Influence of nutrition and ph on growth and sclerotia formation of Sclerotinia sclerotiorum (Lib.) de bary from Gaillardia pulchella foug |
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Authors: | R. A. Rai J. P. Agnihotri |
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Affiliation: | (1) Division of Plant Pathology, Agricultural Experiment Station, University of Udaipur, Campus Jobner, Jaipur, India |
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Abstract: | Sclerotinia sclerotiorum causing foot rot ofGaillardia pulchella was found to grow well on semi-synthetic media. Amongst synthetic media, Richard's medium and Czapek's medium supported good growth and sclerotial formation. Glucose among monosaccharides and maltose followed by sucrose, among disaccharides, were good sources of carbon for the growth of the fungus. Glycerol and mannitol were observed to be poor sources. Best sclerotial production was favoured by glucose. Ammonium sulphate was utilized well followed by potassium and sodium nitrates. Ammonium phosphate favoured best sclerotial formation. The pathogen could tolerate a wide range of pH, but good growth and sclerotial formation were favoured at pH varying from 4 to 5.5.
Zusammenfassung Sclerotinia sclerotiorum, die Ursache der Fäulnis vonGaillardia pulchella, wächst gut an semisynthetischen Nährböden. Unter den synthetischen Nährböden, diejenigen von Richard und von Czapek, unterstützten gutes Wachstum und Bildung von Sclerotien. Unter den Monosacchariden Glukose, unter den Disacchariden Maltose und Sukrose waren gute Quellen für Kohlenstoff für Pilzwachstum. Glycerol und Mannitol ergaben geringeren Ertrag. Die beste Bildung von Sclerotien war von Glukose unterhalten. Ammonium sulfat war gut benützt ebenso wie K und Na nitrate. Ammonium phosphat ergab die beste Bildung von Sclerotien. Der Pilz ertrug einen großen Bereich von pH, aber gutes Wachstum und Bildung von Sclerotien bevorzugten pH zwischen 4 bis 5.5 |
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