Soybean seed lectin, Le1, is specifically located in seeds of soybean, Glycine max, (L.) Merr., due to its promoter. Gene homologues of Le1 were previously identified as possibly located in other parts of soybean. We cloned two novel promoters from these genes, and show that they drive reporter gene expression in transgenic Arabidopsis. A total of 1.3kb was isolated from each of the Le2 and Le3 5' promoter regions and fused with the GUS reporter gene. A previously cloned Le1 5' promoter was used as a control and the constructs were introduced into Arabidospis. GUS expression in transformed plants reveals that GUS driven by Le3 is found predominantly in vegetative tissues whereas GUS driven by Le2 show low expression in all tissues examined. The expression patterns resulting from the three different lectin promoters are distinct and consistent with regulatory motifs computationally identified in the sequences. / Chez le soja (Glycine max), le promoteur du gene lectine Le1 dirige l'expression spécifique dans les graines. Des homologues de Le1 existent dans le genome du soja et sont exprimées ailleurs dans la plante. Nous avons isolé deux promoteurs de ces homologues de lectine, et décrivons le patron d'expression qu'ils dirigent. Un total de 1.3 kilobase des regions 5' des promoteurs, en amont du gène, a été isolé pour chacune des copies Le2 et Le3, et fusionné avec le gène rapporteur GUS. Le promoteur de Le1 étant déjà connu, il sert de controle. L'Arabidopsis transformée avec ces constructions, montre que le promoteur de Le3 dirige l'expression dans les tissues végétatifs, tandis que le promoteur de Le2 procure un niveau minimal d'expression dans tous les tissus examinés. De plus, des analyses bioinformatiques identifient des motifs spécifiques dans les sequences de promoteurs qui confirment les patrons d'expression que nous avons démontrés.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.18806 |
| Date | January 2008 |
| Creators | Saeed, Hanaa |
| Contributors | Martina Stromvik (Supervisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | French |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science (Department of Plant Science) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | Electronically-submitted theses. |
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