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西安理工大学 应用物理系
收稿:2009-10-30,
修回:2010-1-20,
网络首发:2010-11-22,
纸质出版:2010-11-22
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习岗, 李少华, 张艳. H<sub>2</sub>O<sub>2</sub>胁迫下菠菜叶片延迟发光动力学过程的分析[J]. 发光学报, 2010,31(6): 952-956
XI Gang, LI Shao-hua, ZHANG Yan. Analysis of Delayed Luminescence Dynamic Processes of Spinach Leaves Stressed by H<sub>2</sub>O<sub>2</sub>[J]. Chinese Journal of Luminescence, 2010,31(6): 952-956
从生物延迟发光的机理出发
建立了生物延迟发光动力学方程
发现菠菜叶片的延迟发光随时间按双指数规律衰减
表明菠菜叶片延迟发光来源于快项和慢项两个发光系统
其动力学行为可以通过发光动力学参数积分强度、初始光子数和衰变时间定量描述。用体积分数为10%的H
2
O
2
溶液处理菠菜叶片
随着处理时间的延长
延迟发光积分强度和初始光子数快速降低
积分强度和初始光子数的变化呈正相关
表征快相和慢相发光特征的两个衰变时间表现出逐渐减小的趋势。积分强度和初始光子数的变化代表了叶片的光合能力和代谢强度的下降
衰变时间的变化暗示H
2
O
2
可能对叶片PSⅡ中D1和D2两条多肽造成了破坏。
paper
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