1
|
Shi L, Wei XJ, Adedze YMN, Sheng ZH, Tang SQ, Hu PS, Wang JL. Characterization and gene cloning of the rice (Oryza sativa L.) dwarf and narrow-leaf mutant dnl3. Genet Mol Res 2016; 15:gmr8731. [PMID: 27706742 DOI: 10.4238/gmr.15038731] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The dwarf and narrow-leaf rice (Oryza sativa L.) mutant dnl3 was isolated from the Japonica cultivar Zhonghua 11 (wild-type). dnl3 exhibited pleiotropic developmental defects. The narrow-leaf phenotype resulted from a marked reduction in the number of vascular bundles, while the dwarf stature was caused by the formation of foreshortened internodes and a reduced number of parenchyma cells. The suggestion that cell division is impaired in the mutant was consistent with the transcriptional behavior of various genes associated with cell division. The mutant was less responsive to exogenously supplied gibberellic acid than the wild-type, and profiling the transcription of genes involved in gibberellin synthesis and response revealed that a lesion in the mutant affected gibberellin signal transduction. The dnl3 phenotype was inherited as a single-dominant gene, mapping within a 19.1-kb region of chromosome 12, which was found to harbor three open reading frames. Resequencing the open reading frames revealed that the mutant carried an allele at one of the three genes that differed from the wild-type sequence by 2-bp deletions; this gene encoded a cellulose synthase-like D4 (CSLD4) protein. Therefore, OsCSLD4 is a candidate gene for DNL3. DNL3 was expressed in all of the rice organs tested at the heading stage, particularly in the leaves, roots, and culms. These results suggest that DNL3 plays important roles in rice leaf morphogenesis and vegetative development.
Collapse
Affiliation(s)
- L Shi
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops, Hunan Agriculture University, Changsha, China.,Chinese National Center for Rice Improvement, State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - X J Wei
- Chinese National Center for Rice Improvement, State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Y M N Adedze
- Chinese National Center for Rice Improvement, State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Z H Sheng
- Chinese National Center for Rice Improvement, State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - S Q Tang
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops, Hunan Agriculture University, Changsha, China.,Chinese National Center for Rice Improvement, State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - P S Hu
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops, Hunan Agriculture University, Changsha, China.,Chinese National Center for Rice Improvement, State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - J L Wang
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops, Hunan Agriculture University, Changsha, China
| |
Collapse
|