DYNAMIC ANALYSIS OF WATER-STRESS OF SUNFLOWER LEAVES BY MEANS OF A THERMAL IMAGE-PROCESSING SYSTEM
DYNAMIC ANALYSIS OF WATER-STRESS OF SUNFLOWER LEAVES BY MEANS OF A THERMAL IMAGE-PROCESSING SYSTEM
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DOI：
10.1104/pp.76.1.266
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发表时间：
1984-01-01
期刊：
影响因子：
7.4
通讯作者：
STRAIN, BR
中科院分区：
文献类型：
--
作者：
HASHIMOTO, Y;INO, T;STRAIN, BR
描述了一种使用波长为8-14μm的红外扫描温度计结合数字图像处理系统来测量完整叶子的所有区域的温度的方法。每 2 分钟从遭受日益增加的水分胁迫的向日葵（H. annuus L. cv. Large Russian）植物的叶子中获取的图片显示，水分亏缺首先出现在叶子边缘，伴随着气孔关闭和温度升高。最后，整个叶子的温度上升了3度-5度。 C 高于未受胁迫的叶子。当蒸腾作用恢复时，首先在叶缘进行蒸腾作用，并且这些叶缘不均匀地向内进行。叶子不同部位的温度和水分状况存在显着差异。这使得确定这种行为的原因并决定应该测量叶子的哪个部分的温度和水分状况变得很重要。热成像方法可用于监测遭受水、寒冷和其他胁迫的叶子中发生的短期温度变化。
A method for measuring the temperatures of all regions of an intact leaf by using an IR scanning thermometer at wavelengths of 8-14 .mu.m combined with a digital image processing system is described. Pictures obtained every 2 min from leaves of sunflower (H. annuus L. cv. Large Russian) plants subjected to increasing water stress showed that water deficit develops first at the margins of leaves, accompanied by stomatl closure and increase in temperature. Finally, the temperature of the entire leaf rises 3.degree.-5.degree. C above that of nonstressed leaves. When transpiration resumed, it did so first at the leaf margins and these proceeded nonuniformly inward. There are significant differences in the temperature and water status of different parts of a leaf. This makes it important to determine causes of such behavior and decide in what part of a leaf the temperature and water status should be measured. The thermo-imaging method can be useful in monitoring short term temperature changes occurring in leaves undergoing water, chilling and other stresses.