404 CHLOROPLAST E.R.: EVOLUTION OF TWO MEMBRANES

of maximum size are produced within each auxospore. The four discarded valves of the mother cells are often seen attached to the newly formed frustules.

The life cycle of Pseudo-nitzschia (Fig. 17.29) is similar to Pinnularia.

REFERENCES

Alcoverro, T., Conte, E., and Mazzella, L. (2000). Production of mucilage by the Adriatic epipelic diatom Cylindrotheca closterium (Bacillariophyceae) under nutrient limitation. J. Phycol. 36:1087–95.

Andersen, L. W. J., and Sweeney, B. M. (1977). Diel changes in sedimentary characteristics of Ditylum brightwelli: Changes in cellular lipid and effects of respiratory inhibitors and ion transport modifiers.

Limnol. Oceanogr. 22:539–52.

Andersen, R. A., Medlin, L. K., and Crawford, R. M. (1986). An investigation of the cell wall components of Actinocyclus subtilis (Bacillariophyceae). J. Phycol. 22:466–79.

Anderson, O. R. (1975). The ultrastructure and cytochemistry of resting cell formation in Amphora coffaeformis (Bacillariophyceae). J. Phycol. 11:272–81.

Anderson, O. R. (1976). Respiration and photosynthesis during resting cell formation in Amphora coffaeformis (Ag.) Kütz. Limnol. Oceanogr. 21:452–6.

Bates, S. S. (2000). Domoic-acid-producing diatoms: another genus added. J. Phycol. 36:978–85.

Beattie, A., Hirst, E. L., and Percival, E. (1961). Studies on the metabolism of the Chrysophyceae. Comparative structural investigations on leucosin (chrysolaminarin) separated from diatoms and laminarin from brown algae. Biochem. J. 79:531–6.

Bidle, K. D., and Azam, F. (1999). Accelerated dissolution of diatom silica by marine bacterial assemblages. Nature 397:508–12.

Branton, D., Cohen, C. M., and Tyler, T. (1981). Interaction of cytoskeletal proteins on the human erythrocyte membrane. Cell 24:24–32.

Brzezinski, M. A., and Conley, D. J. (1994). Silicon deposition during the cell cycle of Thalassiosira weissflogii (Bacillariophyceae) determined using dual rhodamine 123 and propidium iodide staining. J. Phycol. 30:45–55.

Caldwell, G. S., Bentley, M. G., and Olive, P. J. W. (2004). First evidence of sperm motility inhibition by the diatom aldehyde 2E,4E-decadienal. Mar. Ecol. Progr. Ser. 273:97–108.

Casotti, R., Mazza, S., Brunet, C., Vantrepotte, V., Ianora, A., and Miralto, A. (2005). Growth inhibition

and toxicity of the diatom aldehyde 2-trans,4-trans- decadienal on Thalassiosira weissflogii. J. Phycol. 41:7–20.

Chepurnov, V. A., Mann, D. G., Sabbe, K., and Vyverman, W. (2004). Experimental studies on sexual reproduction in diatoms. Int. Rev. Cytol. 237:91–154.

Chiovitti, A., Bacic, A., Burke, J., and Wetherbee, R. (2003). Heterogenous xylose-rich glycans are associated with extracellular glycoproteins in the biofouling diatom Craspedostauros australis

(Bacllariophyceae). Eur. J. Phycol. 38:351–60. Chiovitti, A., Molino, P., Crawford, S. A., Teng, R.,

Spurck, T., and Wetherbee, R. (2004). The glucans extracted with warm water from diatoms are mainly derived from intracellular chrysolaminarin and not extracellular polysaccharides. Eur. J. Phycol. 39:117–28.

Clavero, E., Hernandez-Marine, M., Grimalt, J. O., and Garcia-Pichel, F. (2000). Salinity tolerance of diatoms from thalassic hypersaline environments. J. Phycol. 36:1021–34.

Cohn, S. A., and Weitzell, R. E. (1996). Ecological consideration of diatom cell motility. I. Characterization of motility and adhesion in four diatom species. J. Phycol. 32:918–39.

