摘要
采用聚乙二醇(PEG)模拟水分胁迫对木荷种子萌发的影响,结果表明:无论是水培还是沙培、避光还是光照下,木荷种子萌发率、幼苗高度都是随PEG浓度的增加而降低,都在PEG浓度为20%时达到最低;幼苗的相对含水量没有随PEG浓度的增加依次递减;水培自然光照下的萌发率>沙培恢复光照的萌发率>沙培避光的萌发率。由此说明避光能抑制木荷种子萌发,特别是在干旱、避光的情况下木荷种子受抑制更明显。
Seeds of Schirna superba was soaked in polyethylene glycol （PEG-6 000）. The main results showed that： the sprout length and germination of S, superba decreased with the increase of PEG-6 000 concentration on all trials; it reached the lowest at 20 % PEG-6 000 concentration. The sprout water content did not decrease step by step with increase of PEG-6 000 concentration. The sequence of germination ratio in PEG-6 000 concentration was： in water under natural light 〉 in sand under comeback light in sand under dark. S, superba seed germination was inhibited under dark, and was inhibited remarkably under drought stress and dark. The light and water were significant inhibitory factors for Schima superba seeds.
出处
《福建林业科技》
北大核心
2007年第4期1-3,共3页
Journal of Fujian Forestry Science and Technology
基金
国家自然科学基金项目(30370275)
福建省自然科学基金项目(C0310004)
福建省青年科技创新基金项目(2001J051)
关键词
水分胁迫
木荷
种子萌发
water stress
Schima superba
seed germination
