药沙引发对超甜玉米种子活力及其生理变化的影响

Effect of Chemical-sand Priming on Seed Vigor of Super Sweet Corn and Their Physiological Changes

本文对改善超甜玉米种子活力的方法进行了探索。结果表明,沙引发结合4种药剂处理均可显著提高超甜玉米“绿色超人”种子活力;处理后种子电解质渗漏均明显降低,尤以沙引发+核黄素处理的种子电解质渗漏最慢,且幼苗CAT和SOD活性均得到显著提高,并延缓了它们在低温胁迫下的降解速度。在此基础上用沙引发+核黄素处理其他7种超甜玉米种子,其出苗率、出苗速度、膜系统完整性或SOD活性等指标在不同品种上也得到显著提高。

Effect of seed priming combined with chemical treatment on improving seed vigor of super sweet corn （ Zea mays L. saccharata Sturt ） was investigated. Results showed that seed vigor of super sweet corn ＂ Green Superman＂ was significantly enhanced by all four methods. The electrolyte leakage of seeds treated by sand priming plus chemical was significantly decreased and the slowest electrolyte leakage was observed in the seeds treated by sand priming plus riboflavin. And the CAT and SOD activities of seedlings treated were significantly increased and their degradation was alleviated in low temperature stress. On this basis, further research was done on effect of sand priming plus riboflavin on seed vigor of other seven super sweet corns. Results suggested that their percentage of seedling emergence, speed of seedling emergence, membrane system integrality or SOD activity was significantly improved.