Abstract: Applying re-humidification treatment to ultra-dried seed of stylosanthes guianenesis cv. Reyan No.5 before seed imbibition could mitigate damage to the seed biomembrance system during the imbibing process. Otherwise, the imbibition would deplete the seed vigour, more particularly, the vigour index. When the seed contains 3.17% moisture, the ultra-drying treatment preserves well the seed vigour, germination viability and percentage. The optimum seed moisture content should be higher than 3%, which increases the seed aging resistibility. A study of the eletrical conductivity, ions leakage, and dehydrogenase activity of the ultra-dried Stylosanthes seed reveals that a key factor guaranteeing the vigour of the ultra-dried seed is by re-humidification treatment, and a feasible measure to store the seed is by ultra-drying technique.

Key words: Stylosanthes guianenesis, Seed, Ultra-dried storage, Biomembrane

摘要： 超干处理的柱花草(Stylosanthes guianensis)种子直接吸胀会引起种子活力特别是活力指数下降.吸胀前回湿处理可以减轻吸胀过程所造成的损伤.在含水量不低于3.17%时,超干处理对种子的发芽势、发芽率、发芽指数和活力指数没有影响;其最适含水量不低于3%,超干种子的抗老化能力增强.对超干种子电导率、离子渗漏和脱氢酶活性研究结果表明,回湿处理是保证超干种子活力的关键因素,利用超干技术贮存柱花草种子是可行的.

关键词: 柱花草, 种子, 超干保存, 膜系统