植物叶片延迟发光的光谱特性

Spectral Feature of Delayed Luminescence of Plant Leaf

采用生物超微弱发光探测技术,对绿宝石喜林芋成熟叶片在特定波长下的延迟发光特性进行了测量和分析,得到在400 nm^640 nm波长范围内其延迟发光衰减参数"1/P"随波长变化的光谱特性。实验结果表明:叶片在各个特定波长下"1/P光谱"特性不同;植物叶片延迟发光主要集中在大于500 nm的长波波段,在这个波段内延迟发光强度最大;衰减参数1/P随波长的增加而上升,当波长大于500 nm时,衰减参数1/P相对稳定,在这个波段条件下衰减参数1/P最大。

Using ultra-weak photon emission detective technique, the delayed luminescence （DL） of plant leaf at different wave-length were detected and analyzed. Within the scope of the 400 nm - 640 nm spectrum, we gained the change of delayed luminescence attenuation parameter （l/P） of plant leaf at different wave-length, which was regarded as ＂the 1/P spectrum＂. The result shows that： the characteristic of ＂the 1/P spectrum＂ of plant leaf was dissimilar at different wave-length. The intensity of the delayed luminescence ascends with the wave-length increasing. However, when the wave-length exceeds 500 nm, the intensity of DL remains stable; the I/P parameter of plant leaf also ascend with the increasing of the wave-length, but when the wave-length exceeds 500 nm, the I/P parameter of remain opposite stability, whose its change is very small within the wide range of the wave-length. The rule of ＂the 1/P spectrum＂ reflected the interior interaction of plant leaf at different excitation states.