沙生植物滨旋花种子特性及萌发研究  

The Studies on Seed Characteristic and Germination of Calystegia soldanella

作　　者：王子华[1] 代波[1] 潘玉霞[1] 孟宪东[2] 徐兴友 

机构地区：[1]河北科技师范学院园艺科技学院,河北昌黎066600 [2]河北科技师范学院野生植物资源应用研究所,河北昌黎066600

出　　处：《中国农学通报》2011年第10期113-117,共5页Chinese Agricultural Science Bulletin

基　　金：河北科技师范学院博士基金资助项目"耐盐碱植物资源的选育与应用"(2005008)

摘　　要：滨旋花是一种兼有观赏价值、药用价值、生态保护作用的滨海沙生植物。笔者对滨旋花种子形态特征、休眠特性和解除种子休眠的方法进行研究。结果表明:滨旋花种子黑色,卵圆形,为大型种子,质地坚硬。扫描电镜观察,滨旋花种皮表面具有不规则的六边形网格纹饰,网壁和网眼非常致密。未经处理种子吸水率很低,不能发芽,低温层积不能打破休眠。98%的浓硫酸处理60min发芽率达94.9%;开水烫种发芽率达50%;混细沙研磨发芽率达81.8%,发芽最为迅速。由此可见,滨旋花种子休眠是由于种皮透性差造成的,改善种皮的通透性可以解除休眠,浓硫酸处理效果最好,混细沙研磨是环保型有效方法。Calystegia soldanella is an important plant growing in seashore with ornamental,medicinal and ecology protective value.The seed morphology and the seed dormancy characteristic ofCalystegia soldanella were studied in this paper.The result was as follows：the seed ofCalystegia soldanella was black,large,ovate and hard.The testa sculptures were irregular hexagonal mesh cell with compact wall observed by scanning electron microscope.The untreatment seeds absorbed little water and cannot germinate,low temperature stratification cannot break dormancy.The seeds treated with 98% sulfuric acid for 60 min germinated 94.9%,50% treated by 100℃ hot water and 81.8% with fine sand friction.In conclusion,the dormancy ofCalystegia soldanella seed was result of water impermeability of seed coat.The methods of improving water permeability can break seed dormancy.Soaking seeds with concentrated sulfuric acid for 60 minutes was the effective method to increase germination percentage.Abraded seed with fine sand was the environmental-friendly methods of break dormancy.

关 键 词：滨旋花 沙生植物 种子 休眠 

分 类 号：Q945.35[生物学—植物学]