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6032137 
Journal Article 
The impermeability of powdery mildew conidia and their germination in arid environments 
Ball, E; Gay, JL; Martin, M 
1985 
1 
Plant Pathology
ISSN: 0032-0862
EISSN: 1365-3059 
34 
3 
353-362 
Conidia of Erysiphe graminis formed germ hyphae while floating on aqueous solutions of glutaraldehyde, formaldehyde, NaF, HgCl, and HgCl sub(2). Inhibition of germination ranged from 60 multiplied by 1% (NaF) to 88 multiplied by 8% (HgCl sub(2)). In an atmosphere of HCN gas inhibition was 72 multiplied by 8%. The detergents Triton X-100, sodium dodecylsulphate and cetyl trimethylammonium bromide caused approximately 90% inhibition. Similar results were obtained in less extensive experiments with E. pisi) conidia. The results are discussed with reference to the presence and nature of permeation barriers at conidial and hyphal surfaces and to the mechanism which enables powdery mildew conidia to germinate in arid environments. 
germination; factors affecting; Microbiology Abstracts A: Industrial & Applied Microbiology; Microbiology Abstracts C: Algology, Mycology & Protozoology; powdery mildew; Erysiphe pisi; conidia; Erysiphe graminis; K 03089:Fungi: plant; A 01026:Gramineous crops