The impacts of climate modification were examined in terms of changes in the stress tolerance of winter wheat varieties. The enzyme reactions of two winter wheat varieties to drought stress, simulated by water withholding in three different phenophases, were analysed in a phytotron experiment in the Centre for Agricultural Research, Hungarian Academy of Sciences. Plants were raised either at ambient CO2 level or at twice this concentration. The quantities of glutathione reductase (GR), glutathione-S-transferase (GST), catalase (CAT), guaiacol peroxidase (POD) and ascorbate peroxidase (APX) were determined from leaf samples collected at the end of the drought treatment.The results showed that antioxidant enzymes may help to counterbalance the reactive oxygen species induced by stress during various stages of the vegetation period. Although there were substantial differences in the changes induced in the activity of individual enzymes by modifications in environmental factors, this activity and its response to stress depended not only on these factors, but also on the developmental stage of the plant. Modifications in enzyme activity could indicate that enhanced CO2 concentration delayed the development of drought stress up to first node appearance, and stimulated antioxidant enzyme activity when drought occurred during ripening.
Ádám, A., Bestwick, C. S., Barna, B., Mansfield, J. W. (1995): Enzymes regulating the accumulation of active oxygen species during the hypersensitive reaction of bean to Pseudomonas syringae pv. phaseolicola. Planta, 197, 240–249.
Mansfield J. W. , 'Enzymes regulating the accumulation of active oxygen species during the hypersensitive reaction of bean to Pseudomonas syringae pv. phaseolicola ' (1995 ) 197 Planta : 240 -249 .
Ali, M. B., Dewir, Y. H., Hahn, E., Peak, K. (2008): Effect of carbon dioxide on antioxidant enzymes and ginsenoside production in root suspension cultures of Panax ginseng. Environ. Exp. Bot., 63, 297–304.
Peak K. , 'Effect of carbon dioxide on antioxidant enzymes and ginsenoside production in root suspension cultures of Panax ginseng ' (2008 ) 63 Environ. Exp. Bot. : 297 -304 .
Barnabás, B., Jäger, K., Fehér, A. (2008): The effect of drought and heat stress on reproductive processes of cereals. Plant Cell. Environ., 31, 11–38.
Fehér A. , 'The effect of drought and heat stress on reproductive processes of cereals ' (2008 ) 31 Plant Cell. Environ. : 11 -38 .
Bartholy, J., Pongrátz, R. (2007): Regional analysis of extreme temperature and precipitation indices for the Carpathian Basin from 1946 to 2001. Glob. Planet. Change, 57, 83–95.
Pongrátz R. , 'Regional analysis of extreme temperature and precipitation indices for the Carpathian Basin from 1946 to 2001 ' (2007 ) 57 Glob. Planet. Change : 83 -95 .
Bencze, S., Keresztényi, E., Veisz, O. (2007): Change in heat stress resistance in wheat due to soil nitrogen and atmospheric CO2 levels. Cereal Res. Commun., 35, 229–232.
Veisz O. , 'Change in heat stress resistance in wheat due to soil nitrogen and atmospheric CO2 levels ' (2007 ) 35 Cereal Res. Commun. : 229 -232 .
Brázdil, R., Trnka, M., Dobrovolny, P., Chroma, K. (2009): Variability of droughts in the Czech Republic, 1881–2006. Theor. Appl. Climatol.,97, 297–315.
Chroma K. , 'Variability of droughts in the Czech Republic, 1881–2006 ' (2009 ) 97 Theor. Appl. Climatol. : 297 -315 .
D’Souza, S. F., Nathawat, N. S., Nair, J. S., Radha, K. P., Ramaswamy, N. K., Singh, G., Sahu, M. P. (2009): Enhancement of antioxidant enzyme activities and primary photochemical reactions in response to foliar applications of thiols in water-stressed pearl millet. Acta Agron. Hung., 57, 21–31.
Sahu M. P. , 'Enhancement of antioxidant enzyme activities and primary photochemical reactions in response to foliar applications of thiols in water-stressed pearl millet ' (2009 ) 57 Acta Agron. Hung. : 21 -31 .
Farshadfar, E., Farshadfar, M., Sutka, J. (2000): Combining ability analysis of drought tolerance in wheat over different water regimes. Acta Agron. Hung., 48, 353–361.
