假槟榔种子催芽技术和脱水耐性的研究

Technology of accelerating germination and desiccation tolerance in Archontophoenix alexandrae seeds

关键词:  假槟榔  种子  催芽  脱水耐性

Key words:  Archontophoenix alexandrae  seed  accelerating germination  desiccation tolerance

摘要:

为提高假槟榔的人工种植技术,对其种子做了不同的化学催芽处理,以寻求种子的有效催芽方法,并对种子脱水耐性进行了探讨。结果表明:20%过氧化氢和98%浓硫酸浸泡5 min,0.3%亚硝酸钠和0.2%硝酸钾溶液浸种24 h后,发芽率显著升高,速度显著加快,尤以浓硫酸和硝酸钾处理效果为好; 200～1 000 mg/L赤霉素和20～100 mg/L激动素溶液浸泡24 h也显著促进种子萌发,但催芽效果与溶液浓度有关。成熟种子轻度脱水,发芽率有所上升,但含水量下降至17%以下,发芽率急剧下降,当含水量下降10%以下,发芽力完全丧失。由此可见,种子很可能是中间型种子。

Abstract:

In order to improve the artificial planting technology of Archontophoenix alexandrae,different chemical treatments to accelerate seed germination were carried out to seek efficient methods of accelerating germination, the seed desiccation tolerance were also investigated in this study. The results showed that soaking in solutions of 20% H₂O₂ and 98% H₂SO₄ for 5 min,0.3% NaNO₂ and KNO₃ for 24h all could improve germination percentage and velocity,especially in 98% H₂SO₄ and 0.3% NaNO₂ solution. Soaking in 200～1 000 mg/L GA and 20～100 mg/L KT solution for 24 h could also accelerate germination,but the efficiency of accelerating was related to the concentration of solutions. The germination percentage of mature seeds increaced slightly after slight desiccation,but decreased significantly when the seed moisture content reduced to below 17% and then fully lost when below 10%,so the seeds tend to be intermediate.