摘要
海菖蒲果实呈卵圆形,直径(41.57±5.54)mm,密度(0.90±0.04)g/cm~3,每个果实含有3~16粒种子。海菖蒲种子呈上小下大的锥形结构,直径(14.23±1.38)mm,密度(1.17±0.07)g/cm~3。种子从果实释放到海水中时其外部包裹一层半透明膜质种皮并可漂浮于水面;种子在海水中下沉时总是保持基部向下的姿态。海菖蒲幼苗根部布满可粘附碳酸盐砂粒的丝状根毛。幼苗生长过程中,残留种子干重和氮含量持续降低。底质类型不影响海菖蒲种子的萌发率,但与钙质沉积物相比,硅质底质更有利于幼苗的生长发育。
The fruit of Enhalus acoroides was oval,with a diameter of(41.57±5.54)mm and a density of(0.90±0.04)g/cm~3.Each fruit contained 3 to 16 seeds.The seed of E.acoroides had a conical structure with a diameter of(14.23±1.38)mm and a density of(1.17±0.07)g/cm~3.When the seed was released from the fruit into seawater,it was wrapped with a translucent membranous seed coat and could float on the water surface.When the seed sinked in the seawater,it always kept its base downward.The roots of E.acoroides seedlings were covered with filamentous root hairs which could adhere to carbonate sand particles.During seedling growth,the dry weight and nitrogen content of residual seeds decreased continuously.The germination rate of E.acoroides seeds was not affected by sediment types,while siliceous substrate was more beneficial to the growth and development of seedlings compared with calcareous substrate.
作者
蔡嘉丽
史云峰
李照阳
赵牧秋
罗慧珏
史志强
韩秋影
CAI Jiali;SHI Yunfeng;LI Zhaoyang;ZHAO Muqiu;LUO Huijue;SHI Zhiqiang;HAN Qiuying(Yazhouwan Innovation Research Institute of Hainan Tropical Ocean University,Sanya Hainan 572022,China;Hainan Modern Marine Ranch Engineering Research Center,Sanya Hainan 572022,China;Key Laboratory of Coastal Marine Ecological Environment Process and Carbon Sink of Hainan,Sanya Hainan 572022,China)
出处
《种子》
北大核心
2023年第2期83-89,共7页
Seed
基金
海南崖州湾重大科技计划项目(2022 CXYZD 002-02)
海南省研究生创新科研项目(Qhys 2021-391,Qhys 2021-393)
大学生创新创业训练计划项目(202011100016,S 202111100039)。
关键词
海菖蒲
果实
种子
幼苗
生态适应
Enhalus acoroides
fruit
seed
seedling
ecological adaptation
作者简介
蔡嘉丽(1997-),女(汉族),福建漳州人,在读硕士,研究方向:海岸带生态系统生态演变与生态修复,E-mail:624887812@qq.com;通讯作者:赵牧秋(1983-),女(满族),辽宁沈阳人,博士,教授,硕士生导师,研究方向:海洋生态,E-mail:zhaomuqiu@sina.com。
