玉米种子人工老化过程中超弱发光与生理代谢的关系

以玉米品种“郑单958”种子为材料,研究了种子人工老化过程中超弱发光(ultraweak luminescence,UWL)的变化及其与种子活力、相对电导率、ATP含量的关系.结果表明,随着老化时间的延长,种子的发芽率、发芽势和发芽指数、UWL强度、ATP含量均逐渐下降,相对电导率逐渐升高;UWL强度与发芽率、发芽势、发芽指数和ATP含量显著正相关,与相对电导率显著负相关.表明,UWL与以ATP含量为标志的能量水平密切相关;UWL作为一种无损、灵敏、快速的物理检测指标,可应用于种子活力无损检测研究.

Relationship of Ultraweak Luminescence Intensity with Physiological Metabolism of Maize Seeds during Artificial Aging

The seeds of maize (Zea mays L.) variety Zhengdan 958 were used to study the change of ultraweak luminescence (UWL) intensity and its relationship with seed vigor,relative electric conductivity and ATP content during artificial aging.The results indicated that the germination percentage,germination potential,germination index,UWL intensity and ATP content decreased gradually,while the relative electric conductivity increased with the prolongation of artificial aging.The correlation analysis showed that UWL intensity was significantly positively correlated with germination percentage,germination potential,germination index and ATP content,while significantly negatively correlated with relative electric conductivity.It was concluded that UWL was closely related to the energy level symbolized by ATP content,and as a fast nondestructive physical indicator with better sensitivity,it could be applied into the study of seed vigor nondestructive testing.