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Differential effects of nutrient availability on the secondary metabolism of Austrian pine (Pinus nigra) phloem and resistance to Diplodia pinea

Citation

Wallis, C and Eyles, A and Chorbadjian, R and Riedl, K and Schwartz, S and Hansen, R and Cipollini, D and Herms, D and Bonello, P, Differential effects of nutrient availability on the secondary metabolism of Austrian pine (Pinus nigra) phloem and resistance to Diplodia pinea, Forest Pathology, 41, (1) pp. 52-58. ISSN 1437-4781 (2011) [Refereed Article]

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The definitive published version is available online at: http://onlinelibrary.wiley.com/

Official URL: http://onlinelibrary.wiley.com/

DOI: doi:10.1111/j.1439-0329.2009.00636.x

Abstract

Nutrient availability can modulate the incidence and severity of plant diseases. We examined the effects of fertility on (i) host resistance and (ii) secondary metabolite production in the Pinus nigra Arnold Diplodia pinea (Desm.) Kickx pathosystem. Following preconditioning of trees to one of three fertility levels for one growing season, phloem tissue of one branch was harvested for chemical analyses while another branch on the same whorl was inoculated with the fungus to assess resistance. Nutrient availability had concave and convex quadratic effects on concentrations of total monoterpenes and total phenolics respectively, but had no effect on fungal lesion lengths. Lesion lengths were negatively correlated with lignin, suggesting that this compound is an important factor in resistance. Counteracting effects of nutrient availability on phenolic and terpenoid pathways may explain why fertility had no effect on expression of disease resistance.

Item Details

Item Type:Refereed Article
Keywords:nutrient availability, metabolism, Austrian pine,Pinus nigra, phloem, Diplodia pinea
Research Division:Agricultural and Veterinary Sciences
Research Group:Forestry Sciences
Research Field:Forestry Pests, Health and Diseases
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Hardwood Plantations
Author:Eyles, A (Dr Alieta Eyles)
ID Code:59020
Year Published:2011
Web of Science® Times Cited:12
Deposited By:Agricultural Science
Deposited On:2009-11-13
Last Modified:2017-11-08
Downloads:0

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