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比利时根特大学开发出一种当植物感染病毒时在病症出现以前就能预测发病的技术。 利用高分辨率红外视频摄像机观察植物的叶子等,对映像进行分析,并研究温度分布,探测到感染了病毒的部分的温度比其它部分高0.3℃～0.4℃。一旦感染了病毒等,生物防御物质—水杨酸就会蓄积在植物的这一部分。叶子的表面有一使水分蒸发、放热的小洞(气孔),水杨酸起关闭这种气孔的作用。不能把水分和热散发出来,导致叶子温度升高。
Ghent University in Belgium has developed a technique that predicts the onset of illness when it occurs when it infects a plant. Using a high-resolution infrared video camera to observe the leaves of plants, etc., the images were analyzed and the temperature distribution was studied. The temperature of the virus-infected part was detected to be 0.3 ° C to 0.4 ° C higher than that of other parts. Once infected with a virus, the biological defense substance, salicylic acid, accumulates in this part of the plant. The surface of the leaves has a small hole (pores) that evaporates and exudes water, and salicylic acid acts to close the pores. Do not emit moisture and heat, causing the leaf temperature to rise.