Effect of drought stress and Glomus inoculation on selected physiological processes of sweet pepper (Capsicum annuum L. cv. 'Slavy')
2012
Jezdinsky, A., Mendelova Univ., Brno (Czech Republic). Ustav Zelinarstvi a Kvetinarstvi | Vojtiskova, J., Mendelova Univ., Brno (Czech Republic). Ustav Zelinarstvi a Kvetinarstvi | Slezak, K., Corvinus Univ. of Budapest (Hungary). Dept. of Vegetable and Mushroom Growing | Petrikova, K., Mendelova Univ., Brno (Czech Republic). Ustav Zelinarstvi a Kvetinarstvi | Pokluda, R., Mendelova Univ., Brno (Czech Republic). Ustav Zelinarstvi a Kvetinarstvi
Sweet pepper (Capsicum annuum 'Slavy' F1) plants were colonized by the vesicular-arbuscular mycorrhizal fungus Glomus and grown in two irrigational levels in a field experiment as follows: 1. optimal water supply (the irrigation activation by available water capacity (AWC) less than 65 %); 2. drought stress (irrigation activation by AWC less than 45 %). Selected physiological characteristics, such as photosynthetic rate, transpiration rate, stomatal conductance and water use efficiency were observed. The highest photosynthetic activity was observed in the first measuring date in both experimental years (2010: 7.5-8.1 micromol/square m/s and 2011: 6.1-8.6 micromol/square m/s). In the next measuring dates, when the temperature decreased and the plants were older, the activity of leaves decreased. The inoculation by Glomus species had not any clear effect. The inoculation did not increase the activity of plants (photosynthesis, transpiration) under optimal water supply conditions. However, based on results from 2011, the inoculation had a slightly positive effect on the photosynthetic rate in plants under drought stress. The water use efficiency of inoculated plants under drought stress increased slightly (from 4.7 to 5.1 micromol CO2/mmol H2O).
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