化学药剂处理对蕹菜种子发芽的影响

Effects of Chemicals Agent on Seed Germination of Water Spinach

采用培养皿发芽法，研究了化学药剂处理对蕹菜种子发芽的影响。结果表明，GA3＋Ca^2＋混合液处理蕹菜种子，对促进种子发芽和提高种子活力表现加成作用，以50g／L GA3＋5mmol／L Ca^2＋处理较为适宜。蕹菜种子经稀盐酸预处理1h后，以100mg／L GA3浸种处理，可明显提高种子发芽势和活力指数，促进种子发芽。用30～50mmol／L的低浓度NaCl胁迫处理蕹菜种子，能提高种子发芽率，但随着NaCl胁迫浓度的增大，对发芽抑制作用明显增强。低浓度（0．05％～0．07％）ZnSO4浸种可促进种子发芽，高浓度（〉0．09％）则抑制种子发芽。

The effects of chemicals agent on seed germination of water spinach （Ipornoea aquatica Forsk. ）were studied by being cultured in cultured dishes. The results showed that the vigor of water spinach seeds was obviously enhanced by treating the seed with GA3 ＋Ca^2＋ mixed solution. The suitable concentration combination for GA3＋Ca^2＋ was 50 mg· L^-1 GA3 ＋5 mmol · L^-1 Ca^2＋. The vigor of germination and vigor index of water spinach were increased obviously by treating the seeds with 100 mg· L^-1 GA3 after having pretreated them with thin hydrochloric acid for 1 hour. The germination percentage was increased by treating the seeds with 30-50 mmol · L^-1 NaCl. With the increasing of NaCI concentration, the inhibition on germinating increased significantly. The seed germination was promoted by socking the seed with ZnSO4in low concentration （0.05% -0.07%）, and inhibited by that in high concentration （〉0.09%）.