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Translocation of 15N indicates nitrogen recycling in the mat-forming lichen Cladonia portentosa.

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Ellis, Christopher J, Crittenden, Peter D, Scrimgeour, Charles M, and Ashcroft, C J, Translocation of 15N indicates nitrogen recycling in the mat-forming lichen Cladonia portentosa.: .

Summary

Nitrogen translocation was measured in Cladonia portentosa during 2 yr growth in Scottish heathland. Translocation was predicted to occur if N is resorbed from senescent basal tissue and recycled within the thallus. (15)N was introduced into either the lower (TU thalli) or upper (TD thalli) 25 mm of 50-mm-long thalli as (15)N-NH(4) (+), (15)N-NO(3) (-) or (15)N-glycine. Labelled thalli were placed within intact lichen cushions, either upright (TU) or inverted (TD). Vertical distribution of label was quantified immediately following labelling and after 1 and 2 yr. Independently of the form of introduced label, (15)N migrated upwards in TU thalli, with new growth being a strong sink. Sink regions for (15)N during year 1 (including new [...]

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  • Upper Colorado River Basin

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From Source - Mendeley RIS Export <br> On - Wed Sep 19 08:08:31 MDT 2012

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Title Citation Translocation of 15N indicates nitrogen recycling in the mat-forming lichen Cladonia portentosa.

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