Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Differential contribution of arbuscular mycorrhizal fungi to plant nitrateuptake (N-15) under increasing N supply to the soil
Autore:
Azcon, R; Ruiz-Lozano, J; Rodriguez, R;
Indirizzi:
Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbiot, Granada 18008,Spain Estac Expt Zaidin Granada Spain 18008 temas Simbiot, Granada 18008,Spain
Titolo Testata:
CANADIAN JOURNAL OF BOTANY-REVUE CANADIENNE DE BOTANIQUE
fascicolo: 10, volume: 79, anno: 2001,
pagine: 1175 - 1180
SICI:
0008-4026(200110)79:10<1175:DCOAMF>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
LACTUCA-SATIVA L; NITROGEN UPTAKE; DROUGHT STRESS; REDUCTASE; TRANSPORT; AMMONIUM; GROWTH; HYPHAE; RESPONSES; INFECTION;
Keywords:
arbuscular mycorrhizae; nitrate assimilation; nitrate uptake; N-15-labeled fertilizer;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Azcon, R Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbiot, Prof Albareda 1, Granada 18008, Spain Estac Expt Zaidin Prof Albareda 1 GranadaSpain 18008 008, Spain
Citazione:
R. Azcon et al., "Differential contribution of arbuscular mycorrhizal fungi to plant nitrateuptake (N-15) under increasing N supply to the soil", CAN J BOTAN, 79(10), 2001, pp. 1175-1180

Abstract

The objective of this study was to determine how the uptake and transport of nitrate by two species of arbuscular mycorrhizal (AM) fungi is affected by its concentration in the medium and by the age of the AM symbiosis. Tracer amounts of N-15 nitrate were applied at two plant growth periods to mycorrhizal or nonmycorrhizal lettuce plants, which had been grown in soil supplied with nitrate to provide a total of 84, 168, or 252 mg N/kg. At both injection times, Glomus mosseae (Nicol. and Gerd. ) Gerd. and Trappe and Glomus fasciculatum (Thaxter sensu Gerd. ) Gerd. and Trappe reached the highest values of nitrogen derived from the fertilizer (NdfF) at 84 mg N/kg. Glomus mosseae also reached the highest values of labeled fertilizer N utilizationat 84 mg N/kg, whereas G. fasciculatum reached the highest values at 168 mg N/kg in the medium. The highest N level in the medium (252 mg N/kg) had anegative effect on % NdfF and % labeled fertilizer utilization for all mycorrhizal plants. Regarding the time of N-15 fertilizer application, G. fasciculatum-colonized plants had a minimum change in % NdfF and % labeled fertilizer utilization during the growth period (60 days application vs. 30 days application). In contrast, G. mosseae-colonized plants growing at 168 mg N/kg in the medium, decreased these two values in the latest application. The present results confirm that mycorrhizal symbiosis may be particularly important for nitrogen nutrition in plants growing in neutral-alkaline soils.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/09/20 alle ore 12:54:48