Analysis of surface structures of Cladonia mitis podetia in historic and recent collections from Greenland
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Analysis of surface structures of Cladonia mitis podetia in historic and recent collections from Greenland. / Heide-Jørgensen, Henning; Johnsen, Ib.
I: Canadian Journal of Botany, Bind 73, Nr. 3, 1995, s. 457-464.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Analysis of surface structures of Cladonia mitis podetia in historic and recent collections from Greenland
AU - Heide-Jørgensen, Henning
AU - Johnsen, Ib
PY - 1995
Y1 - 1995
N2 - Field observations in Greenland combined with a scanning electron microscopical survey have revealed a hitherto undescribed correspondence in the distribution of a brownish colour and a crust-like surface structure formed by hyphae at exposed parts of the shoot tips of podetia of Cladonia mitis. A different brownish colour pattern is caused by fungal parasites. A comparable but less prominent colour-crust syndrome was observed on C. mitis from Denmark. The colour-crust syndrome is considered an unhealthy and damaged condition, and the light microscope reveals that areas with this syndrome mainly consist of the uncovered stereome devoid of the hyphal zone containing algal colonies. In a comparative study of podetia collected up to 105 years ago in Greenland, crust-like surface structures occur more frequently since the 1970s.
AB - Field observations in Greenland combined with a scanning electron microscopical survey have revealed a hitherto undescribed correspondence in the distribution of a brownish colour and a crust-like surface structure formed by hyphae at exposed parts of the shoot tips of podetia of Cladonia mitis. A different brownish colour pattern is caused by fungal parasites. A comparable but less prominent colour-crust syndrome was observed on C. mitis from Denmark. The colour-crust syndrome is considered an unhealthy and damaged condition, and the light microscope reveals that areas with this syndrome mainly consist of the uncovered stereome devoid of the hyphal zone containing algal colonies. In a comparative study of podetia collected up to 105 years ago in Greenland, crust-like surface structures occur more frequently since the 1970s.
U2 - 10.1139/b95-046
DO - 10.1139/b95-046
M3 - Journal article
VL - 73
SP - 457
EP - 464
JO - Botany
JF - Botany
SN - 1916-2790
IS - 3
ER -
ID: 243242