Arbuscular mycorrhizal fungi differentially affect the response to high zinc concentrations of two registered poplar clones.
The effects of a high concentration of zinc on two registered clones of poplar (Populus alba Villafranca and Populus nigra Jean Pourtet), inoculated or not with two arbuscular mycorrhizal fungi (Glomus mosseae or Glomus intraradices) before transplanting them into polluted soil, were investigated, with special regard to the extent of root colonization by the fungi, plant growth, metal accumulation in the different plant organs, and leaf polyamine concentration. Zinc accumulation was lower in Jean Pourtet than in Villafranca poplars, and it was mainly translocated to the leaves; the metal inhibited mycorrhizal colonization, compromised plant growth, and, in Villafranca, altered the putrescine profile in the leaves. Most of these effects were reversed or reduced in plants pre-inoculated with G. mosseae. Results indicate that poplars are suitable for phytoremediation purposes, confirming that mycorrhizal fungi can be useful for phytoremediation, and underscore the importance of appropriate combinations of plant genotypes and fungal symbionts.
Lingua
Guido
G
Dipartimento di Scienze dell'Ambiente e della Vita, Università del Piemonte Orientale Amedeo Avogadro, Alessandria, Italy. guido.lingua@mfn.unipmn.it
Franchin
Cinzia
C
Todeschini
Valeria
V
Castiglione
Stefano
S
Biondi
Stefania
S
Burlando
Bruno
B
Parravicini
Valerio
V
Torrigiani
Patrizia
P
Berta
Graziella
G
D001673:Biodegradation, Environmental; D019976:Cloning, Organism; D007558:Italy; D038821:Mycorrhizae / Q000254:growth & development*; D018515:Plant Leaves / Q000737:chemistry; D018517:Plant Roots / Q000382:microbiology; D011073:Polyamines / Q000032:analysis; D032107:Populus / Q000235:genetics / Q000254:growth & development* / Q000382:microbiology*; D012989:Soil Pollutants / Q000633:toxicity*; D013045:Species Specificity; D015032:Zinc / Q000633:toxicity*
D011073:Polyamines; D012989:Soil Pollutants; D015032:Zinc