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oai:nipr.repo.nii.ac.jp:00005125 2023-07-25T12:13:44Z 1259:1260:1263:636:640

ANALYSIS OF ISOTOPIC RATIO OF IRON IN ANTARCTIC LICHENS, USNEA SPHACELATA AND UMBILICARIA APRINA (Twelfth Symposium on Polar Biology) ANALYSIS OF ISOTOPIC RATIO OF IRON IN ANTARCTIC LICHENS, USNEA SPHACELATA AND UMBILICARIA APRINA (Twelfth Symposium on Polar Biology) ナカムラ, アキラ イノウエ, マサカネ NAKAMURA, Akira INOUE, Masakane P(論文) For the purpose of getting information about the mechanism of uptake of iron by lichens, isotopic distribution of iron in two kinds of lichens, Umbilicaria aprina and Usnea sphacelata in the vicinity of Syowa Station, Antarctica, was studied. Lichen samples were tentatively separated into two categorical sites, active growing site and inactive site. As the first attempt, the isotopic ratio of 64Fe to 68Fe incorporated in the lichens was determined by neutron activation method and partly by ICP mass technique. The isotopic ratios (^<54>Fe/^<68>Fe) of the active growing site were significantly smaller than those of the inactive site or substratum for both lichens. An autonomous incorporation of iron with a kinetic isotope effect by these lichens can be considered. National Institute of Polar Research 1991-03 eng departmental bulletin paper https://doi.org/10.15094/00005125 https://nipr.repo.nii.ac.jp/records/5125 10.15094/00005125 AA10819561 Proceedings of the NIPR Symposium on Polar Biology 4 82 90 https://nipr.repo.nii.ac.jp/record/5125/files/KJ00000767501.pdf application/pdf 1.1 MB 1991-03-01