Oospore variation in three species of Chara (Charales, Chlorophyta).
First identification key for charophyte oospore from central Europe.
An SEM study of the oospore of some Nitella species (Chlorophyta, Charales) with descriptions of wall ornamentation and an assessment of its taxonomic importance.
by morphological characters, isozyme analysis and oospore wall ornamentation.
Fossils of obligate aquatic organisms, which include oospores of Characeae, and seeds of Potamogeton, indicate open water in layer V.
The water table continued to rise after that time, indicated by the presence of oospores of Characeae and seeds of Potamogeton and confirmed also by the presence of pollen of Myriophyllum and Potamogeton and non-pollen palynomorphs, such as algal Botryococcus and Pediastrum cf.
Celakovsky (1874) had recognized three generations in the life cycle of Coleochaete: zoospore-producing thalli (A); gamete-producing thalli (B); and the multicellular body produced from the fertilized oospore
For the inoculum, pearl millet leaves containing abundant oospores were collected from diseased 7042(S) and HB 3 plants growing in the downy mildew field nursery at ICRISAT-Patancheru 2 yr prior to the screen.
Here, in the field, inoculum was in the form of soilborne oospores and airborne sporangia, and plants were exposed to inoculum from seedling emergence to grain filling.
For the screen in the UK, oospores were collected from the field 2 yr before inoculum was collected for the screens carried out in India.
paragraph]) Plants infected by air-borne sporangia and soil-borne oospores in the field.
remains, abundant Characeae oospores
(120), remains of limnic animals (Daphnia ephippia, Plumatella statoplasts).