Effects of Temperature, Light Intensity and PEG Stress on Seed Germination of Asparagus oligoclonos
Asparagus oligoclonos seeds collected from arid grassland habitats in Daqing were used as test materials. The effects of temperature, light intensity, and water stress induced by polyethylene glycol (PEG-6000) on seed germination of A. oligoclonos were studied in order to provide a scientific basis for the technical process of high quality seedling cultivation from .4. oligoclonos seeds. Results show that the seeds of A, oligoclonos could germinate at 15-30 degrees C, indicating that the seed germination of A. oligoclonos has a wide range of adaptations to temperature. The most suitable temperature for seed germination is 25 degrees C. There is a significant difference in seed germination between dark conditions (92.78%) and light conditions (59.45%), which indicates that dark conditions are more suitable for seed germination. The germination rate, germination index, rigor index of .4. oligoclonos seeds exhibited downward trends with increasing PEG-6000 concentration during germination. However, the germination rates ranged from 22.78% to 51. 11% even under 5% -10% PEG-6000. The germination of A. oligoclonos seeds has a certain resistance to drought during germination.
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