. "54" . "12"^^ . . "3"^^ . . "Rescue of the critically endangered long-stalked pondweed (Potamogeton praelongus) in the Czech Republic" . . "226641" . . . . "Rescue of the critically endangered long-stalked pondweed (Potamogeton praelongus) in the Czech Republic"@en . . "Potamogeton praelongus occurs in the CR at only one natural site near Hradec Kr\u00E1lov\u00E9. A new artificial site in an nearby oxbow was selected in 2008. Similar micropopulations were introduced to backwater pools in the Protected Landscape Koko\u0159\u00EDnsko in 2003-2005. Monitoring micropopulations and habitat factors at P. praelongus sites, investigation of seed germination, and preparation of a sterile in-vitro culture for plant propagation are described here. Between 2008-2010, both micropopulations in the Orlice floodplain increased their size by three times annually. In 2010, plant stand areas of four micropopulations in the Koko\u0159\u00EDnsko region were 12-50 m2. The most effective treatment to break seed dormancy involved 2-h surface sterilisation in 5 % or 2.5 % NaClO solution proceeded by a period of desiccation. Scarification plays an important role in breaking seed dormancy, mainly physical dormancy. Using similar methods of NaClO sterilisation, an in-vitro culture was prepared."@en . "Prausov\u00E1, R." . . . "Rescue of the critically endangered long-stalked pondweed (Potamogeton praelongus) in the Czech Republic" . "Adamec, Lubom\u00EDr" . . "Acta Biologica Slovenica" . . . . . "RIV/67985939:_____/11:00369742!RIV13-AV0-67985939" . "1408-3671" . "Janov\u00E1, J." . "RIV/67985939:_____/11:00369742" . "Rescue of the critically endangered long-stalked pondweed (Potamogeton praelongus) in the Czech Republic"@en . . "Potamogeton praelongus occurs in the CR at only one natural site near Hradec Kr\u00E1lov\u00E9. A new artificial site in an nearby oxbow was selected in 2008. Similar micropopulations were introduced to backwater pools in the Protected Landscape Koko\u0159\u00EDnsko in 2003-2005. Monitoring micropopulations and habitat factors at P. praelongus sites, investigation of seed germination, and preparation of a sterile in-vitro culture for plant propagation are described here. Between 2008-2010, both micropopulations in the Orlice floodplain increased their size by three times annually. In 2010, plant stand areas of four micropopulations in the Koko\u0159\u00EDnsko region were 12-50 m2. The most effective treatment to break seed dormancy involved 2-h surface sterilisation in 5 % or 2.5 % NaClO solution proceeded by a period of desiccation. Scarification plays an important role in breaking seed dormancy, mainly physical dormancy. Using similar methods of NaClO sterilisation, an in-vitro culture was prepared." . "SI - Slovinsk\u00E1 republika" . "V, Z(AV0Z60050516)" . "population monitoring; seed germination; tissue culture"@en . "[FE9E0797F72D]" . "1"^^ . "1" . .