Studies on chloroplast development in Chlamydomonas reinhardtii
نویسندگان
چکیده
منابع مشابه
Ribosomes Bound to Chloroplast Membranes in Chlamydomonas Reinhardtii
The amount of chloroplast ribosomal RNAs of Chlamydomonas reinhardtii which sediment at 15,000 g is increased when cells are treated with chloramphenicol. Preparations of chloroplast membranes from chloramphenicol-treated cells contain more chloroplast ribosomal RNAs than preparations from untreated cells. The membranes from treated cells also contain more ribosome-like particles, some of which...
متن کاملBiogenic membranes of the chloroplast in Chlamydomonas reinhardtii.
The polypeptide subunits of the photosynthetic electron transport complexes in plants and algae are encoded by two genomes. Nuclear genome-encoded subunits are synthesized in the cytoplasm by 80S ribosomes, imported across the chloroplast envelope, and assembled with the subunits that are encoded by the plastid genome. Plastid genome-encoded subunits are synthesized by 70S chloroplast ribosomes...
متن کاملIdentification of a new chloroplast carbonic anhydrase in Chlamydomonas reinhardtii.
Carbonic anhydrases (CA) are zinc-containing metalloenzymes that catalyze the reversible hydration of CO2. The three evolutionarily unrelated families of CAs are designated alpha-, beta-, and gamma-CA. Aquatic photosynthetic organisms have evolved different forms of CO2 concentrating mechanisms (CCMs) to aid Rubisco in capturing CO2 from the surrounding environment. One aspect of all CCMs is th...
متن کاملAttachment of chloroplast polysomes to thylakoid membranes in Chlamydomonas reinhardtii.
Treatment of synchronous cultures of Chlamydomonas reinhardtii with chloramphenicol at 4 hr after the beginning of the light phase led to a preferential loss of 70S ribosomes from the 17,000 x g(max) supernate. The "lost" 70S ribosomes were found associated with a thylakoid membrane fraction prepared from the 17,000 x g(max) pellet. Electron microscopic examinations of this fraction revealed th...
متن کاملChloroplast DNA replication is regulated by the redox state independently of chloroplast division in Chlamydomonas reinhardtii.
Chloroplasts arose from a cyanobacterial endosymbiont and multiply by division. In algal cells, chloroplast division is regulated by the cell cycle so as to occur only once, in the S phase. Chloroplasts possess multiple copies of their own genome that must be replicated during chloroplast proliferation. In order to examine how chloroplast DNA replication is regulated in the green alga Chlamydom...
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ژورنال
عنوان ژورنال: Biochimica et Biophysica Acta (BBA) - Nucleic Acids and Protein Synthesis
سال: 1974
ISSN: 0005-2787
DOI: 10.1016/0005-2787(74)90316-5