Effects of water potential on spore germination and viability of Fusarium species.

Journal of Industrial Microbiology & Biotechnology
D Palmero LlamasJ C Tello Marquina

Abstract

Germination of macroconidia and/or microconidia of 24 strains of Fusarium solani, F. chlamydosporum, F. culmorum, F. equiseti, F. verticillioides, F. sambucinum, F. oxysporum and F. proliferatum isolated from fluvial channels and sea beds of the south-eastern coast of Spain, and three control strains (F. oxysporum isolated from affected cultures) was studied in distilled water in response to a range of water potentials adjusted with NaCl. (0, -13.79, -41.79, -70.37, -99.56 and -144.54 bars). The viability (UFC/ml) of suspensions was also tested in three time periods (0, 24 and 48 h). Conidia always germinated in distilled water. The pattern of conidial germination observed of F. verticilloides, F. oxysporum, F. proliferatum, F. chlamydosporum and F. culmorum was similar. A great diminution of spore germination was found in -13.79 bars solutions. Spore germination percentage for F. solani isolates was maximal at 48 h and -13.79 bars with 21.33% spore germination, 16% higher than germination in distilled water. F. equiseti shows the maximum germination percentage in -144.54 bars solution in 24 h time with 12.36% germination. This results did not agree with those obtained in the viability test were maximum germination was found in...Continue Reading

References

Feb 1, 1966·Journal of General Microbiology·R Marchant, M F White
Feb 9, 2005·International Journal of Food Microbiology·Marco BeyerWafik S M Ragab
Jan 17, 2008·Journal of Agricultural and Food Chemistry·Thomas D BucheliRené P Schwarzenbach
Sep 1, 1984·Oecologia·Anne-Carole ChamierSimon A Archer

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