摘要
以不同渗透势的PEG(6000)溶液模拟干旱胁迫条件,研究亚麻种子的萌发、幼苗生长和电导率对干旱胁迫的响应。结果表明,适宜浓度的PEG对亚麻种子的发芽率和发芽势并没有显著影响,但可以促进种子的萌发,加快种子的发芽速度,同时可以提高种子的发芽指数和活力指数。当PEG浓度达到30%时,仍有50%以上的种子能萌发,但随着胁迫时间的增加,亚麻种子的发芽率、发芽势、发芽指数和活力指数呈现明显下降的趋势。而不同程度的PEG胁迫,使得电解质外渗率均小于对照。从实验中可以看出,亚麻种子萌发可以忍耐的最大渗透势为-0.8MPa,说明亚麻具有一定的适应干旱能力。
We study the sprouting of seed, seeding growth and conductance. The results showed that the condign drought stress cant evident effect sprouting rate and sprouting potential of seed, hut may accelerate sprouting speed of seed, They also can augment sprouting and vigor index. Hyper -50percentage sprouting rate of seed fewer than 30% a PEG level of stress. However, sprouting rate and potential, sprouting and vigor index are falling as the osmotic stress aggravated. Nevertheless, the different degree stress of PEG make the rate of exosmosis is under the contrast. The results showed that the maximal infiltration the sprouting of seed could endure is - 0.8MPa. It suggested that the flax seed could endure certain degree of drought stress.
出处
《防护林科技》
2006年第5期27-29,共3页
Protection Forest Science and Technology
基金
黑龙江省自然科学基金项目(C0328)
