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Discoordination of ribosomal RNA metabolism during metabolic shifts of Spirodela plants
Year:
1977
Authors :
Rosner, Arie
;
.
Volume :
474
Co-Authors:
Rosner, A., Department of Plant Genetics, The Weizmann Institute of Science, Rehovot, Israel
Gressel, J., Department of Plant Genetics, The Weizmann Institute of Science, Rehovot, Israel
Jakob, K.M., Department of Plant Genetics, The Weizmann Institute of Science, Rehovot, Israel
Facilitators :
From page:
386
To page:
397
(
Total pages:
12
)
Abstract:
The effects of metabolic shifts on nucleic acid syntheses have been widely studied in prokaryotes, but not in plants because of a paucity of suitable systems. Spirodela (Duckweed) was thus used to ascertain the response of the nucleocytoplasmic (nc) and plastid ribosomal RNA metabolisms to partial and total carbon deprivation. The 0.56 × 106 Mm plastid rRNA is the one species of RNA most affected by metabolic shifts; unlike other species, its appearance is delayed by deprivation and it appears more rapidly than other species on transfer from dark to light. The data suggest a discoordination between the transcription and processing of plastid ribosomal precursors. Incorporation into all nc and plastid rRNAs was severely reduced and all rRNA precursors accumulated in green plants that were completely deprived of carbon by transferring to the dark, without sucrose. The amounts of nc and plastid precursors transcribed readjusted to the reduced amounts processed to mature RNA only after long periods in the dark with sucrose. This delay involved the formation of new colorless plants. Less plastid RNAs, compared to nc RNAs are found in the dark steady state. © 1977.
Note:
Related Files :
Chloroplasts
darkness
in vitro study
Kinetics
light
plant
Plants
ribosome RNA
RNA, Ribosomal
sucrose
theoretical study
Time Factors
Show More
Related Content
More details
DOI :
10.1016/0005-2787(77)90268-4
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
27995
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:35
Scientific Publication
Discoordination of ribosomal RNA metabolism during metabolic shifts of Spirodela plants
474
Rosner, A., Department of Plant Genetics, The Weizmann Institute of Science, Rehovot, Israel
Gressel, J., Department of Plant Genetics, The Weizmann Institute of Science, Rehovot, Israel
Jakob, K.M., Department of Plant Genetics, The Weizmann Institute of Science, Rehovot, Israel
Discoordination of ribosomal RNA metabolism during metabolic shifts of Spirodela plants
The effects of metabolic shifts on nucleic acid syntheses have been widely studied in prokaryotes, but not in plants because of a paucity of suitable systems. Spirodela (Duckweed) was thus used to ascertain the response of the nucleocytoplasmic (nc) and plastid ribosomal RNA metabolisms to partial and total carbon deprivation. The 0.56 × 106 Mm plastid rRNA is the one species of RNA most affected by metabolic shifts; unlike other species, its appearance is delayed by deprivation and it appears more rapidly than other species on transfer from dark to light. The data suggest a discoordination between the transcription and processing of plastid ribosomal precursors. Incorporation into all nc and plastid rRNAs was severely reduced and all rRNA precursors accumulated in green plants that were completely deprived of carbon by transferring to the dark, without sucrose. The amounts of nc and plastid precursors transcribed readjusted to the reduced amounts processed to mature RNA only after long periods in the dark with sucrose. This delay involved the formation of new colorless plants. Less plastid RNAs, compared to nc RNAs are found in the dark steady state. © 1977.
Scientific Publication
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