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Chemistry and geographic variation of floral scent in Yucca filamentosa (Agavaceae)

Svensson, Glenn LU ; Hickman, MO; Bartram, S; Boland, W; Pellmyr, Olle and Raguso, Robert A (2005) In American Journal of Botany 92(10). p.1624-1631
Abstract
We identified volatiles from the floral headspace of Yucca filamentosa using gas chromatography and mass spectrometry and analyzed floral scent composition and variation among populations pollinated by different yucca moth species. Twenty-one scent compounds were repeatedly identified and most could be categorized into two major classes: (1) homoterpenes derived from the sesquiterpene alcohol nerolidol and (2) long chain aliphatic hydrocarbons. Two biosynthetic pathways are thus responsible for the majority of floral volatiles in Y. filamentosa. The homoterpene E-4,8-dimethylnona-1,3,7-triene, which is released systemically by higher plants upon herbivory, was the most abundant compound. Two di-oxygenated compounds not previously reported... (More)
We identified volatiles from the floral headspace of Yucca filamentosa using gas chromatography and mass spectrometry and analyzed floral scent composition and variation among populations pollinated by different yucca moth species. Twenty-one scent compounds were repeatedly identified and most could be categorized into two major classes: (1) homoterpenes derived from the sesquiterpene alcohol nerolidol and (2) long chain aliphatic hydrocarbons. Two biosynthetic pathways are thus responsible for the majority of floral volatiles in Y. filamentosa. The homoterpene E-4,8-dimethylnona-1,3,7-triene, which is released systemically by higher plants upon herbivory, was the most abundant compound. Two di-oxygenated compounds not previously reported as floral compounds also were detected. No differentiation in floral scent was observed between populations pollinated by different yucca moths, nor was there any correlation between chemical distance and geographic distance among populations. The total release rate of volatiles differed significantly among populations, but not between populations with different pollinators. The combination of unique compounds and low variation in the fragrance blend may reflect highly selective attraction of obligate pollinators to flowers. The observed lack of differentiation in floral scent can putatively explain high moth-mediated gene flow among sites, but it does not explain conservation of odor composition across populations with different pollinators. (Less)
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author
organization
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Contribution to journal
publication status
published
subject
in
American Journal of Botany
volume
92
issue
10
pages
1624 - 1631
publisher
Botanical Society of America
external identifiers
  • wos:000232356800003
ISSN
0002-9122
project
Chemical ecology of obligate pollination mutualisms
language
English
LU publication?
yes
id
1a3e4757-7100-49c7-a0b5-5ca7cea9cba8 (old id 146102)
alternative location
http://www.amjbot.org/cgi/content/full/92/10/1624
date added to LUP
2007-06-27 12:43:36
date last changed
2016-04-16 04:00:48
@article{1a3e4757-7100-49c7-a0b5-5ca7cea9cba8,
  abstract     = {We identified volatiles from the floral headspace of Yucca filamentosa using gas chromatography and mass spectrometry and analyzed floral scent composition and variation among populations pollinated by different yucca moth species. Twenty-one scent compounds were repeatedly identified and most could be categorized into two major classes: (1) homoterpenes derived from the sesquiterpene alcohol nerolidol and (2) long chain aliphatic hydrocarbons. Two biosynthetic pathways are thus responsible for the majority of floral volatiles in Y. filamentosa. The homoterpene E-4,8-dimethylnona-1,3,7-triene, which is released systemically by higher plants upon herbivory, was the most abundant compound. Two di-oxygenated compounds not previously reported as floral compounds also were detected. No differentiation in floral scent was observed between populations pollinated by different yucca moths, nor was there any correlation between chemical distance and geographic distance among populations. The total release rate of volatiles differed significantly among populations, but not between populations with different pollinators. The combination of unique compounds and low variation in the fragrance blend may reflect highly selective attraction of obligate pollinators to flowers. The observed lack of differentiation in floral scent can putatively explain high moth-mediated gene flow among sites, but it does not explain conservation of odor composition across populations with different pollinators.},
  author       = {Svensson, Glenn and Hickman, MO and Bartram, S and Boland, W and Pellmyr, Olle and Raguso, Robert A},
  issn         = {0002-9122},
  language     = {eng},
  number       = {10},
  pages        = {1624--1631},
  publisher    = {Botanical Society of America},
  series       = {American Journal of Botany},
  title        = {Chemistry and geographic variation of floral scent in <i>Yucca filamentosa</i> (Agavaceae)},
  volume       = {92},
  year         = {2005},
}