Remote monitoring tschnique of plant activity using laser-induced fluorescence lifetime measrement method

为了更好地了解植物的生理活性，我们开发了一种激光诱导荧光寿命（LIFL）监测系统。利用该系统测定了几种植物叶片的荧光寿命。在水分胁迫条件下生长的红罗宾叶片的荧光寿命比对照叶片延长。对照和盐胁迫条件下的生菜叶片寿命无显著差异。梧桐树叶片在阳光照射处的荧光寿命比遮荫处的长，且在太阳辐射高的13:00处荧光寿命最小。实验结果证实，植物叶片的荧光寿命是了解植物生理活动的一个很好的指标，所开发的LIFL监测系统是实现这一目的的有力工具。

We have developed a laser-induced fluorescence lifetime (LIFL) monitoring system for getting better understandings of plant's physiological activity. Using this system, fluorescence lifetime measurement of several plant leaves was made. Leaves of RedRobin grown in water-stress condition showed that the fluorescence lifetime was lengthen comparing with that of control leaves. There was no difference of lifetime between lettuce leaves grown in control and salt stress condition. Fluorescence lifetime of plane tree leaves at sunny place was longer than that at shade place, and the lifetime was minimum at 13:00 when the solar radiation was high.Experiment results confirmed that fluorescence lifetime of plant leaves was a good index to understand plant's physiological activity, and the developed LIFL monitoring system was a powerful apparatus for this purpose.