Cohn, S. A., Spurck, T. P., and Pickett-Heaps, J. D. (1989). Perizonium and initial valve formation in the diatom Navicula cuspidata (Bacillariophyceae). J. Phycol. 25:15–26.

Cooksey, K. E., and Cooksey, B. (1974). Calcium deficiency can induce the transition from oval to fusiform cells in cultures of Phaeodactylum tricornutum Bohlin. J. Phycol. 10:89–90.

Coombs, J., and Volcani, B. E. (1968). Studies on the biochemistry and fine structure of silica shell formation in diatoms. Chemical changes in the wall of

Navicula pelliculosa during its formation. Planta

82:280–92.

Crawford, R. M. (1971). The fine structure of the frustule of Melosira varians C. A. Agardh, Br. Phycol. J. 6:175–86.

Crawford, R. M. (1974). The auxospore wall of the marine diatom Melosira nummuloides (Dillw.) C. Ag. and related species. Br. Phycol. J. 9:9–20.

Crawford, S. A., Higgins, M. J., Mulvaney, P., and Wetherbee, R. (2001). Nanostructure of the diatom frustule as revealed by atomic force and scanning electron microscopy. J. Phycol. 37:543–54.

Damste, J. S. S., Muyzer, G., Abbas, B., et al. (2004). The rise of rhizosolenid diatoms. Science 304:584–7.

Davidovich, N. A. and Bates, S. S. (1998). Sexual reproduction in the pennate diatoms Pseudo-nitzschia multi-

HETEROKONTOPHYTA, BACILLARIOPHYCEAE	405

series and P. pseudodelicatissima (Bacillariophyceae). J. Phycol. 34:126–37.

Davis, C. O., Hollibaugh, J. T., Seibert, D. L. R., Thomas, W. H., and Harrison, P. J. (1980). Formation of resting spores by Leptocylindrus danicus (Bacillariophyceae) in a controlled experimental ecosystem. J. Phycol.

16:296–302.

Dawson, P. A. (1973). Observations on the structure of some forms of Gomphonema parvulum Kütz. III. Frustule formation. J. Phycol. 9:353–64.

de Brouwer, J. F. C., and Stal, L. J. (2002). Daily fluctuation of exopolymers in cultures of the benthic diatoms Cylindrotheca closterium amd Nitzschia sp. (Bacillariophyceae). J. Phycol. 38:464–72.

Del Amo, Y., and Brzezinski, M. A. (1999). The chemical form of dissolved Si taken up by marine diatoms. J. Phycol. 35:1162–70.

Drum, R. W., and Hopkins, J. T. (1966). Diatom locomotion: An explanation. Protoplasma 62:1–33.

Edgar, L. A. (1979). Diatom locomotion: Computer assisted analysis of cine film. Br. Phycol. J. 14:83–101.

Edlund, M. B., and Stoermer, E. F. (1997). Ecological, evolutionary, and systematic significance of diatom life histories. J. Phycol. 33:897–918.

Erickson, S. J. (1972). Toxicity of copper to Thalassiosira pseudonana in unenriched inshore seawater. J. Phycol. 8:318–23.

Fairchild, E., and Sheriden, R. P. (1974). A physiological investigation of the hot spring diatom Achnanthes exigua. Grün. J. Phycol. 10:1–4.

Fauré-Fremiet, E. (1951). The tidal rhythm of the diatom Hantzschia amphioxys. Biol. Bull. 100:173–7.

Fisher, A. E., and Harrison, P. J. (1996). Does carbohydrate content effect the sinking rate of marine diatoms. J. Phycol. 32:360–5.

French, F. W., and Hargraves, P. E. (1985). Spore formation in the life cycles of the diatoms Chaetoceros diadema and Leptocylindrus danicus. J. Phycol. 21:477–83.

Granum, E., and Myklestad, S. M. (2001). Mobilization of -1,3-glucan and biosynthesis of amino acids induced by NH4 addition to N-limited cells of the marine diatom Skeletonema costatum

(Bacillariophyceae). J. Phycol. 37:772–82.

