摘要
沉水植物在湖泊生态系统中具有重要作用,它不仅是湖泊生态系统食物链中重要的生产者,同时还对湖泊的营养物沉积和循环有着重要的意义,并由此影响着湖泊的富营养化进程.本文以黄河内蒙古段河套灌区湖泊中常见的3种沉水植物篦齿眼子菜(Potamogeton pectinatus)、穿叶眼子菜(Potamogeton perfoliatus)和狐尾藻(Myriophyllum verticillatum)为研究对象,对其种子休眠及萌发特性进行了初步研究.结果表明:狐尾藻种子休眠率较高但休眠易破除,通过切破种皮、低温层积、硝酸钾和赤霉素处理均可显著提高萌发率;篦齿眼子菜种子休眠性较强,低温层积及赤霉素浸泡处理能够显著提高其萌发率;穿叶眼子菜有较深的休眠特性,破除硬实、硝酸钾、赤霉素及低温层积处理均不能有效解除其休眠.
Submerged macrophyte plays an important role in lake ecosystems. It is not only a primary producer in the food chain, but also plays a major role in lake nutrient accumulation and circulation, thus, having a great influence on the eutrophication process of lakes. This study reports the seed dormancy and germination of three submerged macrophytes （ Potamogeton pectinatus, Patamogeton perfoliatus and Myriophyllum verticillatum） in the Yellow River, located in the Hetao irrigation area of the Inner Mon- golia. The result shows：Myriophyllum verticillatum seed has a high dormancy rate, but its dormancy is easy to be broken. Various treatments including seed coat scarification, low temperature stratification, applications of KNO3 and gibberellin can significantly increase the germination percentages. Potamogeton pectinatus seed has a deep dormancy. Low temperature stratification and appli- cation of GA carl effectively break the seed dormancy, but other treatments had no effect on. Potamogeton perfoliatus seed has a deep dormancy. None of the above mentioned treatments can significantly break its dormancy.
出处
《湖泊科学》
EI
CAS
CSCD
北大核心
2013年第1期115-118,共4页
Journal of Lake Sciences
基金
国家水体污染控制与治理科技重大专项项目(2009ZX07212-004-3)
内蒙古自治区自然科学基金项目(2009ws0510)
内蒙古农业大学科技创新团队项目(NDTD2010-5)联合资助
关键词
沉水植物
种子休眠
萌发
篦齿眼子菜
穿叶眼子菜
狐尾藻
河套灌区
Submerged macrophytes
seed dormancy
germination
Potamogeton pectinatus
Potamogeton perfoliatus
Myriophyl-lure verticillatum
Hetao Irrigation area
