【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。更多还原

【Abstract】 Seeds of Schima superba was soaked in polyethylene glycol(PEG6 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.更多还原