光照时间和赤霉素浓度对太白杜鹃种子萌发的影响

Influence of Different Light Time and GA_3 Concentration on Seed Germination of Rhododendron purdomii

以太白杜鹃种子为试材,研究了不同光照时间、不同浓度赤霉素(GA3)浸种处理对种子萌发的影响,以期为太白杜鹃的种质保存和开发利用提供科学依据。结果表明:光照时间对太白杜鹃的发芽时间和发芽率均没有明显的影响,但在24h全黑暗状态下,在GA3浓度低于800mg/L时,其发芽势要高于另外2种光照处理;用GA3对太白杜鹃种子进行24h浸泡后,可以显著提早太白杜鹃种子开始发芽时间,缩短种子萌发的时间,提高其发芽率和发芽势。

Taking Rhododendron purdomii seed as material, the effects of light time and gibberellin （GA3） on Rhododendron purdomii seeds germination were studied,in order to provid a scientific basis for germplasm preservation and utilization of Rhododendron purdomii. The results showed there was little difference among the three light time on the starting germination time,germination rate,hut under 800 mg/L GA3 conditions,the germination vigor of 24 h dark was much higher than the other two light treatments. After soaked 24 h with different concentration GA3, the starting germination time,germination rate and germination vigor were all dramatically enhanced.