Tolerance and induction of tolerance to Ni of arbuscular mycorrhizal fungi from New Caledonian ultramafic soils.
The influence of Ni on arbuscular mycorrhizal fungi (AMF) has not been studied yet. We tested the tolerance to Ni of five AMF isolates from New Caledonian ultramafic soils. Spore germination indicated that these isolates were clearly more tolerant to Ni than three other isolates from non-ultramafic soils. They were able to germinate at 30 microg g(-1) Ni, whereas spores of the non-ultramafic isolates were totally inhibited at 15 microg g(-1) Ni. Among the ultramafic isolates, two were obtained from roots of Ni-hyperaccumulating plants. Their tolerance to Ni was clearly higher than all the other isolates. The proportion of germinated spores of the different isolates in contact with ultramafic soils showed the same tendencies as those observed with Ni solutions. Tolerance to Ni increased when spores were produced from mycorrhiza on plants grown on sand containing 20 microg g(-1) Ni, in comparison with those produced on sand without Ni. These results indicate that the tolerance to Ni of AMF spores can be induced by the presence of this metal in the substrate.
Amir
Hamid
H
Laboratoire Insulaire du Vivant et de l'Environnement, Université de la Nouvelle-Calédonie, BP R4, 98851, Noumea Cedex, New Caledonia. amir@univ-nc.nc.
Jasper
David A
DA
School of Earth and Geographical Sciences, The University of Western Australia, 35 Stirling Highway Crawley, Perth, Western Australia, 6009, Australia.
Abbott
Lynette K
LK
School of Earth and Geographical Sciences, The University of Western Australia, 35 Stirling Highway Crawley, Perth, Western Australia, 6009, Australia.
D005658:Fungi / Q000302:isolation & purification / Q000502:physiology*; D038821:Mycorrhizae / Q000302:isolation & purification / Q000502:physiology*; D009510:New Caledonia; D009532:Nickel / Q000378:metabolism*; D012987:Soil / Q000032:analysis; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000378:metabolism*; D013172:Spores, Fungal / Q000502:physiology
D012987:Soil; D012989:Soil Pollutants; D009532:Nickel
Mycorrhiza. 2003 Jun;13(3):151-7
12836083
Science. 1976 Aug 13;193(4253):579-80
17759588
Environ Pollut. 2006 Jan;139(2):362-71
15998561
Chemosphere. 2006 Dec;65(11):1959-65
16905176
Chemosphere. 2007 Jan;66(5):905-15
16872660
Fungal Genet Biol. 2005 Feb;42(2):130-40
15670711
J Plant Physiol. 2005 Jun;162(6):634-49
16008086
Environ Pollut. 2005 Mar;134(2):257-66
15589653
Biochem Biophys Res Commun. 2005 Jul 22;333(1):150-5
15939401
Mycorrhiza. 2006 Oct;16(7):449-458
16944222
Mol Gen Genet. 2001 Jan;264(5):604-12
11212915
Planta. 2006 May;223(6):1115-22
16555102
Phytochemistry. 2007 Jan;68(1):139-46
17078985
Appl Environ Microbiol. 2004 Nov;70(11):6643-9
15528529
Plant Physiol. 2002 Sep;130(1):58-67
12226486
Environ Pollut. 2007 Jun;147(3):609-14
17118259
Appl Environ Microbiol. 2004 Dec;70(12):7413-7
15574943
Mycol Res. 2003 Nov;107(Pt 11):1253-65
15000228