Carbon isotope discrimination (∆) was measured for leaves of Atriplex confertifolia along a salinity gradient in northern Utah. Over this gradient, the variation of ∆ values was high for a C4 species, and the ∆ values were positively correlated with salinity in both years of study. Of the possible explanations for this pattern, the ∆ results are consistent with the notion that salinity induces an increase in the bundle sheath leakiness of these C4 plants.
Sandquist, Darren R. and Ehleringer, James R.
"Carbon isotope discrimination in the C4 shrub Atriplex confertifolia along a salinity gradient,"
Great Basin Naturalist: Vol. 55
, Article 5.
Available at: http://scholarsarchive.byu.edu/gbn/vol55/iss2/5