Effect of Temperature on the Floral Scent Emission and Endogenous Volatile Profile of<i>Petunia axillaris</i>

Sagae, Masanori; Oyama-Okubo, Naomi; Ando, Toshio; Marchesi, Eduardo; Nakayama, Masayoshi

doi:10.1271/bbb.70490

Cited by 91 publications

(70 citation statements)

References 12 publications

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“…57) Sagae et al reported an increase in the emission of volatiles in petunia at temperatures ranging from 20 to 30°C and a significant decline when the temperature was raised to 35°C. 58) In this case, the internal pool of volatiles decreased when the temperature was increased from 20 to 35°C. The activity of insect pollinator is also limited by excessively high temperatures.…”

Section: Seasonal Pathway Triggered By Thermal Changesmentioning

confidence: 83%

Biosynthesis of floral scent 2-phenylethanol in rose flowers

Hirata

Ohnishi

Watanabe

2016

Bioscience, Biotechnology, and Biochemistry

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Plants emit chemically diverse volatile compounds for attracting pollinators or putting up a chemical defense against herbivores. 2-Phenylethanol (2PE) is one of the abundantly emitted scent compounds in rose flowers. Feeding experiments with l-[(2)H8]phenylalanine into rose flowers and subsequent analysis using gas chromatography-mass spectrometry analysis revealed the hypothetical biosynthetic intermediates to [(2)H8]-2PE, and the biochemical and genetic analyses elucidated the principal pathway to [(2)H8]-2PE. We recently found season-specific 2PE pathway producing [(2)H7]-2PE from l-[(2)H8]phenylalanine. This is a unique example where the dominant pathway to a specific compound changes with the seasons. This review focuses on the biosynthesis of floral volatiles and their regulation to adapt to the changes in the environment.

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Section: Seasonal Pathway Triggered By Thermal Changesmentioning

confidence: 83%

Biosynthesis of floral scent 2-phenylethanol in rose flowers

Hirata

Ohnishi

Watanabe

2016

Bioscience, Biotechnology, and Biochemistry

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“…Climate change has been linked to negative crop plant outcomes, including: increased susceptibility to insects and disease [82; 83], decreased competitiveness versus weeds [82; 84], decreased effectiveness of herbicides on weed control [84; 85], reduced overlap between bloom and pollinators [85], reduced pollen viability [22; 23], changes in volatile emissions [86], and quantity and quality of nectar which may affect plant attractiveness [27; 87]. Previous work in New Zealand has identified that higher temperatures may result in increased foraging by honey bees, while reducing species richness [88]—primarily native and introduced flies.…”

Section: Discussionmentioning

confidence: 99%

Possible mechanisms of pollination failure in hybrid carrot seed and implications for industry in a changing climate

et al. 2017

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Approximately one-third of our food globally comes from insect-pollinated crops. The dependence on pollinators has been linked to yield instability, which could potentially become worse in a changing climate. Insect-pollinated crops produced via hybrid breeding (20% of fruit and vegetable production globally) are especially at risk as they are even more reliant on pollinators than open-pollinated plants. We already observe a wide range of fruit and seed yields between different cultivars of the same crop species, and it is unknown how existing variation will be affected in a changing climate. In this study, we examined how three hybrid carrot varieties with differential performance in the field responded to three temperature regimes (cooler than the historical average, average, and warmer that the historical average). We tested how temperature affected the plants' ability to set seed (seed set, pollen viability) as well as attract pollinators (nectar composition, floral volatiles). We found that there were significant intrinsic differences in nectar phenolics, pollen viability, and seed set between the carrot varieties, and that higher temperatures did not exaggerate those differences. However, elevated temperature did negatively affect several characteristics relating to the attraction and reward of pollinators (lower volatile production and higher nectar sugar concentration) across all varieties, which may decrease the attractiveness of this already pollinator-limited crop. Given existing predictions of lower pollinator populations in a warmer climate, reduced attractiveness would add yet another challenge to future food production.

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“…There are several known inhibitors of these pathways. Some flowers readily and markedly change the emission rates of scent compounds depending on the time of day and temperature (Oyama-Okubo et al, 2005;Sagae et al, 2008). The commercially desired inhibition of the biosynthesis of scent compounds needs to be stable under the wide variety of conditions to which flowers may be subjected following delivery to the customer.…”

Section: Introductionmentioning

confidence: 99%

Control of Floral Scent Emission by Inhibitors of Phenylalanine Ammonia-lyase in Cut Flower of Lilium cv. ‘Casa Blanca’

Oyama-Okubo

Nakayama

Ichimura

2011

J. Japan. Soc. Hort. Sci.

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Oriental hybrid lily flowers have a pleasant fragrance. Especially in a confined space, however, the scent can be perceived as too strong and therefore unpleasant. Our analysis of the major scent compounds in cut flowers of 'Casa Blanca' lilies, which is one of the most popular oriental hybrid lilies in Japan, identified two aromatics (benzyl alcohol and iso-eugenol) and two terpenoids (linalool and cis-ocimene). In addition, p-creosol (aromatics) was detected as a minor component. Based on sensual impressions, we assumed that iso-eugenol and p-creosol were the main causes of the unpleasant odor. We concluded that inhibitors of the biosynthesis of aromatics could decrease concentrations of these compounds and make the fragrance of 'Casa Blanca' less unpleasant. The biosynthesis of aromatics is generally catalyzed by phenylalanine ammonia-lyase (PAL). We used aminooxy acetic acid (AOA) and L-2-aminooxy-3-phenylpropionoic acid (AOPP) as PAL inhibitors. Application of AOA and AOPP at 0.1 mM and 1.0 mM by vase treatment decreased the emissions of scent compounds. For practical application, AOA was selected because of its much lower cost. Continuous treatment with AOA decreased the emissions of scent compounds to 10 to 20% of the control at a constant ratio at all times of day on the second and third days after flowering when 'Casa Blanca' emitted the greatest amounts of scent compounds. Similar effects were found on the last day of flowering. Under certain conditions, temporary treatment for 24 h evoked similar effects as continuous treatment. Application of 1.0 mM AOA caused chemical injury to the tepals, but 0.1 mM AOA did not. Treatment of plants with opened flowers was less effective than treatment at a late bud stage. In summary, continuous post-harvest treatment with 0.1 mM AOA of 'Casa Blanca' at late flower bud stages can decrease the emissions of scent compounds and render the fragrance milder without affecting flower morphology through its period of use as an ornamental.

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Effect of Temperature on the Floral Scent Emission and Endogenous Volatile Profile ofPetunia axillaris

Cited by 91 publications

References 12 publications

Biosynthesis of floral scent 2-phenylethanol in rose flowers

Biosynthesis of floral scent 2-phenylethanol in rose flowers

Possible mechanisms of pollination failure in hybrid carrot seed and implications for industry in a changing climate

Control of Floral Scent Emission by Inhibitors of Phenylalanine Ammonia-lyase in Cut Flower of Lilium cv. ‘Casa Blanca’

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