【摘要】 15％～35％PEG能提高苦瓜种子活力，但以25％PEG渗调效果最好，经25％PEG渗调4小时，发芽率、生长势和活力指数分别由对照的62．5、3．05和1．95提高到90．6、7．88和7．15。实验表明，PEG可明显提高苦瓜种子SOD和CAT的活性，并能抑制LOX的活性。经25％PEG处理后SOD和CAT的活性分别由对照的620、7，2提高到111．8和11．4，LOX活性由1．27降低到0．95。PEG渗调对恢复种子膜的完整性是明显的，25％PEG处理后，电导率由对照的143.5下降到79．4。更多还原

【Abstract】 The vigor of balsampear seeds could be raised by osmoconditioning with 15 % - 35 % concentration PEG, and the effect of 25% PEG was best. After soaking for 4 hours in 25% PEG solution, germination percentage, germination index and vigor index were in creased from 62. 5,5. 27, 1. 95 to 90. 6, 7. 3 and 7. 15 respectively. The result showed the activities of SOD and CAT were increased by osmoconditioning with PEG, and the activity of LOX was declined. After osmoconditioning with 25% PEG, the permeability of ecll membrance was improved and electral conductivity of the solution decreased.更多还原