激素处理对南方红豆杉种子萌发的影响
Effect of Hormone Treatment on Seed Germination of Taxus chinensis var.mairei
-
摘要: 以南方红豆杉种子为试验材料,利用L25(53)正交试验,采用GA3、6-BA和2,4-D激素,浓度梯度为0、0.25、0.5、0.75和1.0 mgL,测定种子的萌发率、发芽指数、活力指数和平均发芽时间,研究激素处理下对种子萌发的影响,探讨促进南方红豆杉种子萌发的有效激素浓度配比。试验结果表明,组合A1B2C2的萌发率最高,为85.33%;A1B1C1的发芽指数(6.95)和活力指数(19.25)最高;A4B2C5的平均发芽时间最短,为6.04 d。综合分析,GA3 0.75 mgL+6-BA 0.25 mgL对提高萌发率、缩短发芽时间效果最好;除平均发芽时间外,其他各指标的极差值均表现为GA3>6-BA>2,4-D,平均发芽时间的极差值排序为6-BA>GA3>2,4-D。GA3、6-BA对种子的萌发率分别有极显著影响(P<0.01)和显著影响(P<0.05),主效应为GA3>6-BA>2,4-D;GA3、6-BA对种子的发芽指数、活力指数和平均发芽时间均有极显著影响(P<0.01),主效应为GA3>6-BA>2,4-D;平均发芽时间的主效应为6-BA>GA3>2,4-D。由此可知,GA3是影响南方红豆杉种子萌发率、发芽指数及活力指数的关键因素,6-BA是促进南方红豆杉种子提早萌发的关键因素,2,4-D作用不明显。Abstract: In order to study effect of hormone treatment on seed germination and discuss effective hormone concentration ratio of promoting seed germination of Taxus chinensis var.mairei,taking Taxus chinensis var.mairei seeds as experiment material,using orthogonal test design of L25(53),choosing three hormones GA3,6-BA and 2,4-D,concentration gradient of 0,0.25,0.5,0.75 and 1.0 mgL,seed germination rate,germination index,vigor index and mean germination time were measured.Test results showed that germination rate of A1B2C2 was the highest,which was 85.33%.Germination index(6.95)and vigor index(19.25)of A1B1C1 were the highest.Average germination time of A4B2C5 was the shortest,which was 6.04 d.Comprehensive analysis,GA3 0.75 mgL+6-BA 0.25 mgL had the best effect on improving germination rate and shortening germination time.In addition to average germination time,extreme values of other indexes were GA3>6-BA>2,4-D,extreme values of mean germination time were 6-BA>GA3>2,4-D.GA3 and 6-BA had extremely significant effect(P<0.01)and significant effect(P<0.05)on seed germination rate,main effect was GA3>6-BA>2,4-D.GA3 and 6-BA had extremely significant effect(P<0.01)on seed germination index,vigor index and mean germination time,main effect was GA3>6-BA>2,4-D.Main effect of mean germination time was 6-BA>GA3>2,4-D.Therefore,GA3 was the key factor affecting seed germination rate,germination index and vigor index of Taxus chinensis var.mairei.6-BA was the key factor to promote seed germination of Taxus chinensis var.mairei.Effect of 2,4-D was not obvious.
-
Keywords:
- Taxus chinensis var.mairei /
- Hormone /
- Seed germination /
- Orthogonal test
计量
- 文章访问数: 325
- HTML全文浏览量: 0
- PDF下载量: 179
- 被引次数: 0