Diversity of volatile organic compound emissions from flowering and vegetative branches of Yeheb, <i>Cordeauxia edulis</i> (Caesalpiniaceae), a threatened evergreen desert shrub

Ibrahim, Mohamed; Egigu, Meseret C.; Kasurinen, Anne; Yahya, Asha; Holopainen, Jarmo K.

doi:10.1002/ffj.1971

Cited by 22 publications

(20 citation statements)

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“…The increased nocturnal emissions of methyl salicylate in P. digitalis flowers may function to repel night active ants; however, we have not observed nocturnal visitors to these flowers. Although part of the daily variation in scent emission can be a physical consequence of light intensity, day length, and temperature (Hendel-Rahmarim et al 2007;Ibrahim et al 2010;Kesselmeier and Staudt 1999), variation of volatiles under strong selection, such as S-(+)-linalool, suggests diel regulation with possible ecological functions.…”

Section: Discussionmentioning

confidence: 98%

Spatiotemporal Floral Scent Variation of Penstemon digitalis

et al. 2015

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Variability in floral volatile emissions can occur temporally through floral development, during diel cycles, as well as spatially within a flower. These spatiotemporal patterns are hypothesized to provide additional information to floral visitors, but they are rarely measured, and their attendant hypotheses are even more rarely tested. In Penstemon digitalis, a plant whose floral scent has been shown to be under strong phenotypic selection for seed fitness, we investigated spatiotemporal variation in floral scent by using dynamic headspace collection, respectively solid-phase microextraction, and analyzed the volatile samples by combined gas chromatography-mass spectrometry. Total volatile emission was greatest during flowering and peak pollinator activity hours, suggesting its importance in mediating ecological interactions. We also detected tissue and reward-specific compounds, consistent with the hypothesis that complexity in floral scent composition reflects several ecological functions. In particular, we found tissue-specific scents for the stigma, stamens, and staminode (a modified sterile stamen common to all Penstemons). Our findings emphasize the dynamic nature of floral scents and highlight a need for greater understanding of ecological and physiological mechanisms driving spatiotemporal patterns in scent production.

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Section: Discussionmentioning

confidence: 98%

Spatiotemporal Floral Scent Variation of Penstemon digitalis

et al. 2015

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“…Chemicals were identified by using the NIST mass spectral program version 2.0 d and the NIST/EPA/NIH mass spectral library (NIST05) when Reverse Matches and Matches were >950 and >900‰, respectively. For each sesquiterpene, the Kovats Retention Index (RI) was compared with the RI calculated from synthetic chemicals when commercially available [RI=1358, 1391, 1442, 1477 for α-cubebene (Bedoukian Research Inc., Danbury CT, USA), α-copaene (Fluka Analytical, Stenheim, Germany), β-caryophyllene (Sigma Chemical Co., St. Louis, MO, USA), and α-humulene (Sigma), respectively] or with previously published data [δ-elemene (Singh et al, 2007), β-elemene (Hosni et al, 2008;Karlsson et al, 2009), alloaromadendrene (Tokushima et al, 2010), cadinene (Singh et al, 2007;Ibrahim et al, 2010), and calamenene (Ibrahim et al, 2010)]. …”

Section: Field Testsmentioning

confidence: 99%

Attraction of the Redbay Ambrosia Beetle, Xyleborus glabratus, to Avocado, Lychee, and Essential Oil Lures

