caa a22 4500 469092815 CHVBK 20180323133022.0 cr unu---uuuuu 170328e19920401xx s 000 0 eng 10.1007/BF00584228 doi (NATIONALLICENCE)springer-10.1007/BF00584228 Adhesive knob formation by conidia of the nematophagous fungus Drechmeria coniospora [Elektronische Daten] [P. van den Boogert, J. Dijksterhuis, H. Velvis, M. Veenhuis] We studied conidiogenesis and adhesive knob formation (maturation) by newly developed conidia of the nematophagous fungusDrechmeria coniospora. Upon conidiogenesis on infected nematodes or during saprophytic growth of the fungus in axenic cultures compact clusters of conidia developed. Less than 10% of such clustered conidia matured; mature conidia were invariably located on the periphery of the clusters. The kinetics and rate of maturation of conidia were studied inin vitro systems and in soil. In both cases adhesive knobs were formed; the rate at which knobs were formed appeared to be determined by the age of the conidia, the temperature and the soil moisture. In addition, knob formation was suppressed at increasing conidial densities. Under favorable conditions, however, over 90% of the conidia matured within a period of 3 days. The rate of knob formation was neither influenced by the presence of nematodes nor by that of exogenous nutrients, which suggests that maturation is an autonomous process. Electron-microscopical analysis indicated that budding of the conidia at the initial stage of maturation occurred simultaneously with the deposition of the sticky, adhesive layer around the wall of the developing knob. The ecological significance of the time- and spatially separated maturation of conidia after conidiogenesis is discussed with respect to survival of the conidia. Kluwer Academic Publishers, 1992 adhesive knobs nationallicence conidiogenesis nationallicence Drechmeria coniospora nationallicence nematodes nationallicence nematophagous fungi nationallicence van den Boogert P. DLO-Institute for Soil Fertility Research, P.O. Box 30003, 9750 RA, Haren, The Netherlands aut Dijksterhuis J. Laboratory for Electron Microscopy, University of Groningen, Kerklaan 30, 9751 NN, Haren, The Netherlands aut Velvis H. DLO-Institute for Soil Fertility Research, P.O. Box 30003, 9750 RA, Haren, The Netherlands aut Veenhuis M. Laboratory for Electron Microscopy, University of Groningen, Kerklaan 30, 9751 NN, Haren, The Netherlands aut Antonie van Leeuwenhoek Kluwer Academic Publishers 61/3(1992-04-01), 221-229 0003-6072 61:3<221 1992 61 10482 https://doi.org/10.1007/BF00584228 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00584228 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- van den Boogert P. DLO-Institute for Soil Fertility Research, P.O. Box 30003, 9750 RA, Haren, The Netherlands aut NATIONALLICENCE 700 1- Dijksterhuis J. Laboratory for Electron Microscopy, University of Groningen, Kerklaan 30, 9751 NN, Haren, The Netherlands aut NATIONALLICENCE 700 1- Velvis H. DLO-Institute for Soil Fertility Research, P.O. Box 30003, 9750 RA, Haren, The Netherlands aut NATIONALLICENCE 700 1- Veenhuis M. Laboratory for Electron Microscopy, University of Groningen, Kerklaan 30, 9751 NN, Haren, The Netherlands aut NATIONALLICENCE 773 0- Antonie van Leeuwenhoek Kluwer Academic Publishers 61/3(1992-04-01), 221-229 0003-6072 61:3<221 1992 61 10482 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer