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Organellar gene tra...
Organellar gene transcription and early seedling development are affected in the rpoT;2 mutant of Arabidopsis.
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Baba, Kyoko (author)
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Schmidt, Julien (author)
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Espinosa-Ruiz, Ana (author)
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Villarejo, Arsenio (author)
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Shiina, Takashi (author)
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- Gardeström, Per (author)
- Umeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC)
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Sane, Aniruddha P (author)
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- Bhalerao, Rishikesh P (author)
- Umeå universitet,Umeå Plant Science Centre (UPSC)
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(creator_code:org_t)
- 2004
- 2004
- English.
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In: Plant J. - 0960-7412. ; 38:1, s. 38-48
- Related links:
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http://www.ncbi.nlm....
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- An Arabidopsis mutant that exhibited reduced root length was isolated from a population of activation-tagged T-DNA insertion lines in a screen for aberrant root growth. This mutant also exhibited reduced hypocotyl length as well as a delay in greening and altered leaf shape. Molecular genetic analysis of the mutant indicated a single T-DNA insertion in the gene RpoT;2 encoding a homolog of the phage-type RNA polymerase (RNAP), that is targeted to both mitochondria and plastids. A second T-DNA-tagged allele also showed a similar phenotype. The mutation in RpoT;2 affected the light-induced accumulation of several plastid mRNAs and proteins and resulted in a lower photosynthetic efficiency. In contrast to the alterations in the plastid gene expression, no major effect of the rpoT;2 mutation on the accumulation of examined mitochondrial gene transcripts and proteins was observed. The rpoT;2 mutant exhibited tissue-specific alterations in the transcript levels of two other organelle-directed nuclear-encoded RNAPs, RpoT;1 and RpoT;3. This suggests the existence of cross-talk between the regulatory pathways of the three RNAPs through organelle to nucleus communication. These data provide an important information on a role of RpoT;2 in plastid gene expression and early plant development.
Keyword
- Arabidopsis/*genetics/*growth & development/metabolism
- Arabidopsis Proteins/metabolism
- Base Sequence
- DNA Transposable Elements/genetics
- DNA; Bacterial/genetics
- DNA; Plant/genetics
- DNA-Directed RNA Polymerases/genetics
- Gene Expression Regulation; Developmental
- Gene Expression Regulation; Plant
- Genes; Plant
- Mitochondria/genetics
- Mutagenesis; Insertional
- Mutation
- Organelles/genetics
- Photosystem II Protein Complex/metabolism
- Plastids/genetics
- Seedling/growth & development
Publication and Content Type
- ref (subject category)
- art (subject category)
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