Role of salinity in the susceptibility of eelgrass Zostera marina to the wasting disease pathogen Labyrinthula zosterae
2008; Inter-Research; Volume: 377; Linguagem: Inglês
10.3354/meps07860
ISSN1616-1599
Autores Tópico(s)Coastal wetland ecosystem dynamics
ResumoMEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 377:123-130 (2009) - DOI: https://doi.org/10.3354/meps07860 Role of salinity in the susceptibility of eelgrass Zostera marina to the wasting disease pathogen Labyrinthula zosterae Katie L. McKone, Christopher E. Tanner* Department of Biology, 18952 E. Fisher Rd., St. Mary's College of Maryland, St. Mary's City, Maryland 20686, USA *Corresponding author. Email: cetanner@smcm.edu ABSTRACT: Eelgrass wasting disease, caused by the net-forming protist Labyrinthula zosterae, is suspected as the causative agent in the North Atlantic population declines of the temperate seagrass Zostera marina in the 1930s, as well as in more recent localized die-offs. During these declines, populations of eelgrass in low salinity areas were less likely to decline and quicker to recover. The goal of this study was to understand the relationships between eelgrass wasting disease and salinity, and how phenolic acids, putative plant defense compounds, varied with salinity and infection. We studied these relationships through mesocosm experiments in which eelgrass shoots were inoculated with L. zosterae under different salinity treatments (5, 10, 15, 25 and 40). We used lesion area as a measure of the degree of infection. Phenolic acids were separated and quantified with reversed phase HPLC. Three phenolic acids, rosmarinic, gallic and ferulic, were identified in leaf and rhizome tissue. Lesion area decreased with a decrease in salinity, and the concentration of phenolic acids increased with lesion area in inoculated leaves. Concentrations of phenolic acids were not good predictors of resistance to L. zosterae infection. Our study supports the hypothesis that observed decreases in eelgrass wasting disease in low salinity areas are due to the inhibition of L. zosterae at lower salinities. KEY WORDS: Eelgrass · Zostera marina · Wasting disease · Labyrinthula · Salinity · Phenolic acid Full text in pdf format PreviousNextCite this article as: McKone KL, Tanner CE (2009) Role of salinity in the susceptibility of eelgrass Zostera marina to the wasting disease pathogen Labyrinthula zosterae. Mar Ecol Prog Ser 377:123-130. https://doi.org/10.3354/meps07860 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 377. Online publication date: February 26, 2009 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2009 Inter-Research.
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