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Green matter, zoospores, and diatoms
2023Abstract The gravest risks to a sharp plant-animal dichotomy arose at the interface between infusoria and algae. This chapter treats four case studies: the “green matter” debate initiated by Priestley in the 1770s; the recognition of motile “zoospores” after 1803; experiments on algal metamorphosis from the 1810s through the 1840s; and ...
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Structure of Labyrinthula sp. Zoospores*
The Journal of Protozoology, 1968SYNOPSIS. A species of Labyrinthula closely resembling L. algeriensis was isolated from marsh grass, Spartina alterniflora. Zoosporulation was obtained in ∼50% of the cultures, which were grown on a modified Vishniac medium, when yeasts were used as food organisms; when the temperature was ∼22 C; when thiamine (0.2 mg/l, biotin (1 μg/l, Ba (1 μg/l ...
JAMES P. AMON, FRANK O. PERKINS
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Zoospore discharge in Thraustochytrium striatum
Transactions of the British Mycological Society, 1974The development of the sporangial wall in Thraustochytrium striatum Schneider has been studied by light, scanning and transmission electron microscopy. The wall is multilamellate and fragments at maturity to release the zoospores. Use of the term deliquescence to describe wall behaviour at spore release is shown to be incorrect and the term ...
J.L. Harrison, E.B. Gareth Jones
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Zoospore production in Pythium spinosum
Mycological Research, 1993When exposed to a non-sterile soil extract and light, six South African isolates of Pythium spinosum and two isolates from culture collections produced zoospores, a process which has not been reported for this species. Autoclaved and filter-sterilized soil extract, as well as a defined salt solution, failed to induce sporangial formation.
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The Zoospores of Chroolepus, Ag*
Journal of Cell ScienceABSTRACT The first of the plants to which the observations refer is Chroolepus aureum, Spr. var. tomentosum, Kg. Under the microscope, the plant is seen to be formed of erect threads, intermixed with branched threads, each consisting of a single row of cells. The walls are colourless, but with a glittering appearance. (Pl. IX, fig. 1, s.)
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