Correlation between bean seed surface lipids and Acanthoscelides obtectus Say development
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University of Warmia and Mazury, Department of Phytopathology and Entomology Prawocheńskiego 17, 10-722 Olsztyn, Poland
University of Gdańsk, Department of Chemistry Sobieskiego 18, 80-952 Gdańsk, Poland
University of Warmia and Mazury, Department of Plant Food Chemistry and Processing
Journal of Plant Protection Research 2005;45(2):125–133
The influence of bean seed surface lipids on infestation of seeds by Acanthoscelides obtectus Say was investigated. The experiments were performed in dual-choice bioassays on three bean varieties: Blanka, Bor and Longina. The collected data for natural and solvent washed seeds concerned the number of ovipositions, embryo mortality, lack of seed-boring activity, dead larvae inside seeds and developed insects. The results clearly indicated that bean seed surface lipids are involved in all infestation stages, and could be used to distinguish resistant and non-resistant varieties of been. Chemical analyses revealed the following groups of surface lipids: wax esters, long chain primary alcohols, n-alkanes, sterols, fatty acids, squalene, aldehydes, monoacylglycerols, ketones and fatty acid esters. Quantitative composition of surface lipids was analysed using selected chemometric procedures to determine correlation with bioactivity. Cluster analysis of surface lipid composition enabled to distinguish resistant and non-resistant varieties. Fatty acids and monoacylglycerols were found to deter bean weevil infestation, while alkan-1-ols acted as attractants.
The authors have declared that no conflict of interests exist.
Mariusz Nietupski
University of Warmia and Mazury, Department of Phytopathology and Entomology Prawocheńskiego 17, 10-722 Olsztyn, Poland
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