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Giant RNA in insects I. Differential changes during Calliphora development and the role of ecdysone
Year:
1976
Authors :
Shaaya, Eli
;
.
Volume :
447
Co-Authors:
Shaaya, E., Laboratory of Insect Physiology, Terra Santa, The Hebrew University of Jerusalem, Israel
Facilitators :
From page:
395
To page:
405
(
Total pages:
11
)
Abstract:
The pattern of newly synthesized RNA in the epidermis cells of Calliphora during the larval life to the early pupal stage was analysed by electrophoretic separation of RNA extracts on polyacrylamide gels. During larval life, mainly rRNA was synthesized. The elevation of ecdysone concentration during the synthesis of the new larval cuticle resulted primarily in the stimulation of rRNA synthesis. In the transition period from larva to pupa, the principal RNA synthesized was rapidly labelled giant DNA-like RNA, with an average life span of 30 min. Prior to the change in RNA metabolism at this development stage, the synthesis of all classes of RNA was depressed. The initial increase in hnRNA synthesis occurs at the onset of the wandering stage, shortly after the appearance of a small peak of ecdysone and about two days prior to the main peak of hormone secretion and pupariation. During induced pupariation by ecdysterone, 1 h after hormone treatment, more label was observed in giant hnRNA followed by elevation of rRNA synthesis. Processing and maturation of rRNA also seemed to be stimulated. © 1976.
Note:
Related Files :
Animal
Diptera
ecdysone
ecdysterone
larva
Metamorphosis, Biological
pupa
RNA
skin
Show More
Related Content
More details
DOI :
10.1016/0005-2787(76)90077-0
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
21304
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:43
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Scientific Publication
Giant RNA in insects I. Differential changes during Calliphora development and the role of ecdysone
447
Shaaya, E., Laboratory of Insect Physiology, Terra Santa, The Hebrew University of Jerusalem, Israel
Giant RNA in insects I. Differential changes during Calliphora development and the role of ecdysone
The pattern of newly synthesized RNA in the epidermis cells of Calliphora during the larval life to the early pupal stage was analysed by electrophoretic separation of RNA extracts on polyacrylamide gels. During larval life, mainly rRNA was synthesized. The elevation of ecdysone concentration during the synthesis of the new larval cuticle resulted primarily in the stimulation of rRNA synthesis. In the transition period from larva to pupa, the principal RNA synthesized was rapidly labelled giant DNA-like RNA, with an average life span of 30 min. Prior to the change in RNA metabolism at this development stage, the synthesis of all classes of RNA was depressed. The initial increase in hnRNA synthesis occurs at the onset of the wandering stage, shortly after the appearance of a small peak of ecdysone and about two days prior to the main peak of hormone secretion and pupariation. During induced pupariation by ecdysterone, 1 h after hormone treatment, more label was observed in giant hnRNA followed by elevation of rRNA synthesis. Processing and maturation of rRNA also seemed to be stimulated. © 1976.
Scientific Publication
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