Exploring the sensitivity of thermal imaging for Plasmopara viticola pathogen detection in grapevines under different water status

Functional Plant Biology : FPB
Manfred StollBeate Berkelmann-Loehnertz

Abstract

The effect on spatial variability of leaf temperature of inoculating grapevine leaves (Vitis vinifera L. cv. Riesling) with a fungal pathogen (Plasmopara viticola) was studied in either well irrigated or non-irrigated plants. The results from thermal imagery were compared with stomatal conductance measured by leaf gas exchange. The high sensitivity of leaf temperature to stomatal conductance means that infrared thermography can be used to monitor irregularities in temperature at an early stage of development after either infection or other stress-related changes affecting the amount of water transpired. Contrasting thermal effects due to the pathogen attack were found between measurements on well irrigated and water stressed plants. With irrigated vines, pathogen development caused an increase in leaf temperature at the point of infection. In contrast, under severe water stress, the inoculated plants showed a lower temperature at the sites of inoculation compared with the rest of the leaf. Analysis of the spatial and temporal sensitivity of the temperature profile, obtained from the deviation of individual pixels from the mean along a straight line, successfully distinguished between healthy and infected positions on the leaf i...Continue Reading

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Citations

Sep 15, 2016·Zeitschrift Für Naturforschung. C, a Journal of Biosciences·Matilde BarónMaría Luisa Pérez-Bueno
May 30, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Tan Jin YeongShirley Tang Gee Hoon

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