新疆猪牙花种子生物学特性研究

目的]对新疆猪牙花种子生物学特性进行研究,为新疆猪牙花驯化引种提供科学依据.方法]对新疆猪牙花果实和种子的基本形态和解部特征进行研究；并对种子千粒重、含水量、种子生活力和发芽率以及种皮透性等进行测定.结果]新疆猪牙花果实为蒴果,具3棱,鲜果粒横径11.0～35.0 mm.纵径12.0～45.5 mm,单果重量0.5 ～4.5 g.阴干种子横径为1.0～2.3 mm,纵径1.5～4.0mm,厚度1.0～1.5 mm.种子成熟期6月中旬至下旬,千粒重为7.8g,种子生活力为93.6％,含水量为12.04％,浸种12 h后,种子吸水率达70％.不同浓度的种子浸提液可明显抑制白菜种子的发芽和幼根生长并一定程度上抑制种子本身的生长,不同药物处理对新疆猪牙花种子没有影响,新疆猪牙花种子种皮无吸水障碍,新疆猪牙花种子有明显的休眠特性.种子体眠的主要原因与胚形态、晚熟及发芽抑制物有关.结论]新疆猪牙花种子透水性较好,吸水不存在障碍,因此其种皮透性不是引起种子体眠的原因.

Research on Biological Characteristics of Erythronium sibiricum(Fisch. et al. )Kryl. Seeds

Objective] To study the biological characteristics of Erythronium sibiricum(Fisch.et al.)Kryl.seeds,so as to provide a scientific basis for domestication and introduction of E.sibiricum.Method] The biological characteristics of E.sibiricum flowers,fruits and seeds were analyzed by using related literatures and biological knowledge.Result] The fruit was capsule,3 arris,fresh fruit grain diameter was 11.0-35.0 mm,longitudinal diameter was 12.0-45.5 mm,fruit weight was 0.5-4.5 g.Dry seed transverse diameter was 1.0-2.3 mm,longitudinal diameter was 1.5-4.0 mm,thickness was 1.0-1.5 mm.Seed maturity period was from the middle of June to late,grain weight was 7.8 g,seeds life force was 93.6%,and the water content was 12.04%,and the seed after 12 h,seed bibulous rate was 70%.Different concentration of seeds that carried liquid leaching significantly inhibited the germination of cabbage seeds and the growth of young roots.Besides,they could restrain the growth of the seed itself to a certain extent.Different drug treatments had no influence on the E.sibiricum seeds.Seeds were no obstacle about skin absorbing water,and had obvious dormancy characteristic.The seed dormancy was mainly related with embryos form,late-maturing and inhibition substances of sprouting.Conclusion] No obstacle about skin absorbing water is found in E.sibiricum seeds,that is,they have good water permeability.Seed coat permeability is not the reason for seed dormancy in E.sibiricum.