Production of Oogonia and Oospores of Leptolegnia chapmanii Seymour (Straminipila: Peronosporomycetes) in Aedes aegypti (L.) Larvae at Different Temperatures

The aquatic oomycete fungus Leptolegnia chapmanii Seymour is pathogenic to mosquito larvae, but it has been little studied since it was first isolated. Although studies have been performed on different biological isolates of L. chapmanii around the world, they were made on zoospores and a very littl...

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Published inMycopathologia (1975) Vol. 169; no. 1; pp. 71 - 74
Main Authors Pelizza, S. A, Scorsetti, A. C, Lastra, C. C. López, García, J. J
Format Journal Article
LanguageEnglish
Published Dordrecht Dordrecht : Springer Netherlands 2010
Springer Netherlands
Springer Nature B.V
Subjects
Aedes - microbiology
Aedes aegypti
Animals
Biomedical and Life Sciences
Cell culture
Ecosystem
Eukaryotic Microbiology
Fungi
Infections
Larva - microbiology
Leptolegnia
Leptolegnia chapmanii
Life Sciences
Medical Microbiology
Microbial Ecology
Microbiology
Mosquito Control
Mosquitoes
Oogonia - growth & development
Oomycetes
Peronosporomycetes
Plant Sciences
Saprolegnia - physiology
Spores, Fungal - growth & development
Temperature
Time Factors
Argentina
Mosquitoes
Oospores
Oogonia
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Summary:The aquatic oomycete fungus Leptolegnia chapmanii Seymour is pathogenic to mosquito larvae, but it has been little studied since it was first isolated. Although studies have been performed on different biological isolates of L. chapmanii around the world, they were made on zoospores and a very little or even nothing is known about the sexual stage (oogonia and oospores), which allows L. chapmanii to remain in the environment when conditions are not favorable. The main objective of this study was to determine the relationship between temperature and time of onset of L. chapmanii oogonia and oospores in Ae. aegypti larvae. Leptolegnia chapmanii-infected IV instar Ae. aegypti larvae were incubated at different temperatures between 5 and 45°C and photoperiod-controlled for 90 days. The number of oogonia and oospores was examined daily for each tested temperature. As was expected, low temperatures extended the times of oogonia formation, as much as seven times. Likewise, temperatures significantly affect the number of oogonia produced.
Bibliography:http://dx.doi.org/10.1007/s11046-009-9224-6
ObjectType-Article-1
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ISSN:0301-486X
1573-0832
DOI:10.1007/s11046-009-9224-6