Riftia pachyptila

Fig.1 The chitin-secreting gland of the marine worm Riftia pachyptila. Part 1 the central lumen (7, upper-right corner) contains the amorphous chitin secretion (c) the suh-lumen marked with an arrow is emptying its content in the central lumen. Part 2 chitin mi-crofihrils sections (c) the filamentous network (arrows) that connects the edges of the crystallite sections, seems to contain protein (From ShUlito et al., in Chitin Enzymology, Vol. 1, R.A.A. Muzzarelli (ed.) pp. 129-136, Atec, Italy, 1993)...

Internal structure of the tube worm Riftia pachyptila. (a) Oxygen, sulfide, and carbon dioxide are absorbed through the plume filaments and transported In the blood to the cells of the trophosome. (b) The chemicals are absorbed into these cells, which contain dense colonies of sulfur bacteria, where they are converted to organic compounds and (c) passed back into the circulatory system to act as an energy source for the worms. Source-. From Childress, J. J., et al. (1987). Scientific American, 256, 114-121. 

Figure 7.23. Effects of temperature on mitochondrial function. (Upper panel). Arrhenius plot illustrating the slope discontinuity ( break ) that commonly occurs at a high temperature of measurement, the Arrhenius break temperature (ABT). Data are for mitochondria of the hydrothermal vent tubeworm Riftia pachyptila (after Dahlhoff et al., 1991). (Lower panel) Arrhenius break temperatures for mitochondrial respiration of diverse invertebrates and fishes. The open square is for mitochondrial respiration of the Antarctic nototheniid fish Trematomus bernacchii and is not included in the regression analysis. A line of identify (ABT = adaptation temperature) is also shown (see text for analysis). (Data from Dahlhoff and Somero, 1993b Dahlhoff et ah, 1991 Weinstein and Somero, 1998.)...

Robinson and colleagues (2003) explored the properties of rubisco from the bacterial endosym-biont of the giant tube worm Riftia pachyptila. Rubisco, from any source, catalyzes the reaction of either C02 (Fig. 20-7) or 02 (Fig. 20-20) with ribulose 1,5-bisphosphate. In general, rubisco reacts more readily with C02 than 02. The degree of selectivity (IT) can be expressed as... 

Robinson, J.J., Scott, K.M., Swanson, S.T., O Leary, M.H., Horken, K., Tabita, F.R., Cavanaugh, C.M. (2003) Kinetic isotope effect and characterization of form II RubisCO from the chemoautotrophic endosymbionts of the hydrothermal vent tubeworm Riftia pachyptila. Limnol. Oceanogr. 48, 48-54. 

Arp AJ, Doyle ML, DiCera E, Gill SJ. Oxygenation properties of the two co-occuring hemoglobins of the tube worm Riftia pachyptila. Respir. Physiol. 1990 80 323-334. 

Goffredi SK, Childress JJ, Desaulniers NT, Lallier FJ. Sulfide ac- 55. quisition by the vent worm Riftia pachyptila appears to be via uptake of HS-, rather than H2S. J. Exp. Biol. 1997 200 2609-2616. 

Felbeck H, Jarchow J. Carbon release from purified chemoau-totrophic bacterial symbionts of the hydrothermal vent tubeworm 61. Riftia pachyptila. Physiol. Zook 1998 71 294-302. 

Hentschel U, Felbeck H. Nitrate respiration in the hydrothermal 62. vent tubeworm Riftia pachyptila. Nature 1993 366 338-340. 

Minic Z, Simon V, Penverne B, Gaill F, Herve G. Contribution 64. of the bacterial endosymbiont to the biosynthesis of pyrimidine nucleotides in the deep-sea tube worm Riftia pachyptila. J. Biol. 

Robinson J. J., Stein J. L., and Cavanaugh C. M. (1998) Cloning and sequencing of a Form II Ribulose-l,5-Bispho-sphate Carboxylase/Oxygenase from the bacterial symbiont of the hydrothermal vent tubeworm Riftia pachyptila. J. Bacterial. 180, 1596-1599. 

Cavanaugh C. M., Gardiner S. L., Jones M. L., Jannasch H. W., and Waterbury J. B. (1981) Prokaryotic cells in the hydrothermal vent mbe worm Riftia pachyptila Jones possible chemoautotrophic symbionts. Science 213, 340-342. 

Riftia pachyptila Trophosome Guaymas basin, NW Mexico 22.2 Ruelas-Inzunza et al. (2005)... 

Sterols also seem to have been studied only for a small number of species. Sterols of Nereis succinea and Riftia pachyptila are of the usual kind. For Riftia pachyptila, the cumulated contents of brassicasterol, campesterol and... 

Zal, F. (1999) Riftia pachyptila le vergeantdes abysses. Les frontieres du vivant. La Recherche, Special Issue, February, 90-95. 

Zal, F., Lallier, F.H., Wall, J.S., Vinogradov, S.N., and Toulmond, A. (1996a) The multi-hemoglobin system of the hydrothermal vent tube worm Riftia pachyptila 1. Reexamination of the number and masses of its constituents./. Biol Chem., 271,8869-8874. 

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