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Effects of Fertilization and Fungal and Insect Attack on Systemic Protein Defenses of Austrian Pine


Barto, K and Enright, S and Eyles, A and Wallis, C and Chorbadjian, R and Hansen, R and Herms, DA and Bonello, P and Cipollini, D, Effects of Fertilization and Fungal and Insect Attack on Systemic Protein Defenses of Austrian Pine, Journal of Chemical Ecology, 34, (11) pp. 1392-1400. ISSN 0098-0331 (2008) [Refereed Article]

DOI: doi:10.1007/s10886-008-9550-z


Despite their economic and ecological importance, defense responses of conifers to pests are little understood. In a 3-year experiment, we monitored systemic fungal (Diplodia pinea)- and insect (Neodiprion sertifer)-induced defense protein activities and total soluble proteins in needles and phloem of Austrian pine (Pinus nigra) across a soil fertility gradient. In both years, total soluble protein content of foliage and phloem declined with increasing fertility across induction treatments, while defensive protein activities generally increased with increasing fertility. In 2005, total soluble protein content in branch phloem was increased by fungal inoculation of the stem. Peroxidase activity was suppressed in needles by insect defoliation in 2006, while polyphenol oxidase activity was systemically induced in branch phloem by insect attack in 2005. Trypsin inhibitor activities in phloem did not respond to any induction or fertility treatment. Nutritive quality of Austrian pine tissue declined with increasing fertility, while several protein-based defenses simultaneously increased. © 2008 Springer Science+Business Media, LLC.

Item Details

Item Type:Refereed Article
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Forestry sciences
Research Field:Forest health and pathology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Softwood plantations
UTAS Author:Eyles, A (Dr Alieta Eyles)
ID Code:46727
Year Published:2008
Web of Science® Times Cited:14
Deposited By:Agricultural Science
Deposited On:2008-08-01
Last Modified:2008-11-13

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