caa a22 4500 477109764 CHVBK 20180405111605.0 cr unu---uuuuu 170330e19960901xx s 000 0 eng 10.1007/BF02257522 doi (NATIONALLICENCE)springer-10.1007/BF02257522 Effects of arbuscular mycorrhiza (AM) on health of Linum usitatissimum L. infected by fungal pathogens [Elektronische Daten] [G. Dugassa, H. von Alten, F. Schönbeck] Effects of arbuscular mycorrhizal (AM) symbiosis on health ofLinum usitatissimum infected by fungal pathogens were investigated exemplarily. Physiological and biochemical analyses were done to explain the mechanisms underlying the AM effects. AM plants showed increased resistance against the wilt pathogen (Fusarium oxysporum f. sp.lini), the level of this effects depended on the plant cultivars which all showed the same level of root colonization by arbuscular mycorrhizal fungi (AMF). In contrary to that, AM plants were highly susceptible against the shoot pathogenOidium lini, but they suffered less than non-AM plants in terms of shoot fresh weight, CO2 assimilation and content of sucrose in shoot apex. This indicates that AM not only activates resistance mechanisms but also can induce tolerance against pathogens. The concentration of phytohormones such as auxin- and gibberellin-like substances were increased in shoots of AM plants. In roots the ethylene production was increased, too. Furthermore the content and composition of free sterols were highly altered in leaves of AM plants. Root infection by AMF caused an increased respiratory activity and a reduced degree of DNA methylation, but both modifications only occurred in infected root parts indicating an increasing gene activity. The presented results suggest that nearly all parts of a plant are influenced by AM but not in the same manner. In the case of mildewed linseed the effect of AM on plant health was impressing, it indicates that AM has an ability to induce tolerance. Kluwer Academic Publishers, 1996 arbuscular mycorrhiza nationallicence Fusarium -wilt nationallicence Oidium lini nationallicence plant health nationallicence resistance nationallicence tolerance nationallicence Dugassa G. Institut für Pflanzenkrankheiten und Pflanzenschutz, Universität Hannover, Herrenhäuser Str. 2, D-30419, Hannover, Germany aut von Alten H. Institut für Pflanzenkrankheiten und Pflanzenschutz, Universität Hannover, Herrenhäuser Str. 2, D-30419, Hannover, Germany aut Schönbeck F. Institut für Pflanzenkrankheiten und Pflanzenschutz, Universität Hannover, Herrenhäuser Str. 2, D-30419, Hannover, Germany aut Plant and Soil Kluwer Academic Publishers 185/2(1996-09-01), 173-182 0032-079X 185:2<173 1996 185 11104 https://doi.org/10.1007/BF02257522 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02257522 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dugassa G. Institut für Pflanzenkrankheiten und Pflanzenschutz, Universität Hannover, Herrenhäuser Str. 2, D-30419, Hannover, Germany aut NATIONALLICENCE 700 1- von Alten H. Institut für Pflanzenkrankheiten und Pflanzenschutz, Universität Hannover, Herrenhäuser Str. 2, D-30419, Hannover, Germany aut NATIONALLICENCE 700 1- Schönbeck F. Institut für Pflanzenkrankheiten und Pflanzenschutz, Universität Hannover, Herrenhäuser Str. 2, D-30419, Hannover, Germany aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers 185/2(1996-09-01), 173-182 0032-079X 185:2<173 1996 185 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer