Non-invasive measurement of leaf water content and pressure–volume curves using terahertz radiation

Ran Li, Yaojie Lu, Jennifer M. R. Peters, Brendan Choat, Andrew J. Lee*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)
36 Downloads (Pure)


In this paper we describe a non-invasive method of measuring leaf water content using THz radiation and combine this with psychrometry for determination of leaf pressure–volume relationships. In contrast to prior investigations using THz radiation to measure plant water status, the reported method exploits the differential absorption characteristic of THz radiation at multiple frequencies within plant leaves to determine absolute water content in real-time. By combining the THz system with a psychrometer, pressure–volume curves were generated in a completely automated fashion for the determination of leaf tissue water relations parameters including water potential at turgor loss, osmotic potential at full turgor and the relative water content at the turgor loss point. This novel methodology provides for repeated, non-destructive measurement of leaf water content and greatly increased efficiency in generation of leaf PV curves by reducing user handling time.

Original languageEnglish
Article number21028
Pages (from-to)1-14
Number of pages14
JournalScientific Reports
Issue number1
Publication statusPublished - 3 Dec 2020

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Copyright © The Author(s) 2020. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.


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