Gross, F. (1940). The development of isolated resting spores into auxospores in Ditylum brightwelli (West). J. Mar. Biol. Assoc. UK 24:375–80.

Guillou, L., Chretiennot-Dinet, M.-J., Medlin, L. K., Claustre, H., Loiseaux-de Goer, S., and Vaulot, D. (1999). Bolidomonas: a new genus with two species belonging to a new algal class, the Bolidophyceae (Heterokonta). J. Phycol. 35:368–81.

Hargraves, P. E. (1972). Studies on marine planktonic diatoms. I. Chaetoceros diadema (Ehr.) Gran.: Life cycle, structural morphology, and regional distribution.

Phycologia 11:247–57.

Hasle, G. R. (1995). Pseudo-nitzschia punges and P. multiseries (Bacillariophyceae): nomenclature history, morphology and distribution. J. Phycol. 31:428–35.

Hasle, G. R., and Lange, C. B. (1989). Freshwater and brackish water Thalassiosira (Bacillariophyceae): taxa with tangentially undulated valves. Phycologia 28:120–35.

Hecky, R. F., Mopper, K., Kilham, P., and Degens, E. T. (1973). The amino acid and sugar composition of diatom cell walls. Mar. Biol. 19:323–31.

Hellebust, J. A. (1971). Glucose uptake by Cyclotella cryptica: Dark induction and light inactivation of transport system. J. Phycol. 7:345–49.

Hendey, N. I. (1964). An introductory account of the smaller algae of British coastal waters. Part V. Bacillariophyceae (diatoms). Fish. Invest. Ser. IV. H.M.S.O., London.

Hendey, N. I. (1971). Electron microscope studies and the classification of diatoms. In The Micropaleontology of Oceans, ed. B. M. Funnell, and W. R. Riedel,

pp. 625–31. Cambridge: Cambridge University Press.

Higgins, M. J., Molino, P., Mulvaney, P., and Wetherbee, R. (2003). The structure and nanomechanical properties of the adhesive mucilage that mediates diatomsubstratum adhesion and motility. J. Phycol. 39:1181–93.

Hildebrand, M. (2004). Silicic acid transport and its control during cell wall silicification in diatoms. In

Biomineralization: Progress in Biology, Molecular Biology and Application, ed. E. Baeuerlein, pp. 158–76. Weinheim: Wiley-VCH.

Hoagland, K. D., Rosowski, J. R., Gretz, M. R., and Romer, S. C. (1993). Diatom extracellular polymeric substances: Function, fine structure, chemistry, and physiology. J. Phycol. 29:537–66.

Iler, R. K. (1979). The Chemistry of Silica. New York: John Wiley.

Jeffrey, S. W. (1976). A report of green algal pigments in the central north Pacific Ocean. Mar. Biol. 37:33–7.

Jeffrey, S. W., and Vesk, M. (1977). Effect of blue-green light on photosynthetic pigments and chloroplast structure in the marine diatom Stephanopyxis turris. J. Phycol. 13:271–9.

Jensen, K. G., Moestrup, Ø., and Schmid, A.-M. (2003). Ultrastructure of the male gametes from two centric diatoms, Chaetoceros laciniosus and Coscinodiscus wailesii (Bacillariophyceae). Phycologia 42:98–105.

406 CHLOROPLAST E.R.: EVOLUTION OF TWO MEMBRANES

Johnson, L. M., Hoagland, K. D., and Gretz, M. R. (1995). Effects of bromide and iodide on stalk secretion in the biofouling diatom Achnanthes longipes (Bacillariophyceae). J. Phycol. 31:401–12.

Knudson, B. M. (1957). Ecology of the epiphytic diatom

Tabellaria flocculosa (Roth) Kütz. var. flocculosa in three English lakes. J. Ecol. 45:93–112.

Kroger, N. (2001). The sweetness of diatom molecular engineering. J. Phycol. 37:657–8.

Kroger, N., and Sumper, M. (2004). The molceular basis of diatom biosilica formation. In Biomineralization:

Progress in Biology, Molecular Biology and Application, ed. E. Baeuerlein, pp. 137–58. Weinheim: Wiley-VCH.

