PSY1 Psychrometer: a field instrument for measuring in-situ plant water potential

The ICT International PSY1 Psychrometer is used in recent research to elucidate plant responses to drought and related stresses. Most notable in this research is the characterisation of the occurrence of xylem embolism, the phenomenon where xylem vessels get blocked by air bubbles or cavities. Psychrometer measurements normally accompany other approaches like the optical technique and these investigations are normally done in the laboratory.

In more recent times, physiological responses of plants are determined in the field or in the growth chambers using the PSY1 Psychrometer. ICT International recommends readers to look at the following recent journal articles. The first article used PSY1 on soybean grown in growth chambers. Haverroth et al (2024) used Leaf Psychrometers to reveal how waterlogging impairs water transport in leaves and stems of soybean. The second article used PSY1 on junipers growing naturally in a woodland. In this paper, Guo et al (2024) demonstrated how modelling gross primary productivity (GPP) can be enhanced by incorporating plant hydraulics (by measuring plant water potential) in a pinyon-juniper woodland.

Details of the PSY1 Psychrometer can be found here.

The full list of publications that use the PSY1 Psychrometer can be found here.

References

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Guo, J. S., Barnes, M. L., Smith, W. K., Anderegg, W. R. L., & Kannenberg, S. A. (2024). Dynamic regulation of water potential in Juniperus osteosperma mediates ecosystem carbon fluxes. New Phytologist, n/a(n/a). https://doi.org/10.1111/nph.19805

Haverroth, E. J., Da-Silva, C. J., Taggart, M., Oliveira, L. A., & Cardoso, A. A. (2024). Shoot hydraulic impairments induced by root waterlogging: parallels and contrasts with drought. Plant Physiology, kiae336. https://doi.org/10.1093/plphys/kiae336

Ben

An Experienced Application Scientist with a demonstrated history of working in the research industry. Broad knowledge in soil-plant and atmosphere continuum. Skilled in plant physiological instrumentation including sap flow, transpiration and photosynthesis, Spatial Analysis, Water Quality, Spectroscopy, and Lecturing. Strong research professional with a Doctor of Philosophy (Ph.D.) focused in Soil Science from University of Adelaide.

PSY1 Psychrometer: a field instrument for measuring in-situ plant water potential

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