渗透胁迫下玉米幼苗根系超弱光子辐射的变化与分析  

The change and analysis of ultra-weak photon emission in maize seedling root system under osmotic stress

作　　者：贺瑞瑞[1] 习岗[1] 刘锴[1] 赵燕燕[1] 

机构地区：[1]西安理工大学理学院,陕西西安710054

出　　处：《西安理工大学学报》2015年第4期454-459,共6页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(31471412;51277151);西安理工大学科技创新计划资助项目(2013CX019)

摘　　要：为了揭示渗透胁迫下玉米幼苗根系超弱光子辐射的生物学意义,研究了-0.1MPa的PEG-6000溶液形成的渗透胁迫下玉米幼苗根系自发光子辐射和外界光激发下的延迟光子辐射。结果表明,随着玉米幼苗的生长,根系自发光子辐射呈现出波动的趋势,渗透胁迫使波动的幅度减小,根系鲜重和自发光子辐射的变化呈现出明显的正相关。研究还发现,玉米幼苗根系的初始光子数I_0、衰减参数β和相干时间τ这几个延迟光子辐射动力学参数也都随着玉米幼苗根系的生长呈现出波动的变化趋势。机理分析表明,根系自发光子辐射可以作为根系细胞呼吸代谢强度的信号,初始光子数I_0的大小表征了根系细胞能态水平的高低,衰减参数β的变化反映了根系细胞中功能分子之间相互作用的变化。In order to reveal the biological significance of ultra-weak photon emission of maize seedling system under osmotic stress,the maize seedling system spontaneous photon emission formed under osmotic stress with-0.1MPa PEG-6000 solution and the delayed photon emission by the outside light exciting are studied.The results indicate that with the maize seedling growth,the root system spontaneous photon emission appears to be fluctuating trend,and osmotic stress can make the fluctuation amplitude reduced,and that the root system fresh weight appears to be in apparent positive correlation with the changes in spontaneous photon emission.It is found via researches that the initial photon number I_0,decay factorβ,and coherence timeτof the maize seedling system and several delayed biophoton emission dynamic parameters appear to have fluctuating change trend with the growth of maize seedling root system.The mechanism analysis indicates that spontaneous photon emission of seedling root can be a signal of cell respiration intensity,and the initial photon number I_0 might represent the cellular energy state level of root,the decay factorβcould reflect the change of interactions between functional molecules of root cells.

关 键 词：玉米 幼苗根系 渗透胁迫 光子辐射 细胞代谢 

分 类 号：Q632[生物学—生物物理学]