scholarly journals Ectomycorrhizal fungi and exogenous auxins influence root and mycorrhiza formation of Scots pine hypocotyl cuttings in vitro

2002 ◽  
Vol 22 (17) ◽  
pp. 1231-1239 ◽  
Author(s):  
K. Niemi ◽  
T. Vuorinen ◽  
A. Ernstsen
Keyword(s):  
Scots Pine ◽  
Ectomycorrhizal Fungi ◽  
Mycorrhiza Formation ◽  
Hypocotyl Cuttings

Application of ectomycorrhizal fungi in rooting of Scots pine fascicular shoots

2000 ◽  
Vol 30 (8) ◽  
pp. 1221-1230 ◽  
Author(s):  
Karoliina Niemi ◽  
Maija Salonen ◽  
Arild Ernstsen ◽  
Helvi Heinonen-Tanski ◽  
Hely Häggman
Keyword(s):  
Scots Pine ◽  
Ectomycorrhizal Fungi ◽  
Production Capacity ◽  
Pisolithus Tinctorius ◽  
Paxillus Involutus ◽  
Root Induction ◽  
In Vitro Production ◽  
Vitro Production

The ectomycorrhizal fungi, Pisolithus tinctorius (Pers.) Coker & Couch and three Paxillus involutus (Batsch) Fr. strains, were used to enhance in vivo rooting in fascicular shoots of 49 Scots pine (Pinus sylvestris L.) genotypes representing seed families from southern and northern Finland. Inoculation with specific fungi either increased the rooting percentage or accelerated root formation expressed as an increased number of adventitious roots per cutting. Only one of the six seed families gave no positive response. The relationship between the in vitro production of free and conjugated forms of indole-3-acetic acid (IAA) by the fungi and rooting was also investigated. Pisolithus tinctorius was the only significant producer of IAA in the absence of exogenous tryptophan. All the Paxillus involutus strains also synthesized both free and conjugated IAA but did that actively only from exogenous tryptophan. In vitro production of IAA did not correlate with root induction in vivo, but the rooting responses depended on the fungus strains and the Scots pine seed families and (or) genotypes within families. This indicates that in vitro IAA production capacity cannot be the only criterion when selecting ectomycorrhizal fungi for rooting in vivo and that specific genotype-genotype interactions play a key role in root initiation.

scholarly journals Light sources with different spectra affect root and mycorrhiza formation in Scots pine in vitro

2005 ◽  
Vol 25 (1) ◽  
pp. 123-128 ◽  
Author(s):  
K. Niemi ◽  
R. Julkunen-Tiitto ◽  
R. Tegelberg ◽  
H. Haggman
Keyword(s):  
Scots Pine ◽  
Light Sources ◽  
Mycorrhiza Formation

In vitro selection of ecologically adapted ectomycorrhizal fungi through production of fungal biomass and metabolites for use in reclamation of biotite mine tailings

Mycologia ◽  
2018 ◽  
Vol 110 (6) ◽  
pp. 1017-1032
Author(s):  
Aïda Azaiez ◽  
Martin Beaudoin Nadeau ◽  
Annick Bertrand ◽  
Damase P. Khasa
Keyword(s):  
Ectomycorrhizal Fungi ◽  
Mine Tailings ◽  
Fungal Biomass ◽  
In Vitro Selection ◽  
Selection Of

scholarly journals Mycorrhizal colonization and phenolic compounds accumulation on roots of Eucalyptus dunnii maiden inoculated with ectomycorrhizal fungi

2000 ◽  
Vol 35 (9) ◽  
pp. 1905-1910 ◽  
Author(s):  
EDUARDO LUIZ VOIGT ◽  
VETÚRIA LOPES DE OLIVEIRA ◽  
ÁUREA MARIA RANDI
Keyword(s):  
Phenolic Compounds ◽  
Ectomycorrhizal Fungi ◽  
Mycorrhizal Colonization ◽  
Hartig Net ◽  
Eucalyptus Dunnii ◽  
Pinus Spp

Compatibility between Eucalyptus dunnii and the ectomycorrhizal fungi Hysterangium gardneri and Pisolithus sp. - from Eucalyptus spp. -, Rhizopogon nigrescens and Suillus cothurnatus - from Pinus spp.-, was studied in vitro. Pisolithus sp., H. gardneri and S. cothurnatus colonized the roots. Pisolithus sp. mycorrhizas presented mantle and Hartig net, while H. gardneri and S. cothurnatus mycorrhizas presented only mantle. S. cothurnatus increased phenolics level on roots. Pisolithus sp. and R. nigrescens decreased the level of these substances. The isolates from Eucalyptus seem to be more compatible towards E. dunnii than those from Pinus. The mechanisms involved could be related, at least in the cases of Pisolithus and Suillus, to the concentration of phenolics in roots.

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