Kroger, N., Deutzmann, R. and Sumper, M. (1999). Polycationic peptides from diatom biosilica that direct silica nanosphere formation. Science 286:1129–32.

Kroger, N., Deutzmann, R. and Sumper, M. (2000). Species-specific polyamines from diatoms control silica morphology. Proc. Natl. Acad. Sci., USA 97:14133–8.

Lauritis, J. A., Coombs, J., and Volcani, B. E. (1968). Studies on the biochemistry and fine structure of silica shell formation in diatoms. IV. Fine structure of the apochlorotic diatom Nitzschia alba Lewin and Lewin. Arch. Mikrobiol. 62:1–16.

Lewin, J. C. (1953). Heterotrophy in diatoms. J. Gen. Microbiol. 9:305–13.

Lewin, J. C. (1962). Silicification. In Physiology and Biochemistry of the Algae, ed. R. A. Lewin, pp. 445–55. New York: Academic Press.

Lewin, J. C. (1966). Silicon metabolism in diatoms. V. Germanium dioxide, a specific inhibitor of diatom growth. Phycologia 6:1–12.

Lewin, J. C., and Lewin, R. A. (1960). Auxotrophy and heterotrophy in marine littoral diatoms. Can. J. Microbiol. 6:127–34.

Lewin, J. C., and Lewin, R. A. (1967). Culture and nutrition of some apochlorotic diatoms of the genus

Nitzschia. J. Gen. Microbiol. 46:361–7.

Li, C-W., Chu, S., and Lee, M. (1989). Characterizing the silica deposition vesicle of diatoms. Protoplasma 151:156–63.

Lund, J. W. G. (1949). Studies on Asterionella. I. The origin and nature of the cells producing seasonal maxima. J. Ecol. 37:389–419.

Lund, J. W. G. (1950). Studies on Asterionella formosa Hass. II. Nutrient depletion and the spring maximum J. Ecol. 38:1–14, 15–35.

Lund, J. W. G. (1959). Buoyancy in relation to the ecology of freshwater phytoplankton, Br. Phycol. Bull. 7:17.

Lundholm, N., and Moestrup, O. (2000). Morphology of the marine diatom Nitzschia navis-varingica, sp. nov. (Bacillariophyceae), another producer of the neurotoxin domoic acid. J. Phycol. 36:1162–74.

McQuoid, M. R., and Hobson, L. A. (1996). Diatom resting stages. J. Phycol. 32:889–902.

Mann, J. E., and Myers, J. (1968). On pigments, growth and photosynthesis of Phaeodactylum tricornutum. J. Phycol. 4:349–55.

Mansour, M. P., Volkman, J. K., Jackson, A. E., and Blackburn, S.I. (1999). The fatty acid and sterol composition of five marine dinoflagellates. J. Phycol. 35:710–29.

Martinez, L. A., Silver, M. W., King, J. M., and Alldredge, A. L. (1983). Nitrogen fixation by floating diatom mats: A source of new nitrogen to oligotrophic ocean waters. Science 221:152–4.

Martin-Jezequel, V., Hildebrand, M., and Brzezinski,

M. A. (2000). Silicon metabolism in diatoms: implications for growth. J. Phycol. 36:821–40.

Medlin, L. K., and Kaczmarka, I. (2004). Evolution of the diatoms: V. Morphological and cytological support for the major clades and a taxonomic revision.

Phycologia 43:245–70.

Medlin, L. K., Crawford, R. M., and Andersen, R. A. (1986). Histochemical and ultrastructural evidence for the function of the labiate process in the movement of centric diatoms. Br. Phycol. J. 21:297–301.

Medlin, L. K., Williams, D. M., and Sims, P. A. (1993). The evolution of the diatoms (Bacillariophyta). I. Origin of the group and assessment of the monophyly of its major divisions. Eur. J. Phycol. 28:261–75.

Medlin, L. K., Kooistra, W. H. C. F., Gersonde, R., Sims, P. A., and Wellbrock, U. (1997). Is the origin of diatoms related to the end-Permian mass extinction?

Nova Hedwigia 65:1–11.

Mehta, S. C., Venkataraman, G. S., and Das, S. C. (1961). The fine structure and the cell wall nature of

Diatoma hiemale var. mesodan (Her.) Grun. Rev. Algol., N.S. 6:49–52.

Miralto, A., Barone, G., Romano, G. et al. (1999). The insidious effect of diatoms on copepod reproduction. Nature 402:173–6.

Moore, J. K., and Villareal, T. A. (1996). Size-ascent rate relationships in positively buoyant marine diatoms.

Limnol. Oceanog. 41:1514–20.

Morel, N. M. L., Rueter, J. G., and Morel, F. M. M. (1978). Copper toxicity to Skeletonema costatum. J. Phycol. 14:43–8.

Nagai, S., Hori, Y., Manabe, T., and Imai, I. (1995). Restoration of cell size by vegetative cell enlargement

HETEROKONTOPHYTA, BACILLARIOPHYCEAE	407

in Coscinodiscus wailesii (Bacillariophyceae). Phycologia

34:533–55.

Nakajima, T., and Volcani, B. E. (1969). 3,4- Dihydroxyproline: a new amino acid from diatom cell walls. Science 164:1400–1.

Navarro, J. N. (1993). Three-dimensional imaging of diatom ultrastructure with high resolution lowvoltage SEM. Phycologia 32:151–6.

Nultsch, W. (1956). Studien über die Phototaxis der Diatomeen. Arch. Protistenk. 101:1–68.

Pan, Y., Subba Rao, D. V., and Mann, K. H. (1996). Changes in domoic acid production and cellular chemical composition of the toxigenic diatom

Pseudo-nitzschia multiseries under phosphate limitation. J. Phycol. 32:371–81.

Perry, C. C., and Keeling-Tucker, T. (2000). Biosilicification: the role of the organic matrix in structure control. J. Biol. Inorg. Chem. 5:537–50.

Pickett-Heaps, J. D., Tippit, D. H., and Andreozzi, J. A. (1979a). Cell division in the pennate diatom Pinnularia. III. The valve and associated organelles.

Biol. Cellulaire 35:195–8.

Pickett-Heaps, J. D., Tippit, D. H., and Andreozzi, J. A. (1979b). Cell division in the pennate diatom

Pinnularia. IV. Valve morphogenesis. Biol. Cellulaire

35:199–206.

Pickett-Heaps, J. D., Hill, D. R. A., and Wetherbee, R. (1986). Cellular movement in the centric diatom

Odontella sinensis. J. Phycol. 22:334–9. Pickett-Heaps, J. D., Carpenter, J., and Koutoulis, A.

(1994). Valve and seta (spine) morphogenesis in the centric diatom Chaetoceros peruvianus Brightwell.

Protoplasma 181:269–82.

Pohnert, G. (2002). Phospholipase A2 activity triggers the wound-activated chemical defense in the diatom

Thalassiosira rotula. Plant Physiol. 129:103–11. Pohnert, G., and Boland, W. (2002). The oxylipin chem-

istry of attraction and defense in brown algae and diatoms. Nat. Prod. Rep. 19:108–22.

Pohnert, G., Lumineau, O., Cueff, A., et al. (2002). Are volatile unsaturated aldehydes from diatoms the main line of chemical defence against copepods?

Mar. Ecol. Progr. Ser. 245:33–45.

Potapova, M., and Snoeijs, P. (1997). The natural life cycle in the wild populations of Diatoma moniliformis (Bacillariophyceae) and its disruption in an aberrant environment. J. Phycol. 33:924–37.

Poulin, M., Masse, G., Belt, S. T., Delavault, P., Rousseau, J.-M., and Rowland, S. J. (2004). Morphological, biochemical and molecular evidence for the transfer of

Gyrosigma nipkowii Meister to the genus Halsea

(Bacillariophyta). Eur. J. Phycol. 39:181–95.

Prasad, A. K. S. K., Nienow, J. A., and Livingstone, R. J. (1990). The genus Cyclotella (Bacillariophyta) in Choctawhatchee Bay Florida, with special reference to C. striata and C. choctawhatcheeana sp. nov. Phycologia 29:418–36.

