Evaluation of leaf water status by means of permittivity at terahertz frequencies
AUTOR(ES)
Jördens, C.
FONTE
Springer Netherlands
RESUMO
We present an electromagnetic model of plant leaves which describes their permittivity at terahertz frequencies. The complex permittivity is investigated as a function of the water content of the leaf. Our measurements on coffee leaves (Coffea arabica L.) demonstrate that the dielectric material parameters can be employed to determine the leaf water status and, therefore, to monitor drought stress in plant leaves. The electromagnetic model consists of an effective medium theory, which is implemented by a third order extension of the Landau, Lifshitz, Looyenga model. The influence of scattering becomes important at higher frequencies and is modeled by a Rayleigh roughness factor.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=2710460Documentos Relacionados
- Copper Cobalt Magnetic Ceramic Materials Characterization at Terahertz Frequencies
- Maintenance of Photosynthesis at Low Leaf Water Potential in Wheat 1: Role of Potassium Status and Irrigation History
- Dielectric Relaxation Dynamics of Water in Model Membranes Probed by Terahertz Spectroscopy
- Comparison of Pressure Chamber and Thermocouple Psychrometer Determinations of Leaf Water Status in Tomato
- Complex permeability and permittivity variation of radar absorbing materials based on MnZn ferrite in microwave frequencies
