Rice MtN3/saliva/SWEET gene family: Evolution, expression profiling, and sugar transport
The rice MtN3/saliva/SWEET gene family consists of 21 paralogs. However, their functions in physiological processes are largely unknown, although at least three of the 21 paralogs are used by pathogenic bacteria to infect rice. Here, we report the evolutionary features, transcriptional characteristi...
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Published in | Journal of integrative plant biology Vol. 56; no. 6; pp. 559 - 570 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
China (Republic : 1949- )
Chinese Academy of Sciences
01.06.2014
Blackwell Publishing Ltd National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research Wuhan, Huazhong Agricultural University, Wuhan 430070, China |
Subjects | |
Online Access | Get full text |
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Summary: | The rice MtN3/saliva/SWEET gene family consists of 21 paralogs. However, their functions in physiological processes are largely unknown, although at least three of the 21 paralogs are used by pathogenic bacteria to infect rice. Here, we report the evolutionary features, transcriptional characteristics, and putative functions in sugar transport of this gene family. The wild rice accessions in this study included those with AA, BB, CC, BBCC, CCDD, EE, and GG genomes, which appeared approximately 0.58–14.6 million years ago. The structures, chromosomal locations, phylogenetic relationships, and homologous distribution among the accessions suggest that the number of rice MtN3/saliva/SWEET paralogs gradually increased as the Oryza genus evolved, and one third of the paralogs may have originated recently. These paralogs are differentially expressed in vegetative and reproductive tissues, in the leaf senescence process, and in signaling dependent on gibberellic acid, cytokinin, or 1‐naphthalene acetic acid (an analog of auxin), suggesting that they may be associated with multiple physiological processes. Four paralogs could transport galactose in yeast, which suggests that they may have a similar function in rice. These results will help to elucidate their roles and biochemical functions in rice development, adaptation to environment, host‐pathogen interaction, and so forth. |
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Bibliography: | The rice MtN3/saliva/SWEET gene family consists of 21 paralogs. However, their functions in physiological processes are largely unknown, although at least three of the 21 paralogs are used by pathogenic bacteria to infect rice. Here, we report the evolutionary features, transcriptional characteristics, and putative functions in sugar transport of this gene family. The wild rice accessions in this study included those with AA, BB, CC, BBCC, CCDD, EE, and GG genomes, which appeared approximately 0.58-14.6 million years ago. The structures, chromosomal locations, phylogenetic relationships, and homologous distribution among the accessions suggest that the number of rice MtN3/saliva/SWEET paralogs gradual y increased as the Oryza genus evolved, and one third of the paralogs may have originated recently. These paralogs are differentially expressed in vegetative and reproductive tissues, in the leaf senescence process, and in signaling dependent on gibberel ic acid, cytokinin, or 1-naphthalene acetic acid (an analog of auxin), suggesting that they may be associated with multiple physiological processes. Four paralogs could transport galactose in yeast, which suggests that they may have a similar function in rice. These results will help to elucidate their roles and biochemical functions in rice development, adaptation to environment, host-pathogen interaction, and so forth. 11-5067/Q Evolution; MtN3/saliva domain; Oryza sotivo; transporter http://dx.doi.org/10.1111/jipb.12173 National Program of High Technology Development of China - No. 2012AA10A303 istex:91C1D38F62D9D1630BEFC906C23FF10264300B8F National Natural Science Foundation of China - No. J1103510 ArticleID:JIPB12173 ark:/67375/WNG-PPZ1Q1NZ-B Fundamental Research Funds for the Central Universities - No. 2011QC068 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1 |
ISSN: | 1672-9072 1744-7909 |
DOI: | 10.1111/jipb.12173 |