不同处理方法对樟叶越桔种子萌发的影响

为了提高樟叶越桔种子的萌发率,以在六盘水采集的樟叶越桔种子为材料,对其进行种子萌发试验,研究了不同水浴温度浸种(常温、40℃和60℃)、不同浓度赤霉素(GA_3)溶液浸种(200、1000、1500 mg/L)、不同浓度硼酸溶液浸种(0.2%和0.5%)和不同培养温度(15、20、25、30、35℃)等处理对樟叶越桔种子萌发的影响。结果表明:常温水浴浸种与40℃水浴浸种条件下种子萌发率差异不显著,60℃水浴温度过高,浸种后的种子丧失生命活力;GA_3浸种处理能显著促进种子萌发,缩短发芽时间,且萌发率随浓度增加而增加,最大萌发率达68.67%,而硼酸浸种无明显作用;不同培养温度条件下的萌发率差异显著,在15~30℃条件下,种子都能发芽,但萌发适宜温度为15~25℃,最适温度为20℃,最大萌发率达65.33%。

Effect of Different Treatments on the Seed Germination of Vaccinium Dunalianum

Seeds of Vaccinium dunalianum collected from Liupanshui, Guizhou province were chosen as the germination test materials.Seeds were treated in different soaks such as different temperature (room temperature, 40 ℃ and 60 ℃), different concentrations of GA3 (200, 1000 and 1500mg/L), different concentrations of H3BO3 (0.2% and 0.5%) and different constant culture temperatures (15、20、25、30、35℃).The results showed that germination percentage was not significant different in the room temperature and 40 ℃ water bath soaking conditions.However, the temperature of the water bath at 60 ℃ was too high, and the seed after soaking had lost its vitality.The seeds treated with GA3 had significantly higher final germination percentage and shortened germination time;and their germination percentage increased along with the increase of concentrations, reaching a maximum of 68.67%.H3BO3 treatments did not have effect on seed germination.The difference of germination percentage at different culture temperatures was significant.Seeds of V.dunalianum could germinate in a wide range of temperature from 15℃ to 30℃.The suitable temperatures for their germination were 15℃ to 25℃, and the optimum temperature was 20℃ with the maximum germination percentage of 65.33%.