Trap Induction and Trapping in Eight Nematode-trapping Fungi (Orbiliaceae) as Affected by Juvenile Stage of <Emphasis Type="Italic">Caenorhabditis elegans</Emphasis> |
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Authors: | Hongyan Xie F M Aminuzzaman Lingling Xu Yiling Lai Feng Li Xingzhong Liu |
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Institution: | (1) Key Laboratory of Systematic Mycology and Lichenology, Institute of Microbiology, Chinese Academy of Sciences, No. 3 1st Beichen West Road, Chaoyang District, Beijing, 100101, China; |
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Abstract: | This study measured trap induction and trapping on agar disks as affected by juvenile stages (J1, J2, J3, and J4) of the nematode
Caenorhabditis elegans and by species of nematode-trapping fungi. Eight species of nematode-trapping fungi belonging to the family Orbiliaceae and
producing four kinds of traps were studied: adhesive network-forming Arthrobotrys oligospora, A. vermicola, and A. eudermata, constricting ring-forming Drechslerella brochopaga, and Dr. stenobrocha, adhesive column-forming Dactylellina cionopaga, and adhesive knob-forming Da. ellipsospora, and Da. drechsleri. The number of traps induced generally increased with increasing juvenile stages of C. elegans. The ability to capture the juveniles tended to be similar among isolates that produced the same kind of trap but differed
among species that produced different kinds of traps. Trapping by Dr. stenobrocha and Da. cionopaga was correlated with trap number and with juvenile stage. A. oligospora and A. vermicola respectively captured more than 92 and 88% of the J1, J3, and J4 but captured a lower percentage of J2. The knob-producing
isolates captured more younger than elder juveniles. Partial correlation analyses demonstrated that the trap induction of
the most fungal species positively correlated with the juvenile size and motility, which was juvenile stage dependent. Overall,
trap induction and trapping correlated with C. elegans juvenile stage (size and motility) in six species of trapping fungi. |
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