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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Nishimura, Rieko Fujita, Hironori Kawaguchi, Masayoshi Ohmori, Masayuki |
| Description | Author Affiliation: Nishimura R ( Department of Life Science, Graduate School of Arts and Sciences, University of Tokyo, Komaba, Meguro-ku, Japan.); |
| Abstract | The developmental program of nodulation is regulated systemically in leguminous host species. A mutant astray (Ljsym77) in Lotus japonicus has lost some sort of its ability to regulate this symtem, and shows enhanced and early nodulation. In the absence of rhizobia, this mutant exhibits characteristics associated with defects in light and gravity responses. These nonsymbiotic phenotypes of astray are very similar to those observed in photomorphogenic Arabidopsis mutant hy5. Based on this evidence, we predicted that astray might contain a mutation in the HY5 homologue of L. japonicus. The homologue, named LjBzf, encodes a basic leucine zipper protein in the C-terminal half that shows the highest level of identity with HY5 of all Arabidopsis proteins. It also encodes legume-characteristic combination of motifs, including a RING-finger motif and an acidic region in the N-terminal half. The astray phenotypes were cosegregated with LjBzf, and the failure to splice the intron was detected. Nonsymbiotic and symbiotic phenotypes of astray were complemented by introduction of CaMV35SLjBzf. It is noteworthy that although Arabidopsis hy5 showed an enhancement of lateral root initiation, Lotus astray showed an enhancement of nodule initiation but not of lateral root initiation. Legume-characteristic combination of motifs of ASTRAY may play specific roles in the regulation of nodule development. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 23 |
| Volume Number | 99 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2002-11-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Arabidopsis Proteins Leucine Zippers Physiology Nuclear Proteins Genetics Plant Proteins Amino Acid Sequence Basic-Leucine Zipper Transcription Factors DNA Primers Gene Expression Regulation, Developmental Gene Expression Regulation, Plant Genetic Vectors Glucuronidase Hypocotyl Growth & Development Molecular Sequence Data Plant Roots Plants, Genetically Modified Polymorphism, Genetic Reverse Transcriptase Polymerase Chain Reaction Sequence Alignment Sequence Homology, Amino Acid Symbiosis Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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