An alkaline extract of the brown seaweed, Ascophyllum nodosum (ANE) increases plant
growth and imparts resistance against biotic stresses. However, little is known of the
effects of ANE on insects. Myzus persicae, green peach aphid (GPA), and Arabidopsis
model were used to determine whether application of ANE confers protection from GPA
infestation. GPA colonization increased in ANE treated plants, associated with improved
biomass. However, ANE treated plants exhibited less cell death and also showed a
greater ability to recover from GPA injury. Lower expression of SAG13, SAG21 and
CHL1 and a higher expression of ARR5 was observed in ANE treated plants. Taken
together, gene expression along with lower cell death suggests ANE may delay
senescence in Arabidopsis. Delayed senescence in Arabidopsis following ANE treatment may be a result of increased cytokinin activity. Increased GPA numbers could be, at least in part, due to delayed senescence in Arabidopsis following ANE treatment.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:NSHD.ca#10222/15239 |
| Date | 15 May 2012 |
| Creators | Weeraddana, Chaminda De Silva |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Thesis |
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