Halicystis parvula
Webgreen alga Halicystis parvula-Derbesia tenitissima. II. Synchrony and periodicity in gamete formation and release. Am. Jour. Bot. 55: 1-11. 26 Jan 1968. RIDGWAY, JOHN E. The biotic relationship of Anthoceros and Phaeoceros to certain Cyanophyta. Ann. Missouri Bot. Gard. 54: 95-102. 27 Oct 1967. WebDec 1, 1970 · SUMMARY Halicystis osterhoutii is shown to be the gametophytic generation of a Derbesia species; problems involved in the identification and nomenclature of this species are discussed. ... Culture studies on the marine green alga Halicystis parvula–Derbesia tenuissima. II. Synchrony and periodicity in gamete formation and …
Halicystis parvula
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WebHalicystis parvula (Derbesia tenuissima) was obtained from Car olina Marine Laboratory, Beaufort, N.C., USA. The cells were maintained and cultivated at 17° C in water from the North Sea supplied by the Biomaris Company, Bremen (FRG). Cells of the gametophyte stage were used in the experiments. Their WebUsing cultured cells of the marine alga, Halicystis parvula, we measured the concentrations of 11 inorganic ions in the vacuolar sap and the electrical potential difference (PD) between the vacuole and the external solution. In normal cells under steady-state conditions a comparison of the electrochemical equilibrium (Nernst) potential for each ...
Webgiant algal cell Halicystis parvula was studied in order to predict the optimum conditions for electrically in duced cell-to-cell fusion. Using the charge pulse tech nique, the membranes were charged at different pulse lengths to the maximum voltage Vc. Because of a reversible, high-conductance state of the membrane WebApr 15, 2024 · Abstract. Several previously unreported features in the heteromorphic life cycle of Halicystis parvula – Derbesia tenuissima are described from cultural studies …
WebEvidence is presented for an endogenous rhythm which controls gamete formation in the coenocytic gametophytic stage of the marine alga Derbesia tenuissima (De Notaris) … WebThe observation that the interval between the appearance of new gametangia does not vary continuously when light or temperature is varied but tends to be a multiple of 4 days is the strongest evidence available that a true endogenous rhythm with a period of about4 days is present in Derbesia. Evidence is presented for an endogenous rhythm which controls …
WebIon transport in the giant celled marine alga, Valonia ventricosa, was studied during internal perfusion and short-circuiting of the vacuole potential.The perfusing and bathing solutions were similar to natural Valonia sap and contained the following concentrations of major ions: Na 51, K 618, and Cl 652 m M.The average short-circuit current (I sc) was 97 pEq/cm 2 …
WebHalicystis parvula F.Schmitz ex Murray, 1893. Guiry, M.D. & Guiry, G.M. (2024). AlgaeBase. World-wide electronic publication, National University of Ireland, Galway (taxonomic information republished from AlgaeBase with permission of M.D. Guiry). … dvd avec colin firthWebUsing cultured cells of the marine alga, Halicystis parvula, the concentrations of 11 inorganic ions in the vacuolar sap and the electrical potential difference between the Vacuole and the external solution were measured and the volumetric elastic modulus of the cell wall was measured to measure the change in cell volume when the internal … dvd avviabile iso win10WebUnialgal cultures of the macroscopic, vesicular, coenocytic gametophyte (Halicystis parvula Schmitz) of Derbesia tenuissima (DeNotaris) Crouan fr. were grown under various environmental regimes to elucidate the cytology of gamete formation and the factors controlling synchronous gamete formation and release.No synchrony of nuclear division … dvd avkodare windows media player gratisWebDec 1, 1970 · The occurrence of the directly reproducing deep water form of D. marina is presented as evidence for speciation of a sporophyte (Derbesia) independent of its alternate gametophyte (Halicystis). An hypothesis is advanced to explain the source and means for expression of genetic variability necessary for speciation in a population of nonsexually ... dvd autorun windows 11WebUnialgal cultures of the macroscopic, vesicular, coenocytic gametophyte (Halicystis parvula Schmitz) of Derbesia tenuissima (DeNotaris) Crouan fr. were grown under … dvd avspilling windows 10WebSur l'existence d'une alternance de générations entre l'Halicystis parvula Schmitz et leDerbesia tenuissima (De Not.) Crn. C. r. hebd. Séanc. Acad. Sci., Paris230, 322–323. Google Scholar —— 1952. Les cycles de reproduction des algues et leur rapports avec la phylogénie. Revue Cytol. Biol. vég.13, 1–49. dust seed lubricantWebMay 7, 2014 · Cell wall elasticity can vary greatly among plant species, with reported ranges of ɛ from 0.06 MPa in Halicystis parvula to 70 MPa in Chara corrallina (Dainty et al. 1974; Graves and Gutknecht 1976). dust screening