Estas caracteristicas ultraestructurales al parecer son comunes para las especies de Chara (Pickett-Heaps, 1968; Cocucci & Caceres, 1976; Robert, 1979; Vouilloud et al., 2010, 2012), pero no para los anterozoides de las especies de Nitella (Turner, 1968; Vouilloud et al., 2010).
An SEM study of developmental variation in oospore wall ornamentation of three Nitella species (Charophyta) in Australia.
Was it those with flagellated spores (e.g., forms such as Coleochaete) or those forms, such as Nitella and Chara, that produce no spores at all (flagellated or otherwise)?
Fossil representatives of the Charales (though not entirely the equivalent of modern genera such as Chara and Nitella) have great antiquity in the fossil record, as exemplified by finds of "gyrogonites" (fossil oogonia); such structures are known from the early Devonian (cf.
The depth interval 29-31 cm ([tilde]1960) represents a distinct peak in papyrus-seed abundance and contains the only Nitella fossils recovered from Unit III.
schweinfurthii, Najas pectinata, Nitella oligospora, and N.
On our trip, we first tried fishing deep holes with nitella
Aqui las mayores profundidades colonizadas por macrofitos, principalmente Nitella flexilis, fue de unos 4m (Fig.
Charophyta Characeae * Nitella flexilis (L.) Agardh.
Since PGs are presumed to have their action in membranes, and also since it is known that applied PG increased membrane permeability to potassium ions in Nitella
(1956) Velocity distribution of the protoplasmic streaming in Nitella
The characean algae, which include Chara and Nitella
, are thought to be the ancestors of all higher plants (Chapman & Buchheim, 1991; Graham, 1993; Graham & Kaneko, 1991; Grambast, 1974; Groves & Bullock-Webster, 1920, 1924; Imahori, 1954; Manhart & Palmer, 1990; Pal et al., 1962; Pickett-Heaps & Marchant, 1972; Wilcox et al., 1993; Wood & Imahori, 1964, 1965).