Characterization of a rice chlorophyll-deficient mutant using the T-DNA gene-trap system
SCIE
SCOPUS
- Title
- Characterization of a rice chlorophyll-deficient mutant using the T-DNA gene-trap system
- Authors
- Jung, KH; Hur, J; Ryu, CH; Choi, Y; Chung, YY; Miyao, A; Hirochika, H; An, GH
- Date Issued
- 2003-05
- Publisher
- OXFORD UNIV PRESS
- Abstract
- We have previously generated a large pool of T-DNA insertional lines in rice. In this study, we screened those TDNA pools for rice mutants that had defective chlorophylls. Among the 1,995 lines examined in the T2 generation, 189 showed a chlorophyll-deficient phenotype that segregated as a single recessive locus. Among the mutants, 10 lines were P-glucuronidase (GUS)-positive in the leaves. Line 9-07117 has a T-DNA insertion into the gene that is highly homologous to XANTHA-F in barley and CHLH in Arabidopsis. This OsCHLH gene encodes the largest subunit of the rice Mg-chelatase, a key enzyme in the chlorophyll branch of the tetrapyrrole biosynthetic pathway. In the T2 and T3 generations, the chlorina mutant phenotypes are co-segregated with the T-DNA. We have identified two additional chlorina mutants that have a Tos17 insertion in the OsCHLH gene. Those phenotypes were cosegregated with Tos17 in the progeny. GUS assays and RNA blot analysis showed that expression of the OsCHLH gene is light inducible, while TEM analysis revealed that the thylakoid membrane of the mutant chloroplasts is underdeveloped. The chlorophyll content was very low in the OschlH mutants. This is the first report that T-DNA insertional mutagenesis can be used for functional analysis of rice genes.
- Keywords
- chlorina; GUS; light inducible; magnesium chelatase; Oryza sativa; T-DNA; MG-CHELATASE; MAGNESIUM CHELATASE; ARABIDOPSIS-THALIANA; FUNCTIONAL GENOMICS; CHL-I; PROTOPORPHYRIN-IX; STRUCTURAL GENES; XANTHA-G; SUBUNIT; EXPRESSION
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/18521
- DOI
- 10.1093/pcp/pcg064
- ISSN
- 0032-0781
- Article Type
- Article
- Citation
- PLANT AND CELL PHYSIOLOGY, vol. 44, no. 5, page. 463 - 472, 2003-05
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.