Sutka J. , 'Combining ability analysis of drought tolerance in wheat over different water regimes ' (2000 ) 48 Acta Agron. Hung. : 353 -361 .
Fernández-Trujillo, J. P., Nock, J. F., Watkins, C. B. (2007): Antioxidant enzyme activities in strawberry fruit exposed to high carbon dioxide atmospheres during cold storage. Food Chem., 104, 1425–1429.
Watkins C. B. , 'Antioxidant enzyme activities in strawberry fruit exposed to high carbon dioxide atmospheres during cold storage ' (2007 ) 104 Food Chem. : 1425 -1429 .
Jaleel, C. A., Riadh, K., Gopi, R., Manivannan, P., Ines, J., Al-Juburi, H. J., Chan-Xiong, Z., Hong-Bo, S., Panneerselvam, R. (2009): Antioxidant defense responses: physiological plasticity in higher plants under abiotic constraints. Acta Physiol. Plant., 31, 427–436.
Panneerselvam R. , 'Antioxidant defense responses: physiological plasticity in higher plants under abiotic constraints ' (2009 ) 31 Acta Physiol. Plant. : 427 -436 .
Janda, T., Kósa, E., Pintér, J., Szalai, G., Marton, C. L., Páldi, E. (2005): Antioxidant activity and chilling tolerance of young maize inbred lines and their hybrids. Cereal Res. Commun., 33, 541–548.
Páldi E. , 'Antioxidant activity and chilling tolerance of young maize inbred lines and their hybrids ' (2005 ) 33 Cereal Res. Commun. : 541 -548 .
Janda, T., Szalai, G., Rios-Gonzalez, K., Veisz, O., Páldi, E. (2003): Comparative study of frost tolerance and antioxidant activity in cereals. Plant Sci., 164, 301–306.
Páldi E. , 'Comparative study of frost tolerance and antioxidant activity in cereals ' (2003 ) 164 Plant Sci. : 301 -306 .
Janda, T., Szalai, G., Tari, I., Páldi, E. (1999): Hydroponic treatment with salicylic acid decreases the effects of chilling injury in maize (Zea mays L.) plants. Planta, 208, 175–180.
Páldi E. , 'Hydroponic treatment with salicylic acid decreases the effects of chilling injury in maize (Zea mays L.) plants ' (1999 ) 208 Planta : 175 -180 .
Khanna-Chopra, R., Selote, D. S. (2007): Acclimation to drought stress generates oxidative stress tolerance in drought-resistant than -susceptible wheat cultivar under field conditons. Environ. Exp. Bot., 60, 276–283.
Selote D. S. , 'Acclimation to drought stress generates oxidative stress tolerance in drought-resistant than -susceptible wheat cultivar under field conditons ' (2007 ) 60 Environ. Exp. Bot. : 276 -283 .
Kocsy, G., Pál, M., Soltész, A., Szalai, G., Boldizsár, Á., Kovács, V., Janda, T. (2011): Low temperature and oxidative stress in cereals. Acta Agron. Hung., 59, 169–189.
Janda T. , 'Low temperature and oxidative stress in cereals ' (2011 ) 59 Acta Agron. Hung. : 169 -189 .
Lascano, H. R., Antonicelli, G. E., Luna, C. M., Melchiorre, M. N., Gomes, L. D., Racca, R. W., Trippi, V. S., Casano, L.M. (2001): Antioxidative system response of different wheat cultivars under drought: field and in vitro studies. Aust. J. Plant. Physiol., 28, 1–9.
Casano L.M. , 'Antioxidative system response of different wheat cultivars under drought: field and in vitro studies ' (2001 ) 28 Aust. J. Plant. Physiol. : 1 -9 .
Láng, L., Kuti, C., Bedő, Z. (2001): Computerised data management system for cereal breeding. Euphytica, 119, 235–240.
Bedő Z. , 'Computerised data management system for cereal breeding ' (2001 ) 119 Euphytica : 235 -240 .
Luo, Q., Bellotti, W., Williams, M., Wang, E. (2009): Adaptation to climate change of wheat growing in South Australia: Analysis of management and breeding strategies. Agric. Ecosyst. Environ., 129, 261–267.
