منابع مشابه
Nematode-Trapping Fungi Eavesdrop on Nematode Pheromones
The recognition of molecular patterns associated with specific pathogens or food sources is fundamental to ecology and plays a major role in the evolution of predator-prey relationships. Recent studies showed that nematodes produce an evolutionarily highly conserved family of small molecules, the ascarosides, which serve essential functions in regulating nematode development and behavior. Here,...
متن کاملEvolution of parasitism in nematode-trapping fungi.
We are studying the evolution of parasitism in a group of soil-living ascomycetes that can grow as saprophytes as well as parasites by forming special morphological structures called traps. Analyses of 18S ribosomal DNA sequences have shown that these fungi form a monophyletic and isolated clade among the ascomycetes. The phylogenetic patterns within this clade are concordant with the morpholog...
متن کاملScreening of Soil and Sheep Faecal Samples for Predacious Fungi: Isolation and Characterization of the Nematode-Trapping Fungus Arthrobotrys oligospora
Over one-year period, 150 pasture soil samples and 138 sheep faecal samples, collected from different parts of Iran were screened for the presence of nematophagous fungi. The samples were cultured at 25ºC on chloramphenicol-2% water agar (CHF-WA) plates in the presence of Haemonchus contortus third stage larvae (L3) and checked over a two-month period for characteristic conidia, conidiophores a...
متن کاملBacteria can mobilize nematode-trapping fungi to kill nematodes
In their natural habitat, bacteria are consumed by bacterivorous nematodes; however, they are not simply passive preys. Here we report a defensive mechanism used by certain bacteria to mobilize nematode-trapping fungi to kill nematodes. These bacteria release urea, which triggers a lifestyle switch in the fungus Arthrobotrys oligospora from saprophytic to nematode-predatory form; this predaciou...
متن کاملIsolation and Molecular Characterization of Indian Isolates of Nematode Trapping Fungi
Two nematode trapping fungi were isolated from aerated soil samples collected fron Anand district( Gujarat) India and identified on the basis of their culture –morphological characteristics and 18S rRNA gene sequencing as Arthrobotrys oligospora and Duddingtonia flagrans . These fungal isolates were assessed for their trapping efficiency further. Trapping structures such as ring like structures...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 1972
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.110.3.1163-1170.1972