caa a22 4500 477109896 CHVBK 20180405111605.0 cr unu---uuuuu 170330e19960901xx s 000 0 eng 10.1007/BF02257525 doi (NATIONALLICENCE)springer-10.1007/BF02257525 Interactions between the soilborne root pathogen Phytophthora nicotianae var. parasitica and the arbuscular mycorrhizal fungus Glomus mosseae in tomato plants [Elektronische Daten] [A. Trotta, G. Varese, E. Gnavi, A. Fusconi, S. Sampò, G. Berta] In order to study the influence of Arbuscular Mycorrhiza (AM) on the development of root rot infection, tomato plants were raised with or withoutGlomus mosseae and/orPhytophthora nicotianae var.parasitica in a sand culture system. All plants were fed with a nutrient solution containing one of two phosphorus (P) levels, 32µM (I P) or 96µM (II P), to test the consequence of enhanced P nutrition by the AM fungus on disease dynamics. Mycorrhizal plants had a similar development to that of control plants. Treatment withPhytophthora nicotianae var.parasitica resulted in a visible reduction in plant weight and in a widespread root necrosis in plants without mycorrhiza. The presence of the AM fungus decreased both weight reduction and root necrosis. The percentage reduction of adventitious root necrosis and of necrotic root apices ranged between 63 and 89% The enhancement of P nutrition increased plant development, but did not appreciably decrease disease spread. In our system, mycorrhiza increased plant resistance toP. nicotianae var.parasitica infection. Although a contribution of P nutrition by mycorrhiza cannot be excluded, other mechanisms appear to play a crucial role. Kluwer Academic Publishers, 1996 arbuscular mycorrhiza nationallicence biological control nationallicence Phytophthora nicotianae var. parasitica nationallicence P nutrition nationallicence root morphology nationallicence tomato nationallicence AM : arbuscular mycorrhizae nationallicence G− Phy− : plants withoutG. mosseae norP. nicotianae var.parasitica nationallicence G+ Phy− : plants withG. mosseae but withoutP. nicotianae var.parasitica nationallicence G− Phy+ : plants withoutG. mosseae but with P. nicotianae var.parasitica nationallicence G+ Phy+ : plants with bothG. mosseae andP. nicotianae var.parasitica nationallicence I P : first phosphorus level (32µM) nationallicence II P : second phosphorus level (96µM) nationallicence Trotta A. Dipartimento di Biologia Vegetale, Università di Torino, Viale Mattioli 25, 10125, Torino, Italy aut Varese G. Dipartimento di Scienze e Tecnologie Avanzate, Università di Torino, Via Borsalino 54, 15100, Alessandria, Italy aut Gnavi E. Dipartimento di Biologia Vegetale, Università di Torino, Viale Mattioli 25, 10125, Torino, Italy aut Fusconi A. Dipartimento di Biologia Vegetale, Università di Torino, Viale Mattioli 25, 10125, Torino, Italy aut Sampò S. Dipartimento di Scienze e Tecnologie Avanzate, Università di Torino, Via Borsalino 54, 15100, Alessandria, Italy aut Berta G. Dipartimento di Scienze e Tecnologie Avanzate, Università di Torino, Via Borsalino 54, 15100, Alessandria, Italy aut Plant and Soil Kluwer Academic Publishers 185/2(1996-09-01), 199-209 0032-079X 185:2<199 1996 185 11104 https://doi.org/10.1007/BF02257525 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02257525 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Trotta A. Dipartimento di Biologia Vegetale, Università di Torino, Viale Mattioli 25, 10125, Torino, Italy aut NATIONALLICENCE 700 1- Varese G. Dipartimento di Scienze e Tecnologie Avanzate, Università di Torino, Via Borsalino 54, 15100, Alessandria, Italy aut NATIONALLICENCE 700 1- Gnavi E. Dipartimento di Biologia Vegetale, Università di Torino, Viale Mattioli 25, 10125, Torino, Italy aut NATIONALLICENCE 700 1- Fusconi A. Dipartimento di Biologia Vegetale, Università di Torino, Viale Mattioli 25, 10125, Torino, Italy aut NATIONALLICENCE 700 1- Sampò S. Dipartimento di Scienze e Tecnologie Avanzate, Università di Torino, Via Borsalino 54, 15100, Alessandria, Italy aut NATIONALLICENCE 700 1- Berta G. Dipartimento di Scienze e Tecnologie Avanzate, Università di Torino, Via Borsalino 54, 15100, Alessandria, Italy aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers 185/2(1996-09-01), 199-209 0032-079X 185:2<199 1996 185 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer