Rubisco surprises in dinoflagellates.
نویسنده
چکیده
منابع مشابه
Continued evolutionary surprises among dinoflagellates.
I t is well established that chloroplasts in green and red algae are derived from a primary endosymbiotic event between a cyanobacterium and a eukaryotic organism 1 billion years ago (Fig. 1; refs. 1 and 2). Although these two groups account for many of the world’s photosynthetic species, most other major taxonomic groups of photosynthetic organisms (stramenopiles—including diatoms, phaeophytes...
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Genes encoding ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) were cloned from dinoflagellate symbionts (Symbiodinium spp) of the giant clam Tridacna gigas and characterized. Strikingly, Symbiodinium Rubisco is completely different from other eukaryotic (form I) Rubiscos: it is a form II enzyme that is approximately 65% identical to Rubisco from Rhodospirillum rubrum (Rubisco forms I...
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Phosphorus (P) is an essential nutrient element for the growth of phytoplankton. How P deficiency affects population growth and the cell division cycle in dinoflagellates has only been studied in some species, and how it affects photosynthesis and cell growth remains poorly understood. In the present study, we investigated the impact of P deficiency on the cell division cycle, the abundance of ...
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The accumulation of inorganic carbon from seawater by eukaryotic marine phytoplankton is limited by the diffusion of carbon dioxide (CO2) in water and the dehydration kinetics of bicarbonate to CO2 and by ribulose-1,5-bisphosphate carboxylase/oxygenase's (RubisCO) low affinity for its inorganic carbon substrate, CO2. Nearly all marine phytoplankton have adapted to these limitations and evolved ...
متن کاملEvidence for an inorganic carbon-concentrating mechanism in the symbiotic dinoflagellate Symbiodinium sp.
The presence of a carbon-concentrating mechanism in the symbiotic dinoflagellate Symbiodinium sp. was investigated. Its existence was postulated to explain how these algae fix inorganic carbon (C(i)) efficiently despite the presence of a form II Rubisco. When the dinoflagellates were isolated from their host, the giant clam (Tridacna gigas), CO(2) uptake was found to support the majority of net...
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ورودعنوان ژورنال:
- The Plant cell
دوره 8 3 شماره
صفحات -
تاریخ انتشار 1996