Green leaf volatiles

Fig. 3 Biosynthetic pathways to pyrethrins. The identified enzymes involved in biosynthesis are shown in orange. Note that green leaf volatiles and the plant hormone jasmonic acid share the oxylipin pathway. The phosphate moiety is indicated as P ...

Beetles are attracted by volatiles of several solanaceous plants (27). The collection and characterization of compounds emanating from potato plants resulted In the Identification of general green leaf volatiles such as hexanol, hexenols and hexenal, which elicit a positive response (28). But the specific compounds that enable the Insects to recognize their solanaceous hosts still remain a mystery. 

Ramachandran, R. and Norris, D. M. (1991). Volatiles mediating plant-herbivore-natural enemy interactions electroantennogram responses of soybean looper, Pseudoplusia includens, and a parasitoid, Microplitis demolitor, to green leaf volatiles. Journal of Chemical Ecology 17 1665-1690. 

Hansson, B. S., Larsson, M.D. and Leal, W. S. (1999). Green leaf volatile-detecting olfactory receptor neurones display very high sensitivity and specificity in a scarab beetle. Physiological Entomology 24 121-126. 

Nikonov A. A., Valiyaveettil J. T. and Leal W. S. (2001) A photoaffinity-labeled green leaf volatile compound tricks highly selective and sensitive insect olfactory receptor neurons. Chem. Senses 26, 49-54. 

Can anything be deduced from the range of stimuli that evoke strong responses Some of these compounds are well-known stimuli for insect ORNs. The green leaf volatile E2-hexenal is detected by many plant feeders (Visser, 1986), 4-methylphenol is known as an attractant for tsetse flies (Den Otter and Van der Goes van Naters, 1993) and methylsalicylate is a product typically produced by... 

Cyclopentenoid Fatty Acids Fluoro Fatty Acids Other Unusual Lipids Metabolically Altered Fatty Acids The Green Leaf Volatile Complex Functions of Fatty Acids and Their Derivatives in Plants Jasmonic Acid and Related Compounds The Requirement for Unsaturated Fatty Acids in the Diet of Animals... 

Fig. 2.23. Proposed biosynthesis of green leaf volatile complex.

VissER, J. H. and D. A. Ave, General green leaf Volatiles in the olfactory orientation of the Colorado beetle, Leptinotarsa de-cemlineata, Ent. Exp. Appl., 24, 538-549 (1978). 

Whitman, D. W. and F. J. Eller, Parasitic wasps orient to green leaf volatiles, Chemoecology, 1, 69-75 (1990). 

Although there is a common view that isothiocyanates are important odor components of intact brassicaceous plants, field levels are extremely low and are usually below the level of detection of the usual analytical techniques. The principal vapor component of turnip and radish is hexenyl acetate see Chapter 2). Even in the case of disrupted tissue of cauliflower, turnip, radish, and wallflower (Alyssum), the principal component was Z-hex-3-enyl acetate (Wallbank and Wheatley, 1976). These data suggest that green leaf volatiles may be involved in the attraction of many species of insects to cruciferous plants. 

GLVs. See Green leaf volatiles (GLVs) Glyceollin II, 1569... 

Farag MA, Pard PW (2002) C -Green leaf volatiles trigger local and systemic VOC emissions in tomato. Phytochemistry 61 545-554... 

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