Research on the ultra-weak luminescence of maize seeds
ABSTRACT:
The ultra-weak luminescence (UWL) feature of plant seeds is
investigated. Before UWL measurement, the maize seeds are moistened in
distilled water for various periods, which are 2h, 4h, 6h and 8h. And then the
seeds are dried to the mass they had before moistened. The UWL measurements are
made before and after distilled water injects into measured samples. A kind of
double exponential function is proved fitting the tested data well as the
coefficient of determination of fitting is above 0.97. It is observed that UWL
properties of different samples have obvious regularities. The dry seeds
contain a large number of hydrophilic pores, so water quickly permeates into
maize seeds and forces the seeds to produce stress UWL after water injection.
The intensity of UWL depends on the structure of seeds and the time of
moistening. Over a period of time, the different UWL intensity of samples
decays to the same level as the seeds without moistening. The study results
contribute to the understanding of relationships between the structure of seeds
and metabolic activity and its UWL specialties. The paper provides a new idea
for nondestructive testing of plant seeds.
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