Germination of Cochliobolus Conidia during Constant Hydrostatic Pressure
Effects of Physical Factors upon the Plant Diseases IV
1972 Volume 38 Issue 2 Pages 91-94_2
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1972 Volume 38 Issue 2 Pages 91-94_2
When conidia of Cochliobolus miyabeanus were held for 5 hours at 28°C under increasing hydrostatic pressures (100-500kg/cm2), the length of germ tubes decreased with increasing pressure, and their forms changed from filamentous to elliptical to spherical. In control germ tubes the nuclei were scattered in a cell, whereas at 200kg/cm2 the nuclei were clustered. No germination occurred at 600kg/cm2 and above.
When conidia which were obtained by compression at 100-700kg/cm2 as above were kept under suitable condition for germination on slide, ordinary germ tubes elongated vigorously from abnormal germ tubes and from ungerminated conidia. Percentage of abnormal branching in these germ tubes increased with increasing pressure.
