The Onset of 70S Chloroplast Ribosome Formation is Determined by an Early Heat-Sensitive Stage in the Ontogeny of Rye Leaves : GROWTH AND DEVELTOPMENT : ENVIRONMENTAL AND STRESS RESPONSES

スポンサーリンク

概要

• 論文の詳細を見る

• The formation of plastidic 70S ribosomes can be specifically eliminated in developing leaves of rye (Secale cereale L.) when seedlings are continuously grown at an elevated temperature of 32℃. Labeling experiments with [^<35>S]methionine and [^3H]uridine have indicated that in fully differentiated leaf tissue grown under permissive conditions (22℃) exposure to 32℃ did not impair current 70S ribosome biosynthesis. Neither the synthesis or processing of plastidic rRNA nor the synthesis and integration of proteins into 70S ribosomes were directly affected. However, when the leaves were grown at 32℃, the young tissue of the basal growing zone that had been newly formed during a 24 h or longer heat exposure appeared to become unable to assemble and accumulate 70S ribosomes, whereas all ribosomal constituents that were examined were still present. Complete plastid ribosomes were thus progressively diluted out. This heat-sensitivity indicates the existence of an early step in the differentiation of leaf cells which controls the expres-sion of some limiting factor for plastid ribosome formation or assembly. The expression of plastid ribosome constituents was not tightly coregulated. Only after prolonged and extensive depletion of 70S ribosomes were plastidic transcripts (rRNA) diminished and several ribosomal proteins lost. Several nuclear-encoded ribosomal proteins and the transcript for the nuclear-encoded protein L12 were maintained at high levels in 70S ribosome-deficient leaf sections.

• 日本植物生理学会の論文

著者

• Berberich T

  Graduate School Of Life Sciences Tohoku University

• Berberich Thomas

  Batanicshes Institut, J.W. Goethe-Universitat, Siesmayerstrasse

• Feierabend Jurgen

  Batanicshes Institut, J.W. Goethe-Universitat, Siesmayerstrasse

• Berberich Thomas

  Graduate School Of Life Sciences Tohoku University

• Feierabend Jurgen

  Batanicshes Institut J.w. Goethe-universitat Siesmayerstrasse

関連論文

• NtbZIP60, an endoplasmic reticulum-localized transcription factor, plays a role in the defense response against bacterial pathogens in Nicotiana tabacum
• Characterization of AtbZIP2, AtbZIP11 and AtbZIP53 from the group S basic region-leucine zipper family in Arabidopsis thaliana
• LIP19, a Basic Region Leucine Zipper Protein, is a Fos-like Molecular Switch in the Cold Signaling of Rice Plants
• Ntdin, a Tobacco Senescence-Associated Gene, is Involved in Molybdenum Cofactor Biosynthesis
• ポリアミン研究における進展
• The Onset of 70S Chloroplast Ribosome Formation is Determined by an Early Heat-Sensitive Stage in the Ontogeny of Rye Leaves : GROWTH AND DEVELTOPMENT : ENVIRONMENTAL AND STRESS RESPONSES
• Spatio-temporal expression analysis of Arabidopsis thaliana spermine synthase gene promoter
• Identification and properties of a small protein that interacts with a tobacco bZIP-type transcription factor TBZF

スポンサーリンク