Acta Univ. Agric. Silvic. Mendelianae Brun. 2012, 60(3), 69-76 | DOI: 10.11118/actaun201260030069

Effect of drought stress and Glomus inoculation on selected physiological processes of sweet pepper (Capsicum annuum L. cv. 'Slávy')

Aleš Jezdinský1, Jiřina Vojtíšková1, Katalin Slezák2, Kristína Petříková1, Robert Pokluda1
1 Ústav zelinářství a květinářství, Mendelova univerzita v Brně, Valtická 337, 691 44, Lednice, Česká republika
2 Department of Vegetable and Mushroom Growing, Corvinus University of Budapest, Villányi 29-43, Budapest, Hungary

Sweet pepper (Capsicum annuum L. 'Slávy' F1) plants were colonized by the vesicular-arbuscular mycorrhizal fungus Glomus and grown in two irrigational levels: 1. optimal water supply (the irrigation activation by available water capacity (AWC) < 65 %); 2. drought stress (irrigation activation by AWC < 45 %). In the field experiment selected physiological parameters, 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 μmol . m-2 . s-1 2011: 6.1-8.6 μmol . m-2 . s-1). In the next measuring dates, when the temperature decreased and the plants were older stage, the activity of leaves decreased. The inoculation by Glomus species had not clear effect. The inoculation did not increased the activity of plants (photosynthesis, transpiration) under optimal water supply conditions. However, based on results from 2011, under drought stress the inoculation had slightly positive effect on the photosynthetic rate. Under drought stress conditions, the water use efficiency (WUE) of plants increased slightly by the Glomus inoculation (from 4.7 to 5.1 μmol CO2 . mmol H2O-1).

Keywords: Capsicum annuum, photosynthetic rate, transpiration rate, stomatal conductance, water use efficiency (WUE), Glomus
Grants and funding:

This study was supported by National Agency for Agriculture Research, project QH81110.

Received: January 9, 2012; Published: August 28, 2013  Show citation

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Jezdinský, A., Vojtíšková, J., Slezák, K., Petříková, K., & Pokluda, R. (2012). Effect of drought stress and Glomus inoculation on selected physiological processes of sweet pepper (Capsicum annuum L. cv. 'Slávy'). Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 60(3), 69-76. doi: 10.11118/actaun201260030069
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