Seasonal Variation of Oleoresin Terpenoids from Pinus halepensis and Pinus pinea and Host Selection of the Scale Insect Marchalina hellenica (Homoptera, Coccoidea, Margarodidae, Coelostonidiinae)
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Summary
Seasonal variation of the volatile terpenoids of Pinus pinea Ten and Pinus halepensis Mill, infested and uninfested by the caterpillar Marchalina hellenica, was followed by GC and GC-MS analyses of the pines cortical oleoresin. α-Pinene was found to be the dominant monoterpene in P. halepensis, while in P. pinea limonene was the most abundant compound. A significant decrease in the number of identified volatiles from winter to summer was observed and was more pronounced in the minor metabolites. Variation of the terpenoids according to the depth of the draining (drilling) holes in the trees was also determined. In addition, terpenoids were correlated with the results of cross feeding experiments designed for the study of the host preference of M. hellenica. All results revealed the dependence of M. hellenica on the secondary chemistry of the host. P. pinea, having a high content of limonene, appears to be more resistant to the caterpillar. Canonical discriminant analysis, in the discriminant space of the relative contribution of the ten major terpenes, separated P. pinea from P. halepensis, and infested from uninfested P. halepensis trees.
Copyright © 2002 by Walter de Gruyter GmbH & Co. KG
Articles in the same Issue
- Subject Index
- Author Index
- Contents
- Species Index
- Molecular Identity of Species and Isolates of the Coniphora Cellar Fungi
- Seasonal Variation of Oleoresin Terpenoids from Pinus halepensis and Pinus pinea and Host Selection of the Scale Insect Marchalina hellenica (Homoptera, Coccoidea, Margarodidae, Coelostonidiinae)
- Modification of Spruce Lignans with Trametes hirsuta Laccase
- Formation of 13C-Enriched Cell-Wall DHP Using Isolated Soft Xylem from Picea abies
- Alkaline Hydrolysis of Nonphenolic β-0-4 Lignin Models: Substituent Effect of the A-Ring on the Rate
- Photosensitized Delignification of Residual Lignin and Chemical Pulp from Eucalyptus grandis Wood
- New Method to Follow the Dimerisation Reaction Occuring during Oxidation of 4-Ethylguaiacol
- Methylation Analysis as a Tool for Structural Analysis of Wood Polysaccharides
- Surface Chemistry of Eucalyptus Wood Pulp Fibres: Effects of Chemical Pulping
- Delignification Mechanism during High-Boiling Solvent Pulping. Part 2. Homolysis of Guaiacylglycerol-β-Guaiacyl Ether
- The Further Chemistry of Ellagic Acid III: The Effect of Wick Action upon Moisture Uptake and Movement in Ellagate Treated Pinus radiata Wood
- Influence of Heat and Loading Time on the Mechanical Properties of Calamus merrillii Becc.
- Magnetic Resonance Studies of Thermally Modified Wood
- Dielectric Relaxation Based on Adsorbed Water in Wood Cell Wall under Non-Equilibrium State. Part 3. Desorption
- Influence of Coating Additives on Water Vapour Absorption and Desorption in Norway Spruce
- In situ Longitudinal Tensile Tests of Pine Wood in an Environmental Scanning Electron Microscope
- Literature Reports
Articles in the same Issue
- Subject Index
- Author Index
- Contents
- Species Index
- Molecular Identity of Species and Isolates of the Coniphora Cellar Fungi
- Seasonal Variation of Oleoresin Terpenoids from Pinus halepensis and Pinus pinea and Host Selection of the Scale Insect Marchalina hellenica (Homoptera, Coccoidea, Margarodidae, Coelostonidiinae)
- Modification of Spruce Lignans with Trametes hirsuta Laccase
- Formation of 13C-Enriched Cell-Wall DHP Using Isolated Soft Xylem from Picea abies
- Alkaline Hydrolysis of Nonphenolic β-0-4 Lignin Models: Substituent Effect of the A-Ring on the Rate
- Photosensitized Delignification of Residual Lignin and Chemical Pulp from Eucalyptus grandis Wood
- New Method to Follow the Dimerisation Reaction Occuring during Oxidation of 4-Ethylguaiacol
- Methylation Analysis as a Tool for Structural Analysis of Wood Polysaccharides
- Surface Chemistry of Eucalyptus Wood Pulp Fibres: Effects of Chemical Pulping
- Delignification Mechanism during High-Boiling Solvent Pulping. Part 2. Homolysis of Guaiacylglycerol-β-Guaiacyl Ether
- The Further Chemistry of Ellagic Acid III: The Effect of Wick Action upon Moisture Uptake and Movement in Ellagate Treated Pinus radiata Wood
- Influence of Heat and Loading Time on the Mechanical Properties of Calamus merrillii Becc.
- Magnetic Resonance Studies of Thermally Modified Wood
- Dielectric Relaxation Based on Adsorbed Water in Wood Cell Wall under Non-Equilibrium State. Part 3. Desorption
- Influence of Coating Additives on Water Vapour Absorption and Desorption in Norway Spruce
- In situ Longitudinal Tensile Tests of Pine Wood in an Environmental Scanning Electron Microscope
- Literature Reports
