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石生茶藨种子萌发特性研究

Study on Germination Characteristics of Ribes saxatile Pall. Seeds

  • 摘要: 以西天山野果林石生茶藨当年生种子为试验材料,测定种子的外观形态特征、吸水特性和生活力,并研究不同层积方式、不同层积时间和不同质量浓度的GA3溶液对石生茶藨种子萌发特性的影响。结果表明,石生茶藨种子的平均纵径为2.33 mm,平均横径为1.52 mm,种子平均厚度为0.96 mm,平均千粒重为2.13 g,种子净度为91.09%。种子吸水48 h后达到饱和吸水率(80.22%)。经靛红染色法测定得知种子的生活力为85%。河沙层积处理效果优于裸层积处理和不层积处理,河沙层积40 d萌芽效果最好,为51.33%。GA3溶液处理可打破石生茶藨种子的休眠,提高石生茶藨种子的萌芽率,700 mg·L-1浓度处理下萌芽率最佳,为44.67%。综合可知,河沙层积和GA3处理相结合效果更佳,先河沙层积30 d,再使用700 mg·L-1的GA3溶液处理2 h效果最好,萌芽率为82.67%。

     

    Abstract: In this study, morphological characteristics, water-absorbing characteristics and viability of annual Ribes saxatile seeds which collected from wild fruit forest in western Tianshan were determined.And, the effects of different stratification modes, different stratification times and different concentrations of GA3 solution on the germination characteristics of R. saxatile seeds were also studied.The results showed that the mean longitudinal diameter and transverse diameter of the seeds were 2.33 mm, 1.52 mm, and the mean thickness of the seeds was 0.96 mm.The mean 1000-seed weight was 2.13 g and the seed purity was 91.09%. After 48 h of water absorption, the saturated water absorption rate reached 80.22%,while the seed viability determined by indigo staining was 85%.The effect of the treatment with river sediment stratification was better than that of the treatment with bare stratification and the treatment without stratification, and the effect of germination with river sediment stratification for 40 d was the best with 51.33% germination rate.The treatment with GA3 solution could break the dormancy of R. saxatile seeds and improved the germination rate of R. saxatile seeds.The germination rate of R. saxatile seeds under 700 mg·L-1 concentration was the best, which was 44.67%.In conclusion, the treatment with river sand stratification combined GA3 was better.The first sand stratification for 30 d and then the treatment with 700 mg·L-1 GA3 solution for 2 h had the best effect and the germination rate was 82.67%.

     

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