Prasad, A. K. S. K., Riddle, K. A., and Nienow, J. A. (2000). Marine diatom genus Climaconeis (Berkeleyaceae, Bacillariophyta): two new species, Climaconeis koenigii, and C. colemaniae, from Florida Bay, U.S.A. Phycologia 39:199–211.

Reavic, E. D., Smol, J.-P., Carignan, R., and Lorrain, S. (1998). Diatom paleolimnology of two fluvial lakes in the St. Lawrence River. A reconstruction of environmental changes during the last century. J. Phycol. 34:446–56.

Reimann, B. E. F., Lewin, J. C., and Volcani, B. E. (1965). Studies on the biochemistry and fine structure of silica shell formation in diatoms. I. The structure of the cell wall of Cylindrotheca fusiformis Reimann and Lewin. J. Cell Biol. 24:39–55.

Reisen, W. K., and Spencer, D. J. (1970). Succession and current demand relationships of diatoms on artifical substrates in Prater’s Creek, South Carolina,

J. Phycol. 6:117–21.

Richardson, J. L., Mody, N. S., and Stacey, M. E. (1996). Diatoms and water quality in Lancaster County (PA) streams: a 45-year perspective. Pennsylvania Acad. Sci. 70:30–9.

Rogall, E. (1939). Über den Feinbau der Lieselmembran der Diatomeen. Planta 29:279–91.

Ross, R., and Sims, P. A. (1972). The fine structure of the frustule in centric diatoms: A suggested terminology. Br. Phycol. J. 7:139–63.

Round, F. E. (1957). The late-glacial and post-glacial diatom succession in the Kentmere valley deposit. I. Introduction, methods and flora. New Phytol. 56:98–126.

Round, F. E. (1961). The diatoms of a core from Esthwaite water. New Phytol. 60:43–59.

Round, F. E., Crawford, R. M., and Mann, D. G. (1990). The Diatoms. Cambridge: Cambridge University Press. 747 pp.

Rueter, J. G. (1983). Effect of copper on growth, silicic acid uptake and soluble pools of silicic acid in the marine diatom, Thalassiosira weisflogii

(Bacillariophyceae). J. Phycol. 19:101–4.

Rueter, J. G., Chisholm, S. W., and Morel, F. M. M. (1981). Effects of copper toxicity on silicic acid uptake and growth in Thalassiosira pseudonana. J. Phycol. 17:270–8.

Sato, S., Nagumo, T., and Tanaka, J. (2004). Auxospore formation and the morphology of the initial cell of

408 CHLOROPLAST E.R.: EVOLUTION OF TWO MEMBRANES

marine araphid diaton Gephyria media (Bacillariophyceae). J. Phycol. 40:684–91.

Schmaljohann, R., and Röttger, R. (1978). The ultrastructure and taxonomic identity of the symbiotic algae of Heterostegina depressa (Foraminifera: Nummulitidae). J. Mar. Biol. Assoc. UK 58:227–37.

Schmid, A.-M. M., and Crawford, R. M. (2001). Ellerbeckia arenaria (Bacillariophyceae): formation of auxospores and initial cells. Eur. J. Phycol. 36:307–20.

Schmid, A.-M. M., and Volcani, B. E. (1983). Wall morphogenesis in Coscinodiscus wailesii Gran and Angst. I. Valve morphology and development of its architecture. J. Phycol. 19:387–402.

Shipe, R. F., Brzezinski, M. A., Pilskaln, C., and Villareal, T. A. (1999). Rhizosolenia mats: an overlooked source of silica production in the open sea.

Limnol. Oceanogr. 44:1282–92.

Sicko-Goad, L., Stoermer, E. F., and Fahnensteil, G. (1986). Rejuvenation of Melosira granulata (Bacillariophyceae) resting cells from anoxic sediments of Douglas Lake, Michigan. I. Light microscopy and 14C uptake. J. Phycol. 22:22–8.

Smayda, T. J. (1970). The suspension and sinking of phytoplankton in the sea. Oceanogr. Mar. Biol. Annu. Rev.

8:353–414.

