Journal Article

Influence of ectomycorrhization and cesium/potassium ratio on uptake and localization of cesium in Norway spruce seedlings

Ivano Brunner, Beat Frey and Thomas K. Riesen

in Tree Physiology

Volume 16, issue 8, pages 705-711
Published in print August 1996 | ISSN: 0829-318X
e-ISSN: 1758-4469 | DOI: http://dx.doi.org/10.1093/treephys/16.8.705
Influence of ectomycorrhization and cesium/potassium ratio on uptake and localization of cesium in Norway spruce seedlings

More Like This

Show all results sharing this subject:

  • Plant Sciences and Forestry

GO

Show Summary Details

Preview

Norway spruce (Picea abies (L.) Karst.) seedlings growing in a growth pouch system were used to investigate the effects of the ectomycorrhizal fungus Hebeloma crustuliniforme (Bull. ex St. Amans) Quél. and various Cs/K ratios on the uptake of 134Cs, expressed as a percentage of the total amount of 134Cs supplied. The amount of 134Cs taken up by seedlings increased with increasing Cs/K ratio. At a Cs/K ratio of 0.1, uptake of 134Cs ranged between 7.2 and 7.3% and was independent of ectomycorrhizal status, whereas at Cs/K ratios ≥ 1 uptake of 134Cs varied from 8.1 to 11.1% for ectomycorrhizal and from 10.4 to 14.4% for non-inoculated plants. Ectomycorrhizal seedlings contained a lower concentration of 134Cs than non-inoculated seedlings. Among plant parts, the amount of 134Cs was significantly lower in needles and lateral roots of ectomycorrhizal seedlings compared with non-inoculated seedlings. Among fungal and seedling tissues, highest X-ray net counts of 133Cs were measured in fungal hyphae of ectomycorrhizal mantles. X-Ray net counts of 133Cs in lateral roots of ectomycorrhizal and non-inoculated plants were similar, but 5 to 10 times higher than in main roots and needles, suggesting an accumulation of 133Cs in lateral roots and slow translocation to other plant parts. In contrast, X-ray net counts of K indicated that K was readily mobilized from lateral roots to main roots and needles. Elemental mapping showed a relatively homogeneous distribution of 133Cs within the root.

Keywords: gamma spectrometry; growth pouch; Hebeloma crustuliniforme; low-temperature scanning electron microscopy; Picea abies; X-ray microanalysis

Journal Article.  0 words. 

Subjects: Plant Sciences and Forestry

Full text: subscription required

How to subscribe Recommend to my Librarian

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.