AI Article Synopsis
- The study examines the foliar sulfur isotope values (δ(34)S) of three plant species to assess their relationship with atmospheric sulfur.
- The average δ(34)S values of the plants were similar to those found in soil and rainwater sulfate, suggesting minimal isotopic changes during sulfur uptake.
- The plane and osmanthus trees displayed consistent δ(34)S values from mature to senescing leaves, indicating efficient sulfur redistribution, while the camphor tree’s values were less reliable for tracking atmospheric sulfur.
Article Abstract
Foliar δ(34)S values of three soil-growing plant species (Platanus Orientalis L., Osmanthus fragrans L. and Cinnamomum camphora) have been analyzed to indicate atmospheric sulfur. The foliar δ(34)S values of the three plant species averaged -3.11±1.94‰, similar to those of both soil sulfur (-3.73±1.04‰) and rainwater sulfate (-3.07±2.74‰). This may indicate that little isotopic fractionation had taken place in the process of sulfur uptake by root or leaves. The δ(34)S values changed little in the transition from mature leaves to old/senescing leaves for both the plane tree and the osmanthus tree, suggestive of little isotope effect during sulfur redistribution in plant tissues. Significantly linear correlation between δ(34)S values of leaves and rainwater sulfate for the plane and osmanthus trees allowed the tracing of temporal variations of atmospheric sulfur by means of foliar sulfur isotope, while foliage δ(34)S values of the camphor is not an effective indicator of atmospheric sulfur.
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| http://dx.doi.org/10.1016/j.envpol.2011.11.006 | DOI Listing |
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