Vitality and ageing of the ectomycorrhizae of damaged and undamaged trees

Ritter, Thomas; Kottke, Ingrid; Oberwinkler, Franz

doi:10.1016/0167-8809(90)90072-l

Cited by 4 publications

(1 citation statement)

References 8 publications

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“…The percentages of dead mycorrhizas were very similar in the long-term experiment, with 10 % in control and 29 % in limed plots, and the present experiment in which the corresponding figures were 9 % and 25 % in September. In the study of Ritter et al (1990) liming reduced the degree of damage in mycorrhizas, yet there was a low percentage of entirely active mycorrhizas on limed plots. This corroborates the conclusion by that the effects of lime on mycorrhizas of Norway spruce are directly caused by the changes in the soil environment rather than mediated by the nutrition and physiology of the above-ground parts of the tree.…”

Section: Discussionmentioning

confidence: 89%

Effects of soil pH and calcium on mycorrhizas of Picea abies

Lehto¹

1994

Plant Soil

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The effects of lime, increased soil pH and increased soil Ca concentration on the mycorrhizas of Norway spruce.[Picea abies (L.) Karst.] were studied independently of each other to elucidate the different mechanisms through which lime may influence mycorrhizas in acidic soil. In a field experiment (mature Norway spruce in podzol), lime was applied as CaCO3; increased Ca concentration without an increase in pH was achieved with CaSO4; and soil pH was increased without calcium by means of Na2CO3 and K2CO3 (Na+K treatment). Treatments were done in October, and mycorrhizas were counted from samples collected in the following June and September. All treatments increased the percentage of dead short root tips compared to controls in September, and Na+K already in June. Cenococcum geophilum Fr. increased in proportion in plots treated with Na+K.In a sand culture experiment, Norway spruce seedlings were grown from seed and inoculated with Cenococcum geophilum, or root inoculum, or left uninoculated. When mycorrhizas were beginning to form, CaCO3 and CaSO4 treatments were applied. Six weeks later, the percent of dead short root tips in both salt treatments was significantly increased from control, but formation of mycorrhizas was not inhibited by treatments.As all the treatments increased the proportion of dead short root tips, it is concluded that lime directly and adversely affected mycorrhizas of Norway spruce in sand culture and in mor humus. Both increased ionic strength and increased pH may be reasons for this rather than Ca 2+ specifically.

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Section: Discussionmentioning

confidence: 89%

Effects of soil pH and calcium on mycorrhizas of Picea abies

Lehto¹

1994

Plant Soil

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Mycorrhizae: Ectomycorrhiza and Ectendomycorrhiza

Agerer

1993

Progress in Botany / Fortschritte Der Botanik

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As new class of "mycorrhizal" interactions the "lycoperdioid mycothallus interaction" (Schmid and Oberwinkler 1993) is proposed and studied in detail. It is characterized by aseptate, intracellularly regularly coiled, partly swollen hyphae, forming vesicles but no arbuscles and is formed within the gametophyte of Lycopodium clavatum. Intercellular hyphae may branch, resembling the hyphal behaviour of a Hartig net.

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