyase activity in pearl millet seedlings and its relation to downy mildew disease resistance. J. Exp. Bot. 44: 1291–1296.
Nemestothy, G N. &D. I. Guest. 1990. Phytoalexin accumulation, phenylalanine ammonia-lyase activity and ethylene biosynthesis in fosetyl-Al treated resistant and susceptible tobacco cultivars infected withPhytophthora nicotianae var.nicotiane. Physiol. Molec. Pl. Pathol. 37: 207–219.
Nicholson, R. L. &R. Hammerschmidt. 1992. Phenolic compounds and their role in disease resistance. Annual Rev. Phytopathol. 30: 369–389.
Olsson, M., K. Nilsson, C. Liljenberg &G A. F. Hendry. 1996. Drought stress in seedlings-lipid metabolism and lipid peroxidation during recovery from drought inLotus corniculatus andCerastium fontanum. Physiol. Pl. (Copenhagen) 96: 577–584.
Pallas, J. A., N. L. Pavia, C. Lamb &R. A. Dixon. 1996. Tobacco plants epigenetically suppressed in phenylalanine ammonia-lyase expression do not develop systemic acquired resistance in response to infection by tobacco mosaic virus. Pl. J. 10: 281–293.
Peng, M. &J. Kuc. 1992. Peroxidase-generated hydrogen peroxide as a source of antifungal activity in vitro on tobacco leaf disks. Phytopathology 82: 696–699.
Rainieri, A., G D’Urso, C. Nali, G Lorenzoni &G F. Soldatini. 1996. Ozone stimulates apoplastic antioxidant system in pumpkin leaves. Physiol. Pl. (Copenhagen) 97: 381–387.
Rasmussen, J. B., R. Hammerschmidt &M. N. Zook. 1991. Systemic induction of salicylic acid accumulation in cucumber after inoculation withPseudomonas syringae pv.Syringae. PI. Physiol. (Lancaster) 97: 1342–1347.
Ryals, J. K., U. H. Neuenschwander, M. G. Willits, A. Molina, H. Steiner &M. D. Hunt. 1996. Systemic acquired resistance. Pl. Cell 8: 1809–1819.
Skene, K. G M. 1972. Cytokinin-like properties of the systemic fungicide benomyl. J. Hort. Sci. 47: 179–182.
Smith-Becker, J., E. Marois, E. J. Huguet, S. L. Midland, J. J. Sims &N. T. Keen. 1998. Accumulation of salicylic acid and 4-hydrobenzoic acid in phloem fluids of cucumber during systemic resistance is preceded by a transient increase in phenylalanine ammonia-lyase activity in petioles and stem. Pl. Physiol. (Lancaster) 116: 231–238.
Summermatter, K., L. Sticher &J. P. Métraux. 1995. Systemic response inArabidopsis thaliana infected and challenged withPseudomonas syringae pv.syringae. Pl. Physiol. (Lancaster) 108: 1379–1385.
Tenhaken, R., A. Levine, L. F. Brisson, R. A. Dixon &C. J. Lamb. 1995. Function of the oxidative burst in hypersensitive disease resistance. Proc. Natl. Acad. U.S.A. 92: 4158–4163.
Tiburzy, R. &H. J. Reisener. 1990. Resistance of wheat toPuccinia graminis f. sp.Tritici: Association of the hypersensitive reaction with the cellular accumulation of linkin-like material and callose. Physiol. Molec. Pl. Pathol. 36: 109–120.
Tomlin, C. (ed.). 1994. The pesticide manual: A world compendium: Incorporating the agrochemicals handbook. Ed. 10. British Crop Protection Council, Farnham, England; Royal Society of Chemistry, Information Sciences, Cambridge.
Tripathi, R. K., K. Tandon, E. Schlösser &W. M. Hess. 1982. Effects of fungicides on the physiology of plants, IV: Protection of cellular organelles of senescent wheat leaves by carbendazim. Pest. Sci. 13: 395–400.
Uknes, S., B. Mauch-Many, M. Moyer, S. Potter, S. Williams, S. Dincher, D. Chandler, A. Slusarenko, E. Ward. &J. Ryals. 1992. Acquired resistance inArabidopsis. Pl. Cell. 4: 645–656.
Vera-Estrella, R., E. Blumwald &V. J. Higgins. 1992. Effect of specific elicitors ofCladosporium fulvum on tomato suspension cells. Pl. Physiol. (Lancaster) 99: 1208–1215.
Ward, E. R., S. J. Uknes, S. C. Williams, S. S. Dincher, D. L. Wiederhold, D. C. Alexander, P. Ahl-Goy, J. Métraux &J. A. Ryals. 1991. Coordinate gene activity in response to agents that induce systemic acquired resistance. Pl. Cell. 3: 1085–1094.
Ward, E. W. B., G Lazarovits, P. Stössel, S. D. Barrie &C. H. Unwin. 1980. Glyceollin production associated with the control ofPhytophthora root of soybean by the systemic fungicide, metalaxyl. Phytopathology 70: 738–740.
Weckx, J. E. J. &H. M. M. Clijters. 1996. Oxidative damage and defense mechanisms in primary leaves ofPhaseolus vulgaris as a result of root assimilation of toxic amounts of copper. Physiol. Pl. (Copenhagen) 96: 506–512.
Wendehenne, D., J. Durner, Z. Chen &D. F. Klessig. 1998. Bezothiadiazole, an inducer of plant defenses, inhibits catralase and ascorbate peroxidase. Phytochemistry 47: 651–657.
Wenzel, A. A. &H. Melhorn. 1995. Zinc deficiency enhances ozone toxicity in bush beans (Phaseolus vulgaris L. cv.Saxa). J. Exp. Bot. 46: 867–872.
Wojtaszek, P. 1995. Oxidative burst: An early plant response to pathogen infection. Biochem. J. 332: 681–692.
Wu, G., B. J. Shortt, E. B. Lawrence, J. Leon, K. C. Fitzsimmons, E. B. Levine, I. Raskin &D. M. Sha. 1997. Activation of host defense mechanisms by elevated production of H2O2 in transgenic plants. Pl. Physiol. (Lancaster) 115: 427–435.
Yuste, M. P. &J. Gostincar. 1999. Handbook of agriculture. Marcel Dekker, New York.
Zacheo, G. &T. Bleve-Zacheo. 1988. Involvement of Superoxide dismutases and Superoxide radicals in the susceptibility and resistance of tomato plants toMeloidogyne incognita attack. Physiol. & Molec. Pl. Pathol. 32: 313–322.
—. 1983. Mitochondrial peroxidase and Superoxide dismutase activities during the infection byMeloidogyne incognita of susceptible and resistant tomato plants. Nematol. Medit. 11: 107–114.
Zhang, J. &M. B. Kirkham. 1995. Enzymatic responses of the ascorbate-glutathione cycle to drought in the sorghum and sunflower plants. Pl. Sci. 113: 139–147.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Garcia, P.C., Rivero, R.M., Ruiz, J.M. et al. The role of fungicides in the physiology of higher plants: Implications for defense responses. Bot. Rev 69, 162–172 (2003). https://doi.org/10.1663/0006-8101(2003)069[0162:TROFIT]2.0.CO;2
Issue Date:
DOI: https://doi.org/10.1663/0006-8101(2003)069[0162:TROFIT]2.0.CO;2