Terahertz time domain spectroscopy allows contactless monitoring of grapevine water status
Acceso abierto / Sarbide irekia
Artículo / Artikulua
Versión publicada / Argitaratu den bertsioa
Agriculture is the sector with the greatest water consumption, since food production is frequently based on crop irrigation. Proper irrigation management requires reliable information on plant water status, but all the plant-based methods to determine it suffer from several inconveniences, mainly caused by the necessity of destructive sampling or of alteration of the plant organ due to contact in ... [++]
Agriculture is the sector with the greatest water consumption, since food production is frequently based on crop irrigation. Proper irrigation management requires reliable information on plant water status, but all the plant-based methods to determine it suffer from several inconveniences, mainly caused by the necessity of destructive sampling or of alteration of the plant organ due to contact installation. The aim of this work is to test if terahertz (THz) time domain reflectance measurements made on the grapevine trunk allows contactless monitoring of plant status. The experiments were performed on a potted 14-years-old plant, using a general purpose THz emitter receiver head. Trunk THz time-domain reflection signal proved to be very sensitive to changes in plant water availability, as its pattern follows the trend of soil water content and trunk growth variations. Therefore, it could be used to contactless monitor plant water status. Apart from that, THz reflection signal was observed to respond to light conditions which, according to a specifically designed girdling experiment, was caused by changes in the phloem. This latter results opens a promising field of research for contactless monitoring of phloem activity. [--]
Frontiers in Plant Science, 6: 404
Universidad Pública de Navarra. Departamento de Producción Agraria / Nafarroako Unibertsitate Publikoa. Nekazaritza Ekoizpena Saila / Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica y Electrónica / Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektriko eta Elektronikoa Saila
This research was supported by the Industry Department of the Government of Navarre (VITICS, Ref: IIM14244.RI1, project co-financed with EU funds from the ERDF) and by the Spanish Ministry of Economy and Competitiveness (BACAVID, Ref: AGL2011-30408-C04-03 and DIDAcTIc, Ref: TEC2013–47753-C3-1-R).
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