The specificity of herbivore-induced plant volatiles in attracting herbivore enemies

McCormick, Andrea Liliana Clavijo; Unsicker, Sybille B.; Gershenzon, Jonathan

doi:10.1016/j.tplants.2012.03.012

Cited by 410 publications

(250 citation statements)

References 111 publications

Supporting

Mentioning

243

Contrasting

Unclassified

Order By: Relevance

“…2) and has been shown to defend against a bacterial pathogen in flowers of Arabidopsis thaliana (Huang et al 2012). Beyond pollinator attraction, floral volatiles are known to deter antagonists (Dobson et al 1996;Kessler and Baldwin 2007), attract parasitoids of herbivores (McCormick et al 2012), mitigate oxidative stress (Calogirou et al 1999;Loreto and Velikova 2001), and defend against microbes (Junker and Tholl 2013;Tholl 2006). Thus, understanding spatiotemporal variation in floral volatiles should provide important clues to dissecting the complex web of functional roles played by particular compounds in floral scent.…”

Section: Discussionmentioning

confidence: 99%

“…Both enantiomers of linalool are known to have diverse ecological functions (Parachnowitsch et al 2013), including attraction of bees to flowers (Dötterl and Vereecken 2010;Kubo and Ono 2014), and function as pheromone components (Borg-Karlson et al 2003). Junker et al (2011) described diverse responses of facultative vs. obligate floral visitors to linalool in a natural community of flowers and their visitors, as have other behaviorally oriented studies demonstrating attraction (Okamoto et al 2015;Steenhuisen et al 2013) or repellence (McCormick et al 2012). As a floral volatile that is also a constituent of nectar in P. digitalis, S-(+)-linalool potentially could influence the presence and abundance of nectar microbes, and their effects on sugar composition (Junker and Tholl 2013).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Spatiotemporal Floral Scent Variation of Penstemon digitalis

et al. 2015

View full text Add to dashboard Cite

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.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Spatiotemporal Floral Scent Variation of Penstemon digitalis

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Isoprene emissions are also sensitive to climate change (Lathiere et al, 2010;Peñuelas and Staudt, 2010;Arneth et al, 2011;Laothawornkitkul et al, 2009). Examples of factors affected by climate change which impact ecosystem isoprene production are species composition (Sharkey and Yeh, 2001); temperature (Monson and Fall, 1989;Sharkey et al, 1999); nitrogen availability (Harley et al, 1994); herbivory/insect interactions (McCormick et al, 2012;Yuan et al, 2009); air quality (Pinto et al, 2010); stress and multiple stressors (Holopainen and Gershenzon, 2010;Niinemets, 2010); and canopy architecture (Harley et al, 1996;Baldocchi et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Isoprene emissions from a tundra ecosystem

et al. 2013

View full text Add to dashboard Cite

Whole-system fluxes of isoprene from a moist acidic tundra ecosystem and leaf-level emission rates of isoprene from a common species (Salix pulchra) in that same ecosystem were measured during three separate field campaigns. The field campaigns were conducted during the summers of 2005, 2010 and 2011 and took place at the Toolik Field Station (68.6° N, 149.6° W) on the north slope of the Brooks Range in Alaska, USA. The maximum rate of whole-system isoprene flux measured was over 1.2 mg C m−2 h−1 with an air temperature of 22 °C and a PAR level over 1500 μmol m−2 s−1. Leaf-level isoprene emission rates for S. pulchra averaged 12.4 nmol m−2 s−1 (27.4 μg C gdw−1 h−1) extrapolated to standard conditions (PAR = 1000 μmol m−2 s−1 and leaf temperature = 30 °C). Leaf-level isoprene emission rates were well characterized by the Guenther algorithm for temperature with published coefficients, but less so for light. Chamber measurements from a nearby moist acidic tundra ecosystem with little S. pulchra emitted significant amounts of isoprene, but at lower rates (0.45 mg C m−2 h−1) suggesting other significant isoprene emitters. Comparison of our results to predictions from a global model found broad agreement, but a detailed analysis revealed some significant discrepancies. An atmospheric chemistry box model predicts that the observed isoprene emissions have a significant impact on Arctic atmospheric chemistry, including a reduction of hydroxyl radical (OH) concentrations. Our results support the prediction that isoprene emissions from Arctic ecosystems will increase with global climate change

show abstract

“…The volatile sesquiterpenoids emitted from insect-damaged rice and maize plants function in indirect defense as chemical cues to attract natural enemies, such as parasitic wasps [26,27,35]. Herbivore enemies have demonstrated the ability to perceive differences in terpene volatile profiles [36,37]. Therefore, the changes in rice sesquiterpene emission profiles caused by functional divergence of OryzaTPS1 may reflect the changing spectra of insect herbivores and their natural enemies present in the environments of different species.…”

Section: Discussionmentioning

confidence: 99%

Positive Darwinian selection is a driving force for the diversification of terpenoid biosynthesis in the genus Oryza

Chen

Köllner

et al. 2014

BMC Plant Biol

Self Cite

View full text Add to dashboard Cite

BackgroundTerpenoids constitute the largest class of secondary metabolites made by plants and display vast chemical diversity among and within species. Terpene synthases (TPSs) are the pivotal enzymes for terpenoid biosynthesis that create the basic carbon skeletons of this class. Functional divergence of paralogous and orthologous TPS genes is a major mechanism for the diversification of terpenoid biosynthesis. However, little is known about the evolutionary forces that have shaped the evolution of plant TPS genes leading to terpenoid diversity.ResultsThe orthologs of Oryza Terpene Synthase 1 (OryzaTPS1), a rice terpene synthase gene involved in indirect defense against insects in Oryza sativa, were cloned from six additional Oryza species. In vitro biochemical analysis showed that the enzymes encoded by these OryzaTPS1 genes functioned either as (E)-β-caryophyllene synthases (ECS), or (E)-β-caryophyllene & germacrene A synthases (EGS), or germacrene D & germacrene A synthases (DAS). Because the orthologs of OryzaTPS1 in maize and sorghum function as ECS, the ECS activity was inferred to be ancestral. Molecular evolutionary detected the signature of positive Darwinian selection in five codon substitutions in the evolution from ECS to DAS. Homology-based structure modeling and the biochemical analysis of laboratory-generated protein variants validated the contribution of the five positively selected sites to functional divergence of OryzaTPS1. The changes in the in vitro product spectra of OryzaTPS1 proteins also correlated closely to the changes in in vivo blends of volatile terpenes released from insect-damaged rice plants.ConclusionsIn this study, we found that positive Darwinian selection is a driving force for the functional divergence of OryzaTPS1. This finding suggests that the diverged sesquiterpene blend produced by the Oryza species containing DAS may be adaptive, likely in the attraction of the natural enemies of insect herbivores.Electronic supplementary materialThe online version of this article (doi:10.1186/s12870-014-0239-x) contains supplementary material, which is available to authorized users.

show abstract

The specificity of herbivore-induced plant volatiles in attracting herbivore enemies

Cited by 410 publications

References 111 publications

Spatiotemporal Floral Scent Variation of Penstemon digitalis

Spatiotemporal Floral Scent Variation of Penstemon digitalis

Isoprene emissions from a tundra ecosystem

Positive Darwinian selection is a driving force for the diversification of terpenoid biosynthesis in the genus Oryza

Contact Info

Product

Resources

About