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Sulphite and pH effects on CO 2 evolution by fungi growing on decomposing coniferous needles
Author(s) -
DURSUN S.,
FRANKLAND JULIET C.,
BODDY LYNNE,
INESON P.
Publication year - 1996
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1996.tb01155.x
Subject(s) - cladosporium cladosporioides , mycelium , botany , scots pine , biology , spore , phoma , horticulture , chemistry , pinus <genus>
summary The relative sensitivities of Mycena galopus (Pers.) Kummer, Phoma exigua (Desm.), Cladosporium clodosporioides (Fres.) de Vries and Aureobasidium pullulans (de Bary) Arnaud to low concentrations (12.5–100.0 μM) of sulphite (SO 2− 3 ) when growing on decomposing needles of Picea sitchensis (Bongard) Carrière (Sitka spruce) and Pinus sylvestris L. (Scots pine) were assessed. Carbon dioxide evolution from the decomposing needles was strongly inhibited by SO 3 2− at pH 3.0–4.5 P. exigua was the most sensitive of the species tested in the mycelial state, and C. cladosporioides was the most sensitive species tested as spores. Mycelium was consistently less sensitive than spores. The inhibitory effect of SO 3 2− on CO 2 , evolution was increased by increasing the SO 3 2− concentration or decreasing the pH. The concentrations shown to exert toxicity were similar to those which have been measured in rainfall in the UK, and the results provide evidence that SO 3 2− can be toxic to litter fungi at environmentally realistic concentrations.