Effect of temperature and water activity on spore germination and mycelial growth of three fungal biocontrol agents against water hyacinth (Eichhornia crassipes)

Dagno, Karim; Lahlali, Rachid; Diourté, M.; Jijakli, Haissam

doi:10.1111/j.1365-2672.2010.04908.x

Article (Scientific journals)

Effect of temperature and water activity on spore germination and mycelial growth of three fungal biocontrol agents against water hyacinth (Eichhornia crassipes)

Dagno, Karim; Lahlali, Rachid; Diourté, M. et al.

2011 • In Journal of Applied Microbiology, 110, p. 521-528

Peer Reviewed verified by ORBi

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https://hdl.handle.net/2268/81514

DOI
10.1111/j.1365-2672.2010.04908.x

PubMed
21143713

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Keywords :

Biocontrol agents; growth rate; viable conidia; predictive models; Temperature; water activity

Abstract :

[en] The fungi were grown in vitro on plates containing potato dextrose agar medium at different aw values (glycerol being added to adjust the aw). The percentage of viable conidia and radial growth rate decreased with decreasing water activity. Statistical analysis showed a significant effect of aw, temperature and the aw temperature interaction on mycelial growth (P < 0Æ0001). Water activity emerged as the factor exerting the greatest influence. Differences were observed between the fungi tested, the C. malorum appearing more tolerant to low aw and the F. sacchari more tolerant to high temperature (35 C). Growth models predicting the combined effect of aw and temperature were developed and response surfaces generated, showing fairly good agreement with the experimental values. Conclusions: Our results confirm the previous finding that aw has a greater influence than temperature on fungal growth. Under most conditions, variation of environmental factors has a detrimental influence on the percentage of viable conidia and mycelial growth rate of fungal isolates.

Disciplines :

Phytobiology (plant sciences, forestry, mycology...)
Agriculture & agronomy

Author, co-author :

Dagno, Karim ; Université de Liège - ULiège > Sciences agronomiques > Phytopathologie

Lahlali, Rachid

Diourté, M.

Jijakli, Haissam ; Université de Liège - ULiège > Sciences agronomiques > Phytopathologie

Language :

English

Title :

Effect of temperature and water activity on spore germination and mycelial growth of three fungal biocontrol agents against water hyacinth (Eichhornia crassipes)

Alternative titles :

[fr] Effet de la température et de l'activité d'eau sur la germination et la croissance de 3 agents fongiques de lutte biologique contre la jacinthe d'eau (Eichhornia crassipes)

Publication date :

February 2011

Journal title :

Journal of Applied Microbiology

ISSN :

1364-5072

eISSN :

1365-2672

Publisher :

Blackwell, Oxford, United Kingdom

Volume :

110

Pages :

521-528

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 11 January 2011

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