Cleavage of chitinous elicitors from the ectomycorrhizal fungus Hebeloma crustuliniforme by host chitinases prevents induction of K + and Cl − release, extracellular alkalinization and H 2 O 2 synthesis of Picea abies cells

Planta ◽  
1997 ◽  
Vol 203 (4) ◽  
pp. 470-479 ◽  
Author(s):  
Peter Salzer ◽  
Gerhard Hebe ◽  
Achim Hager
Keyword(s):  
Picea Abies ◽  
Ectomycorrhizal Fungus ◽  
Hebeloma Crustuliniforme

Effect of three ectomycorrhizal fungi on growth and phosphorus uptake of Pinus silvestris seedlings at increasing phosphorus levels

1986 ◽  
Vol 64 (11) ◽  
pp. 2753-2757 ◽  
Author(s):  
A. Tyminska ◽  
F. Le Tacon ◽  
J. Chadoeuf
Keyword(s):  
Ectomycorrhizal Fungi ◽  
Phosphorus Uptake ◽  
Ectomycorrhizal Fungus ◽  
Laccaria Laccata ◽  
Pinus Silvestris ◽  
Thelephora Terrestris ◽  
Intensity Of Infection ◽  
Hebeloma Crustuliniforme ◽  
Different Levels ◽  
Phosphorus Levels

The objective of this study was to determine the different effects of three ectomycorrhizal fungi (Laccaria laccata, Hebeloma crustuliniforme, and Thelephora terrestris) on the growth and mineral nutrition of Pinus silvestris at different levels of soluble phosphorus. Even a low intensity of infection by Laccaria laccata stimulated Pinus silvestris growth greatly. The ability of this ectomycorrhizal fungus to increase Pinus silvestris growth seemed to be more related to its capacity to produce growth substances than to its capacity to stimulate phosphorus uptake. The poor efficiency of Hebeloma crustuliniforme compared with Laccaria laccata at any level of phosphorus could result from differences in diversion of carbohydrates from the host to fungal structures.

Peroxidase and laccase activities in mycorrhizal and non-mycorrhizal fine roots of Norway spruce (Picea abies) and larch (Larix decidua)

1997 ◽  
Vol 75 (6) ◽  
pp. 932-938 ◽  
Author(s):  
B. Münzenberger ◽  
T. Otter ◽  
A. Polle ◽  
D. Wüstrich
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Tree Species ◽  
Laccase Activity ◽  
Lateral Roots ◽  
Ectomycorrhizal Fungus ◽  
Larix Decidua ◽  
Peroxidase Isozymes ◽  
Laccaria Amethystea ◽  
Axenic Conditions

Peroxidase (EC 1.11.1.7) and laccase (EC 1.10.3.1) activities were determined in mycorrhizal and non-mycorrhizal main and lateral roots of Picea abies (L.) Karst. (Norway spruce) and Larix decidua Mill, (larch) and in mycelia of the ectomycorrhizal fungus Laccaria amethystea (Bull.) Murr. grown under axenic conditions. Peroxidase isozyme patterns were identified after isoelectric focussing. In both tree species, mycorrhizae contained the lowest, and laterals of noninoculated plants the highest, peroxidase activities. Pure mycelia of Laccaria amethystea contained considerable laccase activity but no peroxidase activity. Laccase activity was barely detected in noninoculated laterals of spruce, but was present in noninoculated laterals of larch and in main roots of Norway spruce and larch. Highest laccase activities were found in mycorrhizae of both tree species, indicating that most of the activity was derived from the fungus. Laterals of Norway spruce contained eight, and those of larch five, acidic peroxidase isozymes. In mycorrhizae of Norway spruce and larch, specific peroxidase isozymes with pI values of 4.5 and 6.2 and 5.8 and 6.0, respectively, were almost completely suppressed. The specific suppression of peroxidase suggests that the fungal symbiont is able to modify the host defence response in mature mycorrhizae. Key words: defence mechanism, laccase, mycorrhiza, peroxidase (isozymes), plant–fungus interaction.

Rapid reactions of spruce cells to elicitors released from the ectomycorrhizal fungus Hebeloma crustuliniforme, and inactivation of these elicitors by extracellular spruce cell enzymes

Planta ◽  
1996 ◽  
Vol 198 (1) ◽  
Author(s):  
Peter Salzer ◽  
Gerhard Hebe ◽  
Andreas Reith ◽  
Barbara Zitterell-Haid ◽  
Harald Stransky ◽  
...  
Keyword(s):  
Ectomycorrhizal Fungus ◽  
Hebeloma Crustuliniforme
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