Wang E. , 'Adaptation to climate change of wheat growing in South Australia: Analysis of management and breeding strategies ' (2009 ) 129 Agric. Ecosyst. Environ. : 261 -267 .
Mannervick, B., Guthenberg, C. (1981): Glutathione transferase (Human placenta). Methods in Enzymol.,77, 231–235.
Guthenberg C. , 'Glutathione transferase (Human placenta) ' (1981 ) 77 Methods in Enzymol. : 231 -235 .
Németh, C., Sellyei, B., Veisz, O., Bedó, Z. (2005): Phenological and yield responses of wheat to change in soil moisture in various developmental stages. Cereal Res. Commun., 33, 283–286.
Bedó Z. , 'Phenological and yield responses of wheat to change in soil moisture in various developmental stages ' (2005 ) 33 Cereal Res. Commun. : 283 -286 .
Ortiz, R., Sayre, K. D., Govaerts, B., Gupta, R., Subbarao G. V., Ban, T., Hodson, D., Dixon, J. M., Ortiz-Monasterio, J. I., Reynolds, M. (2008): Climate change: Can wheat beat the heat? Agric. Ecosyst. Environ., 126, 46–58.
Reynolds M. , 'Climate change: Can wheat beat the heat ' (2008 ) 126 Agric. Ecosyst. Environ. : 46 -58 .
Sairam, R. K., Deshmuk, P. S., Saxena, D. C. (1998): Role of antioxidant systems in wheat genotypes tolerance to water stress. Biol. Plant.,41, 387–394.
Saxena D. C. , 'Role of antioxidant systems in wheat genotypes tolerance to water stress ' (1998 ) 41 Biol. Plant. : 387 -394 .
Simova-Stoilova, L., Demirenska, K., Petrova, T., Tsenov, N., Feller, U. (2009): Antioxidative protection and proteolytic activity in tolerant and sensitive wheat (Triticum aestivum L.) varieties subjected to long-term field drought. Plant Growth Regul., 58, 107–117.
Feller U. , 'Antioxidative protection and proteolytic activity in tolerant and sensitive wheat (Triticum aestivum L.) varieties subjected to long-term field drought ' (2009 ) 58 Plant Growth Regul. : 107 -117 .
Smith, L. K., Vierheller, T. L., Thorne, C. A. (1988): Assay of glutathione reductase in crude tissue homogenates using 5,5-dithiobis(2-nitrobenzoic acid). Anal. Biochem.,175, 408–413.
Thorne C. A. , 'Assay of glutathione reductase in crude tissue homogenates using 5,5-dithiobis(2-nitrobenzoic acid) ' (1988 ) 175 Anal. Biochem. : 408 -413 .
Tischner, T., Köszegi, B. Veisz, O (1997): Climatic programmes used in the Martonvásár phytotron most frequently in recent years. Acta Agron. Hung., 45, 85–104.
Veisz O. , 'Climatic programmes used in the Martonvásár phytotron most frequently in recent years ' (1997 ) 45 Acta Agron. Hung. : 85 -104 .
Veisz, O., Bencze, S., Bedö, Z. (2005): Effect of elevated CO2 on wheat and various nutrient supply levels. Cereal Res. Commun., 33, 333–336.
Bedö Z. , 'Effect of elevated CO2 on wheat and various nutrient supply levels ' (2005 ) 33 Cereal Res. Commun. : 333 -336 .
Wang, Z. Y., Li, F. M., Xiong, Y. C., Xu, B. C. (2008): Soil-water threshold range of chemical signals and drought tolerance was mediated by ROS homeostasis in winter wheat during progressive soil drying. J. Plant Growth Regul., 27, 309–319.
Xu B. C. , 'Soil-water threshold range of chemical signals and drought tolerance was mediated by ROS homeostasis in winter wheat during progressive soil drying ' (2008 ) 27 J. Plant Growth Regul. : 309 -319 .
Xiong, W., Holman, I., Lin, E., Conway, D., Jiang, J., Xu, Y., Li, Y. (2010): Climate change, water availability and future cereal production in China. Agric. Ecosyst. Environ.,135, 58–69.
Li Y. , 'Climate change, water availability and future cereal production in China ' (2010 ) 135 Agric. Ecosyst. Environ. : 58 -69 .