Staats, N., de Winder, B., Stal, L. J., and Mur, L. R. (1999). Isolation and characterization of extracellular polysaccharides from the epipelic diatoms Cylindrotheca closterium and Navicula salinarum. Eur. J. Phycol. 34:161–9.

Stoermer, E. F., Pankratz, H. S., and Drum, R. W. (1965). The fine structure of Mastogloia grevillei Wm. Smith,

Protoplasma 59:1–13.

Subba Rao, D. V., Quilliam, M. A., and Pocklinton, R. (1988). Domoic acid – a neurotoxic amino acid produced by the marine diatom Nitzschia pungens in culture. Can. J. Fish. Aquat. Sci. 45:2076–9.

Sullivan, C. W. (1977). Diatom mineralization of silicic acid. II. Regulation of Si(OH)4 transport rates during the cell cycle of Navicula pelliculosa. J. Phycol. 13:86–91.

Thomas, W. H., Hollibaugh, J. T., and Seibert, D. L. R. (1980). Effects of heavy metals on the morphology of some marine phytoplankton. Phycologia 19:202–9.

Tilman, D., Kilham, S. S., and Kilham, P. (1976). Morphometric changes in Asterionella formosa colonies: phosphate and silicate limitation. Limnol. Oceanogr. 21:883–6.

Venrich, E. L., McGowan, J. A., and Mantyla, A. W. (1973). Deep maxima of photosynthetic chlorophyll in the Pacific Ocean. Fish. Bull. 71:41–52.

Villareal, T. A. (1989). Division cycles in the nitro- gen-fixing Rhizosolenia (Bacillariophyceae)–Richelia (Nostocaceae) symbiosis. Br. Phycol. J. 24:357–65.

Villareal, T. A., and Carpenter, E. J. (1994). Chemical composition and photosynthetic characteristics of Ethmodiscus rex (Bacillariophyceae): evidence for vertical migration. J. Phycol. 30:1–8.

von Denffer, D. (1949). Die planktonische Massenkultur pennatur Grunddiatomeen. Arch. Mikrobiol. 14:159–202.

von Stosch, H. A. (1951). Entwicklungsgeschichtliche Untersuchungen an zentrischen Diatomeen. I. Die Auxosporenbildung von Melosira varians. Arch.

Mikrobiol. 16:101–35.

von Stosch, H. A. (1975). An amended terminology of the diatom girdle. Nova Hedwigia, Beih. 53:1–28.

von Stosch, H. A. (1982). On auxospore envelopes in diatoms. Bacillaria 5:127–48.

von Stosch, H. A., and Fecher, K. (1979). “Internal thecae” of Eunotia soleirolii (Bacillariophyceae): Development, structure and function as resting spores. J. Phycol. 15:233–43.

Vrieling, E. G., Gieskes, W. W. C., and Beelen, T. P. M. (1999). Silicon deposition in diatoms: control by the pH inside the silicon deposition vesicle. J. Phycol. 35:548–59.

Wagner, J. (1934). Beuträge zur Kenntnis der Nitzschia putrida Benecke, insbesonders ihrer Bewegung. Arch. Protistenk. 82:86–113.

Wang, Y., Chen, Y., Lain, C., and Gretz, M. R. (2000). Extracellular matrix assembly in diatoms (Bacillariophyceae). IV. Ultrastructure of Achnanthes longipes and Cymbella cistula as revealed by highpressure freezing/freeze substitution and cryo-field emission scanning electron microscopy. J. Phycol. 36:367–78.

Wetherbee, R., Crawford, S., and Mulvaney, P. (2004). The nanostructure and development of diatom biosilica. In Biomineralization Progress Biology, Molecular Biology and Application, ed. E. Baeuerlein, pp. 177–93. Weinheim: Wiley-VCH.

White, A. W. (1974). Growth of two facultatively heterotrophic marine centric diatoms. J. Phycol. 10:292–300.

Wilson, D. P. (1946). The triradiate and other forms of Nitzschia closterium (Ehrenberg) Wm. Smith, forma minutissima of Allen and Nelson. J. Mar. Biol. Assn., U.K. 26:235–70.