Influence of water stress on intensity of photosynthesis, chlorophyll content and yielding of Dactylis glomerata L. cultivars
Marzena Olszewska
agro@uwm.edu.plKatedra Łąkarstwa, Uniwersytet Warmińsko-Mazurski w Olsztynie (Poland)
Abstract
Two cocksfoot cultivars: Areda and Dala were examined in a greenhouse pot experiment at two soil moisture levels: 40% of field water capacity. During the growing period intensity of photosynthesis was measured with the Li-Cor 6400 device for measuring gas- exchange parameters. Content of chlorophyll was measured with the Minolta chlorophyll meter. Soil moisture had significant influence on intensity of photosynthesis, content of chlorophyll, and in consequence on yielding. Lower moisture of soil caused significant decrease of yield. The tetraploid cultivar Dala yielded significantly higher than the diploid Areda. Content of chlorophyll in leaves also depended on soil moisture, higher values were recorded for plants in conditions of water stress. The photosynthesis proceeded better at higher moisture of soil, water stress caused decrease of photosynthesis, in the cv. Dala by 47%, in the cv. Areda by ca. 42%.
Keywords:
Dactylis glomerata, chlorophyll, photosynthesis, water stressReferences
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Authors
Marzena Olszewskaagro@uwm.edu.pl
Katedra Łąkarstwa, Uniwersytet Warmińsko-Mazurski w Olsztynie Poland
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