Tissue-specific fatty acid composition of glandular trichomes of mite- resistant and -susceptible Pelargonium xhortorum

R. A. Grazzini, P. R. Paul, T. Hage, Diana Lynn Cox-foster, J. I. Medford, R. Craig, R. O. Mumma

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Anacardic acids, alkyl phenolic acids excreted by tall glandular trichomes of the garden geranium, Pelargonium xhortorum, confer small-pest resistance. Up to 90% of the trichome exudate from mite-resistant P. xhortorum inbreds consists of an unusual anacardic acid with an unsaturated omega-5 (ω5) alkyl chain. As fatty acids are biochemical precursors to anacardic acids, we examined by GC the fatty acid composition of leaves, pedicels, petals, sepals, mature seeds, and glandular trichomes from pest- resistant and pest-susceptible Pelargonium inbred lines to determine the localization of ω5-fatty acids within plant tissues. The fatty acid composition of lipid classes (galactolipids, phospholipids, and neutral lipids)extracted from glandular trichomes from mite-resistant pedicels were also examined. ω5-Fatty acids (16: 1Δ11 and 18: 1Δ13) were found only in the glandular trichomes from pest-resistant geraniums (27.2% in trichomes of pedicels) and were localized predominantly in the phospho- and galactolipids (phosphatidylinositol, 25.9%; phosphatidylcholine, 18.2%; monogalactosyldiglyceride, 15.5%; and diglactosyldiglyceride, 14.0%).

Original languageEnglish (US)
Pages (from-to)955-968
Number of pages14
JournalJournal of Chemical Ecology
Volume25
Issue number4
DOIs
StatePublished - Jan 1 1999

Fingerprint

Pelargonium
Pelargonium hortorum
Trichomes
trichome
Mites
mite
trichomes
mites
Fatty Acids
fatty acid
fatty acid composition
Anacardic Acids
Tissue
Galactolipids
pedicel
Chemical analysis
galactolipids
acid
pests
fatty acids

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Biochemistry

Cite this

Grazzini, R. A., Paul, P. R., Hage, T., Cox-foster, D. L., Medford, J. I., Craig, R., & Mumma, R. O. (1999). Tissue-specific fatty acid composition of glandular trichomes of mite- resistant and -susceptible Pelargonium xhortorum. Journal of Chemical Ecology, 25(4), 955-968. https://doi.org/10.1023/A:1020865322035
Grazzini, R. A. ; Paul, P. R. ; Hage, T. ; Cox-foster, Diana Lynn ; Medford, J. I. ; Craig, R. ; Mumma, R. O. / Tissue-specific fatty acid composition of glandular trichomes of mite- resistant and -susceptible Pelargonium xhortorum. In: Journal of Chemical Ecology. 1999 ; Vol. 25, No. 4. pp. 955-968.
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Grazzini, RA, Paul, PR, Hage, T, Cox-foster, DL, Medford, JI, Craig, R & Mumma, RO 1999, 'Tissue-specific fatty acid composition of glandular trichomes of mite- resistant and -susceptible Pelargonium xhortorum', Journal of Chemical Ecology, vol. 25, no. 4, pp. 955-968. https://doi.org/10.1023/A:1020865322035

Tissue-specific fatty acid composition of glandular trichomes of mite- resistant and -susceptible Pelargonium xhortorum. / Grazzini, R. A.; Paul, P. R.; Hage, T.; Cox-foster, Diana Lynn; Medford, J. I.; Craig, R.; Mumma, R. O.

In: Journal of Chemical Ecology, Vol. 25, No. 4, 01.01.1999, p. 955-968.

Research output: Contribution to journalArticle

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T1 - Tissue-specific fatty acid composition of glandular trichomes of mite- resistant and -susceptible Pelargonium xhortorum

AU - Grazzini, R. A.

AU - Paul, P. R.

AU - Hage, T.

AU - Cox-foster, Diana Lynn

AU - Medford, J. I.

AU - Craig, R.

AU - Mumma, R. O.

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N2 - Anacardic acids, alkyl phenolic acids excreted by tall glandular trichomes of the garden geranium, Pelargonium xhortorum, confer small-pest resistance. Up to 90% of the trichome exudate from mite-resistant P. xhortorum inbreds consists of an unusual anacardic acid with an unsaturated omega-5 (ω5) alkyl chain. As fatty acids are biochemical precursors to anacardic acids, we examined by GC the fatty acid composition of leaves, pedicels, petals, sepals, mature seeds, and glandular trichomes from pest- resistant and pest-susceptible Pelargonium inbred lines to determine the localization of ω5-fatty acids within plant tissues. The fatty acid composition of lipid classes (galactolipids, phospholipids, and neutral lipids)extracted from glandular trichomes from mite-resistant pedicels were also examined. ω5-Fatty acids (16: 1Δ11 and 18: 1Δ13) were found only in the glandular trichomes from pest-resistant geraniums (27.2% in trichomes of pedicels) and were localized predominantly in the phospho- and galactolipids (phosphatidylinositol, 25.9%; phosphatidylcholine, 18.2%; monogalactosyldiglyceride, 15.5%; and diglactosyldiglyceride, 14.0%).

AB - Anacardic acids, alkyl phenolic acids excreted by tall glandular trichomes of the garden geranium, Pelargonium xhortorum, confer small-pest resistance. Up to 90% of the trichome exudate from mite-resistant P. xhortorum inbreds consists of an unusual anacardic acid with an unsaturated omega-5 (ω5) alkyl chain. As fatty acids are biochemical precursors to anacardic acids, we examined by GC the fatty acid composition of leaves, pedicels, petals, sepals, mature seeds, and glandular trichomes from pest- resistant and pest-susceptible Pelargonium inbred lines to determine the localization of ω5-fatty acids within plant tissues. The fatty acid composition of lipid classes (galactolipids, phospholipids, and neutral lipids)extracted from glandular trichomes from mite-resistant pedicels were also examined. ω5-Fatty acids (16: 1Δ11 and 18: 1Δ13) were found only in the glandular trichomes from pest-resistant geraniums (27.2% in trichomes of pedicels) and were localized predominantly in the phospho- and galactolipids (phosphatidylinositol, 25.9%; phosphatidylcholine, 18.2%; monogalactosyldiglyceride, 15.5%; and diglactosyldiglyceride, 14.0%).

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