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פותח על ידי קלירמאש פתרונות בע"מ -
Chirality of israeli pine bast scale, Matsucoccus josephi (homoptera: Matsucoccidae) sex pheromone
Year:
1995
Source of publication :
Journal of Chemical Ecology
Authors :
דונקלבלום, עזרא
;
.
מנדל, צבי
;
.
Volume :
21
Co-Authors:
Dunkelblum, E., Institute of Plant Protection, Volcani Center, Bet Dagar, 50250, Israel
Gries, R., Centre for Pest Management, Department of Biological Sciences, Simon Fraser University, Burnaby, V5A 1S6, British Columbia, Canada
Gries, G., Centre for Pest Management, Department of Biological Sciences, Simon Fraser University, Burnaby, V5A 1S6, British Columbia, Canada
Mori, K., Department of Agricultural Chemistry, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo, 113, Japan
Mendel, Z., Institute of Plant Protection, Volcani Center, Bet Dagar, 50250, Israel
Facilitators :
From page:
849
To page:
858
(
Total pages:
10
)
Abstract:
The absolute configuration of the sex pheromone of the Israeli pine bast scale, Matsucoccus josephi, was determined as (2 E,5 R,6 E,8 E)-5,7-dimethyl-2,6,8-decatrien-4-one, designated here as R-E with 10% (2 E,5 S,6 E,8 E)-5,7-dimethyl-2,6,8-decatrien-4-one, designated as S-E. The chirality of the quantitatively minor Z isomer was (2 E,5 R,6 Z,8 E)-5,7-dimethyl-2,6,8-decatrien-4-one (R-Z). Chiral assignments were made by comparative gas chromatographic (GC) analysis of natural M. josephi pheromone with stereoselectively synthesized stereoisomers on a chiral Cyclodex-B column, which separated the enantiomers with baseline resolution. In gas chromatographic-electroantennographic detection (GC-EAD) analysis of the racemic Z and E isomers, the latter elicited the stronger antennal response by male M. josephi. In GC-EAD of all four stereoisomers, employing the chiral column, R-E was the most active stereoisomer. In field tests R-E attracted 10 times more males of M. josephi than did S-E. The racemic E/Z pheromone mixture, containing all four stereoisomers in approximately equal amounts, attracted as many male M. josephi as did an equivalent amount of R-E, indicating that the other stereoisomers are not inhibitory. The same keto-diene moiety with the same chiral center and configuration in all three known Matsucoccidae sex pheromones implies a common biosynthetic pathway and phylogenetic relationship. © 1995 Plenum Publishing Corporation.
Note:
Related Files :
(2 E,5 R,6 E,8 E)-5,7-dimethyl-2,6,8-decatrien-4-one
Coccoidae
Homoptera
Matsucoccidae
sex pheromone
עוד תגיות
תוכן קשור
More details
DOI :
10.1007/BF02033465
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
31284
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:01
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Scientific Publication
Chirality of israeli pine bast scale, Matsucoccus josephi (homoptera: Matsucoccidae) sex pheromone
21
Dunkelblum, E., Institute of Plant Protection, Volcani Center, Bet Dagar, 50250, Israel
Gries, R., Centre for Pest Management, Department of Biological Sciences, Simon Fraser University, Burnaby, V5A 1S6, British Columbia, Canada
Gries, G., Centre for Pest Management, Department of Biological Sciences, Simon Fraser University, Burnaby, V5A 1S6, British Columbia, Canada
Mori, K., Department of Agricultural Chemistry, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo, 113, Japan
Mendel, Z., Institute of Plant Protection, Volcani Center, Bet Dagar, 50250, Israel
Chirality of israeli pine bast scale, Matsucoccus josephi (homoptera: Matsucoccidae) sex pheromone
The absolute configuration of the sex pheromone of the Israeli pine bast scale, Matsucoccus josephi, was determined as (2 E,5 R,6 E,8 E)-5,7-dimethyl-2,6,8-decatrien-4-one, designated here as R-E with 10% (2 E,5 S,6 E,8 E)-5,7-dimethyl-2,6,8-decatrien-4-one, designated as S-E. The chirality of the quantitatively minor Z isomer was (2 E,5 R,6 Z,8 E)-5,7-dimethyl-2,6,8-decatrien-4-one (R-Z). Chiral assignments were made by comparative gas chromatographic (GC) analysis of natural M. josephi pheromone with stereoselectively synthesized stereoisomers on a chiral Cyclodex-B column, which separated the enantiomers with baseline resolution. In gas chromatographic-electroantennographic detection (GC-EAD) analysis of the racemic Z and E isomers, the latter elicited the stronger antennal response by male M. josephi. In GC-EAD of all four stereoisomers, employing the chiral column, R-E was the most active stereoisomer. In field tests R-E attracted 10 times more males of M. josephi than did S-E. The racemic E/Z pheromone mixture, containing all four stereoisomers in approximately equal amounts, attracted as many male M. josephi as did an equivalent amount of R-E, indicating that the other stereoisomers are not inhibitory. The same keto-diene moiety with the same chiral center and configuration in all three known Matsucoccidae sex pheromones implies a common biosynthetic pathway and phylogenetic relationship. © 1995 Plenum Publishing Corporation.
Scientific Publication
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