Symbioses and Stress: Joint Ventures in Biology (Cellular Origin, Life in Extreme Habitats and Astrobiology)
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Symbioses and Stress examines how organisms in tight symbiotic associations cope with abiotic and biotic stress. Presenting new findings on symbioses by experts and leading scholars in the field, this volume complements courses and lectures in biology and genetics.
and both regularly (e.g., seasonal changes) and irregularly (e.g., rainfall), or slowly (e.g., global climatic shifts). Deviations from a presumably optimal stage impose stress on any of the partners in a symbiotic system, which will also influence interactions among the organisms. Apart from the stress imposed on the symbiotic systems, colonization with a symbiont itself can include induction of a latent or chronic stress response in the hosting organism. This leads to the beneficial priming
possible that the nucleus experiences further gene transfer from the newly acquired endosymbiont followed by gene replacement of the originals. Indeed, such is the case with the phylogeny of oxygen-evolving enhancer 1 (PsbO) in the dinoflagellate Karenia brevis (Ishida and Green, 2002). Dinoflagellates are also not limited to replacing their original plastid with a chromalveolate one. Lepidodinium viride has a plastid most likely derived from a green alga (Watanabe et al., 1990). Such an
molecular basis of the metabolic flexibility of Galdieria sulphuraria and significant differences in carbohydrate metabolism of both algae. Plant Physiol. 137: 460–474. Bhattacharya, D. and Melkonian, M. (1995) The phylogeny of plastids: a review based on comparisons of small-subunit ribosomal RNA coding regions. J. Phycol. 31: 489–498. Bhattacharya, D., Archibald, J.M., Weber, A.P. and Reyes-Prieto, A. (2007). How do endosymbionts become organelles? Understanding early events in plastid
the DNA synthesis via recombination of its DNA with the DNA of the partner. After repairing and restarting the DNA synthesis, the replication of both haploid sets would be completed resulting in a tetraploid entity. Now the cell division would be allowed to produce two diploid pre-karyotes. These would, however, “feel” that they have DNA-replicated and would have no need to start the DNA synthesis. Instead, both diploid pre-karyotes would be allowed to divide to produce haploid prekaryotes.
Lamellibrachia and Escarpia, for example). Physiological properties of vestimentiferans have been first and most studied (Arp and Childress, 1981, 1983; Felbeck et al., 1981, 2004). Closely related to vestimentiferan are the moniliferan Sclerolinum worms, which feed on dead and decaying wood and other organic matter (Halanych et al., 2001). Basal to the vestimentiferan/Sclerolinum linage is the Osedax worms, the recently discovered whale-bone eaters that harbor not autotrophic but heterotrophic