Figure 2.

Terahertz transmission as a function of dehydration. Leaves were dehydrated to a range of leaf water potentials from full turgor to turgor loss point and beyond. At each measurement point for Hedera canariensis and Platanus racemosa, transmission of terahertz radiation through the leaf between major veins was characterized at 1‐mm steps. Depicted above are sequential images produced for a H. canariensis leaf at leaf water potential values of −0.28 to −2.10 MPa, illustrating an increase in the transmitted radiation with dehydration