A novel orfB-related gene of carrot mitochondrial genomes that is associated with homeotic cytoplasmic male sterility (CMS)

A novel orfB-related gene of carrot mitochondrial genomes that is associated with homeotic... Three types of orfB-related genes, orfB-F1, orfB-F2 and orfB-CMS, were found in carrot mitochondrial genomes. OrfB-F1 has a structure similar to the reported orfB gene in sunflower, and orfB-F2 is a novel chimeric gene with about 200 bp of unknown sequence at the 3′ end of the orfB-related sequence. All fertile plants examined contained either orfB-F1 or orfB-F2. OrfB-CMS is also a novel chimeric orfB-related gene with an additional 170 bp of unknown sequence at the 3′ end. Fifteen carrot lines including petaloid CMS were examined by PCR analysis and all petaloid CMS plants were found to contain the orfB-CMS gene. The orfB-F2 and orfB-CMS genes coexist in three lines, and these lines exhibit a CMS phenotype, suggesting that the CMS phenotype is associated with orfB-CMS and is independent of the presence of orfB-F2. Interestingly, differences in predicted amino acid sequence between orfB-CMS and orfB-F2 were very limited and restricted to the carboxy-terminal region of the protein. The orfB-related genes were transcribed as expected from their DNA structures, but orfB-CMS protein accumulated only in floral organs of the CMS lines. Four RNA editing sites were common to orfB-CMS and orfB-F2, and C-to-U editing occurred in both floral and leaf organs for orfB-CMS. These results strongly suggest that the orfB-CMS gene is closely associated with the petaloid phenotype and its expression is not regulated by RNA editing, but by post-transcriptional events. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Plant Molecular Biology Springer Journals

A novel orfB-related gene of carrot mitochondrial genomes that is associated with homeotic cytoplasmic male sterility (CMS)

Loading next page...
 
/lp/springer_journal/a-novel-orfb-related-gene-of-carrot-mitochondrial-genomes-that-is-0U8cI1DoCA
Publisher
Kluwer Academic Publishers
Copyright
Copyright © 2001 by Kluwer Academic Publishers
Subject
Life Sciences; Biochemistry, general; Plant Sciences; Plant Pathology
ISSN
0167-4412
eISSN
1573-5028
D.O.I.
10.1023/A:1010652118518
Publisher site
See Article on Publisher Site

Abstract

Three types of orfB-related genes, orfB-F1, orfB-F2 and orfB-CMS, were found in carrot mitochondrial genomes. OrfB-F1 has a structure similar to the reported orfB gene in sunflower, and orfB-F2 is a novel chimeric gene with about 200 bp of unknown sequence at the 3′ end of the orfB-related sequence. All fertile plants examined contained either orfB-F1 or orfB-F2. OrfB-CMS is also a novel chimeric orfB-related gene with an additional 170 bp of unknown sequence at the 3′ end. Fifteen carrot lines including petaloid CMS were examined by PCR analysis and all petaloid CMS plants were found to contain the orfB-CMS gene. The orfB-F2 and orfB-CMS genes coexist in three lines, and these lines exhibit a CMS phenotype, suggesting that the CMS phenotype is associated with orfB-CMS and is independent of the presence of orfB-F2. Interestingly, differences in predicted amino acid sequence between orfB-CMS and orfB-F2 were very limited and restricted to the carboxy-terminal region of the protein. The orfB-related genes were transcribed as expected from their DNA structures, but orfB-CMS protein accumulated only in floral organs of the CMS lines. Four RNA editing sites were common to orfB-CMS and orfB-F2, and C-to-U editing occurred in both floral and leaf organs for orfB-CMS. These results strongly suggest that the orfB-CMS gene is closely associated with the petaloid phenotype and its expression is not regulated by RNA editing, but by post-transcriptional events.

Journal

Plant Molecular BiologySpringer Journals

Published: Oct 3, 2004

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve Freelancer

DeepDyve Pro

Price
FREE
$49/month

$360/year
Save searches from Google Scholar, PubMed
Create lists to organize your research
Export lists, citations
Read DeepDyve articles
Abstract access only
Unlimited access to over
18 million full-text articles
Print
20 pages/month
PDF Discount
20% off