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Title: Cryopreservation of ectomycorrhizal fungi has minor effects on root colonization of Pinus sylvestris plantlets and their subsequent nutrient uptake capacity
Authors: Crahay, Charlotte
Munaut, Francoise
Declerck, Stephane
Issue Date: 2013
Publisher: SPRINGER
Source: MYCORRHIZA, 23 (6), p. 463-471
Abstract: The use of ectomycorrhizal (ECM) fungi for afforestation, bioremediation, and timber production requires their maintenance over long periods under conditions that preserve their genetic, phenotypic, and physiological stability. Cryopreservation is nowadays considered as the most suitable method to maintain the phenotypic and genetic stability of a large number of filamentous fungi including the ECM fungi. Here, we compared the ability of eight ECM fungal isolates to colonize Pinus sylvestris roots and to transport inorganic phosphate (Pi) and NH4 (+) from the substrate to the plant after cryopreservation for 6 months at -130 A degrees C or after storage at 4 A degrees C. Overall, the mode of preservation had no significant effect on the colonization rates of P. sylvestris, the concentrations of ergosterol in the roots and substrate, and the uptake of Pi and NH4 (+). Comparing the isolates, differences were sometimes observed with one or the other method of preservation. Suillus bovinus exhibited a reduced ability to form mycorrhizas and to take up Pi following cryopreservation, while one Suillus luteus isolate exhibited a decreased ability to take up NH4 (+). Conversely, Hebeloma crustuliniforme, Laccaria bicolor, Paxillus involutus, and Pisolithus tinctorius exhibited a reduced ability to form mycorrhizas after storage at 4 A degrees C, although this did not result in a reduced uptake of Pi and NH4 (+). Cryopreservation appeared as a reliable method to maintain important phenotypic characteristics (i.e., root colonization and nutrient acquisition) of most of the ECM fungal isolates studied. For 50 % of the ECM fungal isolates, the colonization rate was even higher with the cultures cryopreserved at -130 A degrees C as compared to those stored at 4 A degrees C.
Notes: [Crahay, Charlotte; Declerck, Stephane] Catholic Univ Louvain, Earth & Life Inst, B-1348 Louvain, Belgium. [Wevers, Jan; Colpaert, Jan V.] Univ Hasselt, Ctr Environm Sci, Environm Biol Grp, B-3590 Diepenbeek, Belgium. [Munaut, Francoise] Catholic Univ Louvain, Earth & Life Inst, Mycotheque Univ Catholique Louvain BCCM MUCL, B-1348 Louvain, Belgium.;;;;
Keywords: Mycology;Cryopreservation; Ectomycorrhizal fungi; Root colonization; Pi and NH4+ transport; 4 degrees C storage
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ISSN: 0940-6360
e-ISSN: 1432-1890
DOI: 10.1007/s00572-013-0489-8
ISI #: 000321914200003
Category: A1
Type: Journal Contribution
Validations: ecoom 2014
Appears in Collections:Research publications

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