scholarly journals Fungus Spore Germination Inhibited by Blue and Far Red Radiation

1971 ◽  
Vol 47 (5) ◽  
pp. 729-730 ◽  
Author(s):  
L. Calpouzos ◽  
Ho-Shii Chang
Keyword(s):  
Spore Germination ◽  
Fungus Spore ◽  
Red Radiation

Soil fungistasis: fungus spore germination in soil at spore densities corresponding to natural population levels

1974 ◽  
Vol 20 (5) ◽  
pp. 751-754 ◽  
Author(s):  
Gary J. Griffin ◽  
Robert H. Ford
Keyword(s):  
Natural Population ◽  
Spore Germination ◽  
Tube Length ◽  
Test Fungus ◽  
Germ Tube Length ◽  
Fungus Spore ◽  
Soil Fungistasis ◽  
Time Observation ◽  
First Time ◽  
Spore Densities

An autoradiographic spore-location technique is described that allows for the first time observation of spore germination in soil at low natural population levels (103 to 104 spores/g soil). When Fusarium solani f. sp. phaseoli was used as a test fungus, percentage macroconidial germination was greatest in nonsterile soil at 3 × 103 and 3 × 104 conidia/g soil, and percentage germination decreased sharply with increasing conidial density. Mean germ tube length was greater at 3 × 103 than at 3 × 104 conidia/g soil. The results indicate that inhibition of spore germination (apparent soil fungistasis) of a fungus in soil environments at conventionally used high spore densities (105 to 106 spores/g soil) may not mean that spores of the fungus will be equally inhibited in the same environments at lower natural population levels.

Suppression of vesicular–arbuscular mycorrhizal fungus spore germination by nonsterile soil

1989 ◽  
Vol 67 (1) ◽  
pp. 18-23 ◽  
Author(s):  
G. W. T. Wilson ◽  
B. A. Daniels Hetrick ◽  
D. Gerschefske Kitt
Keyword(s):  
Spore Germination ◽  
Arbuscular Mycorrhizal Fungus ◽  
Mycorrhizal Fungus ◽  
Arbuscular Mycorrhizal ◽  
Dry Weight ◽  
Available Phosphorus ◽  
Nonsterile Soil ◽  
Surface Sterilization ◽  
Vesicular Arbuscular ◽  
Fungus Spore

When the effect of nonsterile soil on vesicular–arbuscular mycorrhizal fungus spore germination was examined, significantly fewer Glomus etunicatum (22 vs. 63 and 64%) or Glomus mosseae (23 vs. 80 and 79%) spores germinated in nonsterile soil than in autoclaved or pasteurized soil, respectively. In some cases, addition of nonsterile soil sievings to autoclaved or pasteurized soil also reduced germination, as compared with germination in unamended pasteurized or autoclaved soil. Germination was reduced by as much as 45% in autoclaved or pasteurized soil if spores were surface sterilized. However, surface sterilization of G. etunicatum spores did not affect dry weight of inoculated big bluestem plants, but mycorrhizal root colonization was reduced when spore-associated microbes were removed from spores by surface sterilization. The detrimental effect of soil microbes on spore germination and mycorrhizal growth response may reflect microbial competition for nutrients since germination of G. etunicatum and G. mosseae was reduced when pasteurized soil was amended with 15, 30, or 60 ppm phosphorus and 60 ppm phosphorus, respectively. An optimum range of available phosphorus may exist, above or below which germination is suppressed.

scholarly journals Extraction of chelerythrine and its effects on pathogenic fungus spore germination

2017 ◽  
Vol 13 (52) ◽  
pp. 600 ◽  
Author(s):  
Min Zhao ◽  
Qinghui Wei ◽  
Xiaoyan Li
Keyword(s):  
Spore Germination ◽  
Pathogenic Fungus ◽  
Fungus Spore
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