Ecophysiological conditions of germination of barnyard grass [Echinochloa crus-galli (L.) P. Beauv.] diaspores
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University of Warmia and Mazur, Department of Botany and Nature Protection Plac Łódzki 1, 10-718 Olsztyn, Poland
University of Warmia and Mazur, Department of Plant Physiology and Biotechnology Oczapowskiego 1a, 10-718 Olsztyn, Poland
Magdalena Kucewicz
University of Warmia and Mazur, Department of Botany and Nature Protection Plac Łódzki 1, 10-718 Olsztyn, Poland
Journal of Plant Protection Research 2006;46(1):73–84
The aim of the study was to investigate the effect of some different environmental conditions prevailing during the development and ripening of Echinochloa crus-galli diaspores on their germination. Some seeds were tested in the autumn the same year, whereas others were divided into two groups: dispersed seedsand seeds within the inflorescence. Then the seeds of both groups were buried. After eight-month stratification in the soil, the diaspores were tested under the same conditions as the samples examined in the autumn. The seeds tested in the spring germinated faster than those tested in the autumn. Also the germination capacity of barnyard grass caryopses examined in the summer was almost twofold higher than the germination capacity of those examined in the autumn. Both autumn and spring tests revealed that the harvest time affected germination. The seeds obtained in the second half of August and at the beginning of September (in the middle of the growing season) were characterized by a higher germination capacity than the caryopses collected at the beginning and the end of the reproduction period. The results show that the germination capacity and rate were not influenced by the place of origin, habitat conditions and accompanying plants. It was found in spring tests that germination depended on the kind of dissemination unit stored in the soil. After eight-month soil stratification, dispersed caryopses germinated by approx. 20% better than those stored with a part of the inflorescence.
The authors have declared that no conflict of interests exist.
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