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Characterization of a trehalose-6-phosphate synthase gene from Spodoptera exigua and its function identification through RNA interference
- Source :
- Journal of insect physiology. 56(7)
- Publication Year :
- 2009
-
Abstract
- Trehalose is an important disaccharide and a key regulation factor for the development of many organisms, including plants, bacteria, fungi and insects. In order to study the trehalose synthesis pathway, a cDNA for a trehalose-6-phosphate synthase from Spodoptera exigua (SeTPS) was cloned which contained an open reading frame of 2481 nucleotides encoding a protein of 826 amino acids with a predicted molecular weight of 92.65 kDa. The SeTPS genome has 12 exons and 11 introns. Northern blot and RT-PCR analyses showed that SeTPS mRNA was expressed in the fat body and in the ovary. Competitive RT-PCR revealed that SeTPS mRNA was expressed in the fat body at different developmental stages and was present at a high level in day 1 S. exigua pupae. The concentrations of trehalose and glucose in the hemolymph were determined by HPLC and showed that they varied at different developmental stages and were negatively correlated to each other. The survival rates of the insects injected with dsRNA corresponding to SeTPS gene reached 53.95%, 49.06%, 34.86% and 33.24% for 36, 48, 60 and 204 h post-injection respectively which were significantly lower than those of the insects in three control groups. These findings provide new data on the tissue distribution, expression patterns and potential function of the trehalose-6-phosphate synthase gene.
- Subjects :
- Physiology
Molecular Sequence Data
Spodoptera
chemistry.chemical_compound
Exon
Exigua
Hemolymph
Gene expression
Animals
Northern blot
Amino Acid Sequence
Gene
Phylogeny
biology
Base Sequence
fungi
Trehalose
Exons
biology.organism_classification
Molecular biology
Introns
Biochemistry
chemistry
Glucosyltransferases
Insect Science
Insect Proteins
RNA Interference
Sequence Alignment
Subjects
Details
- ISSN :
- 18791611
- Volume :
- 56
- Issue :
- 7
- Database :
- OpenAIRE
- Journal :
- Journal of insect physiology
- Accession number :
- edsair.doi.dedup.....0129aac0bf4291a4e8490504e98dddfd