Kendra¹,

Montgomery²,

Niogret³

et al. 2011

J Chem Ecol

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The redbay ambrosia beetle, Xyleborus glabratus Eichhoff, is an exotic wood-boring insect that vectors the mycopathogen responsible for laurel wilt, a lethal vascular disease of trees in the Lauraceae. High mortality has occurred in native Persea species in the southeastern U.S., and the vector-pathogen complex poses an imminent threat to the production of commercial avocado, P. americana, in south Florida. There is a critical need for effective attractants to detect, monitor, and control this invasive pest. This study combined field tests and laboratory bioassays to evaluate the response of female X. glabratus to host-based volatiles from wood of avocado (cultivars of West Indian, Guatemalan, and Mexican races); from wood of lychee (Litchi chinensis, a presumed non-host that is high in the sesquiterpene α-copaene, a putative attractant); and to commercial lures containing manuka and phoebe oils, two reported attractive baits. Volatile collections and GC-MS analyses were performed to quantify the sesquiterpene content of test substrates. In the field, traps baited with lychee wood captured more beetles than those with wood from avocado cultivars; traps baited with phoebe oil lures captured more beetles than those with manuka oil lures (the current monitoring tool). In field and laboratory tests, X. glabratus did not show a preference among avocado races in either attraction or host acceptance (initiation of boring). In choice tests, lychee was more attractive than avocado initially, but a higher percentage of beetles bored into avocado, suggesting that lychee emits more powerful olfactory/visual cues, but that avocado contains more of the secondary cues necessary for host recognition. Emissions of α-copaene, β-caryophyllene, and α-humulene were correlated with field captures, and lychee wood may be a source of additional semiochemicals for X. glabratus.

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“…Values with different letters are significantly different at P \ 0.05, but values with common letters are not significantly different * Identification by comparison with standard compounds a Calculated retention index b retention index from literature 1 RI b from (Ibrahim et al 2010) 2 RI b from (NIST Chemistry web book) 3 RI b from (Ibrahim et al 2010 and NIST) 4 RI b from (Senatore et al 2004) 5 RI b from (Demyttenaere et al 2004) larvae gained less weight. Previously, antifeedant effects of plant extracts have been reported by different researchers (e.g.…”

Section: Feeding and Oviposition Deterrent Effects Of Ye On Dbmmentioning

confidence: 99%

“…Compound identification was made by comparing their mass spectra with those in the Wiley library and authentic external standard compounds. Moreover, their retention indices were compared to those in the NIST (National Institute of Standards and Technology) Chemistry web book (http://webbook.nist.gov/ chemistry/) and/or other published articles on plant volatiles analyzed in the same stationary phase (Demyttenaere et al 2004;Senatore et al 2004;Pino et al 2008;Ibrahim et al 2010). Retention indices (RI) were computed with respect to n-alkane (C 6 -C 17 ) standards using the retention indices for-…”

Section: Voc Collection and Analysismentioning

confidence: 99%

“…To date, there has been no evaluation of yeheb chemistry and its effects on insect behavior or mortality. A study conducted by Ibrahim et al (2010) showed that yeheb emits a diverse mixture of volatile organic compounds, including terpenes, and has high total phenolics (more than 80 mg TAE g -1 leaves dry material). In this study, we addressed two questions.…”

Section: Introductionmentioning

confidence: 99%

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Yeheb (Cordeauxia edulis) extract deters feeding and oviposition of Plutella xylostella and attracts its natural enemy

et al. 2010

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The effects of yeheb (Cordeauxia edulis Hemsl.) leaf extract on feeding and oviposition by diamondback moth (DBM) (Plutella xylostella L.) and the behavior of DBM parasitoid, Cotesia vestalis (Haliday), were studied. Volatile organic compounds (VOCs) from the headspace of intact and DBMdamaged broccoli plants sprayed with yeheb extracts (YE) were also analyzed. Larval feeding and growth, and oviposition by adult DBM were strongly inhibited by the extract. Cotesia vestalis were attracted to volatile blends from intact or DBM-damaged broccoli plants sprayed with YE over intact plants sprayed with water or methanol. Analyses of VOCs in the headspace of broccoli plants revealed that both intact and DBM-damaged plants sprayed with YE showed remarkable differences in sesquiterpene compounds compared to intact control treatments. These combined negative effects of YE on DBM fitness together with positive effects on the parasitoid show that yeheb is a potential source of compounds for use in integrated pest management to control damage caused by DBM.

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Diversity of volatile organic compound emissions from flowering and vegetative branches of Yeheb, Cordeauxia edulis (Caesalpiniaceae), a threatened evergreen desert shrub

Cited by 22 publications

References 50 publications

Spatiotemporal Floral Scent Variation of Penstemon digitalis

Spatiotemporal Floral Scent Variation of Penstemon digitalis

Attraction of the Redbay Ambrosia Beetle, Xyleborus glabratus, to Avocado, Lychee, and Essential Oil Lures

Yeheb (Cordeauxia edulis) extract deters feeding and oviposition of Plutella xylostella and attracts its natural enemy

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