摘要
为了解水分胁迫对亚麻种子萌发的影响以及为亚麻抗旱栽培技术和育种方法提供理论依据,以亚麻076、075、陇亚8号的种子为试验材料,分别用不同质量分数(0%、10%、15%、20%、25%、30%)的聚乙二醇(PEG-6000)处理,研究水分胁迫对亚麻种子的萌发的影响。结果显示:随着PEG质量分数的增加,亚麻种子的发芽势、发芽率下降,其中陇亚8号下降幅度最大。亚麻种子在PEG质量分数增加时,电导率呈现了低高低的趋势,其中076的电导率的变化较明显。适宜质量分数的PEG胁迫可以提高种子的活力指数,而较高质量分数的PEG则降低种子的活力指数。试验可知,这3个品种的种子在抗旱性上有明显的差异,076抗旱性强,075较抗旱,陇亚8号不抗旱。
To understand the effect of drought stress on seed germination of flax and supply some a theory basis for flax drought stress breeding,6 concentrations of PEG-6000（0%,10%,15%,20%,25%,30%） were used to stress three flax lines or varieties during seed germination periods and seed germination rate,germination energy and conductance were investigated.The results showed that seed germination rates and germination energies of flax were gradually decreased with the increase of PEG concentration,and the cultivar Longya No.8 decreased more than the other two lines.Results of conductance indicated some tendencies of low-high-low with the increase of PEG concentrations,some degree of PEG had some effect on vitality improvement of flax seed,however higher degree of PEG could decrease the flax seed vitality.There were major differences on drought resistance for three flax cultivars,and line 076 have a better ability to resist drought stress,but variety Longya No.8 shows less ability to resist it.
出处
《石河子大学学报（自然科学版）》
CAS
2011年第1期79-82,共4页
Journal of Shihezi University(Natural Science)
关键词
水分胁迫
亚麻种子
萌发
water stress
flax seed
germination
