Effect of Different Time of Salt Stress on Delayed Luminescence(DL) from Lotus Leaves

Delayed luminescence of bioluminescence is the important content optic-biology in biophysics. Since 1923,a lot of research has been carried out .This paper choose the lotus leaf as the test materials to experiment. The curve of delayed luminscence with different treating time on different concentrations of NaCL,the changing curve of initial intensity of delayed luminscence with different treating time and the changing curve of attenuation parameters of delayed luminscence with different treating time have been researched by BPCL. The results indicate that with the stress time increasing, the initial strength and attenuation parameters of DL of 0%, 0.01% and 0.1% treatment firstly increased and then decreased ; the initial strength and attenuation parameters of DL of 1% and 5% treatment decreased all along; the initial strength and attenuation parameters of DL of 10% and 20% treatment decreased to a low-level from the jump; on the whole, 0.1% treatment had the lowest effect on the initial strength and attenuation parameters of DL. The experiments showed that the DL can reflect the level of injury of salt stress on leaves. The conclusions of the biophysical methods for measuring the outside world the impact of stress on the blades to provide a certain reference value.