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Germination and production ofMacrophomina phaseolina microsclerotia as affected by oxygen and carbon dioxide concentration |
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| Authors: | T. D. Wyllie S. Gangopadhyay W. R. Teague R. W. Blanchar |
| Affiliation: | (1) Dept. of Plant Pathology, University of Missouri-Columbia, 65211 Columbia, MO, USA;(2) C.R.R.I., 753006 Cuttack, Orissa, India;(3) Dept. of Agronomy, respectively, University of Missouri-Columbia, 65211 Columbia, Mo, USA |
| Abstract: | Summary Germination of microsclerotia ofMacrophomina phaseolina was observed at O2 concentrations of 16% or higher in autoclaved soil. Germination was delayed but otherwise unaffected as O2 decreased from 21 to 16% and was in all cases complete in 32 hours. Laboratory-produced microsclerotia consistently germinated more rapidly and seemed more independent of O2 concentrations within the range that permitted germination than naturallyproduced microsclerotia.Population changes in soil as measured by microsclerotial counts were inversely correlated with depth of interment and reduced O2 concentration. Our inability to detect significantly growth responses ofM. phaseolina in non autoclaved soil was apparently related to limited O2 although other possibilities are discussed.Contribution of the Missouri Agricultural Experiment Station Scientific Journal Series No. 9124. |
| Keywords: | Charcoalrot Germination Macrophomina phaseolina Microsclerotia Oxygen Sclerotia Survival |
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