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Publication Type J
Authors Walker, C. D. and R. Sinclair
Title SOIL-SALINITY IS CORRELATED WITH A DECLINE IN C-13 DISCRIMINATION IN LEAVES OF ATRIPLEX SPECIES
Source Australian Journal of Ecology
Author Keywords carbon isotope discrimination affecting c-13/c-12 ratios inland halophytes plants
Abstract A dune-swale-dune transect in north-eastern South Australia with a regular covering of saltbush (Atriplex vesicaria and Atriplex stipitata) was studied. The transect topography was surveyed, as were the DELTA (discrimination against C-13 in CO2) of the saltbush plants, and the electrical conductivity and chloride profiles of the soil. Increasing soil salinity, surveyed as electromagnetic (EM) soil conductivity, correlated with a decrease in DELTA-composition in the leaves of the C4 Atriplex species. No such correlation occurred with the whole plant. Further, the DELTA of foliage was more variable than the DELTA of whole plants. The DELTA of foliage was higher than that of corresponding stems. We suggest that soil conductivity measured in this way is a meaningful assessment of plant growth conditions, and that further study will demonstrate its scope for incorporation into field studies of native plants at a quantitative level.
Author Address UNIV ADELAIDE,DEPT BOT,ADELAIDE,SA 5001,AUSTRALIA CTR RES GROUNDWATER PROC,GLEN OSMOND,SA 5064,AUSTRALIA WALKER, CD (reprint author), CSIRO,DIV WATER RESOURCES,PMB 2,GLEN OSMOND,SA 5064,AUSTRALIA, AUSTRALIA
ISSN 0307-692X
ISBN 0307-692X
29-Character Source Abbreviation Aust. J. Ecol.
Publication Date Mar
Year Published 1992
Volume 17
Issue 1
Beginning Page 83-88
Digital Object Identifier (DOI) 10.1111/j.1442-9993.1992.tb00783.x
Unique Article Identifier WOS:A1992HL05500010
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