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Visualizing the Distribution of Elements Within Barley Leaves by Energy Dispersive X-Ray Image Maps (EDX Maps)
M. L. Williams, B. J. Thomas, J. F. Farrar and C. J. Pollock
The New Phytologist
Vol. 125, No. 2 (Oct., 1993), pp. 367-372
Stable URL: http://www.jstor.org/stable/2558224
Page Count: 6
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X-ray image maps of transverse sections of barley leaf blades were compared with individual X-ray emission spectra from vacuoles of barley leaf mesophyll, epidermis and parenchymatous bundle sheath cells. Both forms of X-ray analysis revealed distinct patterns in element distribution within the leaf blade. Calcium and Cl predominated within the epidermal cell vacuoles whilst P appeared mainly in the mesophyll cell layer. Apparent accumulation of S and Mg within the bundle sheath cell vacuoles is discussed in relation to xylem unloading and sulphur assimilation.
The New Phytologist © 1993 New Phytologist Trust