Role of acyclic compounds in monoterpene biosynthesis in Pinus pinaster

Gleizes, Michel; Marpeau, Anne M.; Pauly, Ginette; Bernard-Dagan, C.

doi:10.1016/0031-9422(82)83091-4

Cited by 17 publications

(11 citation statements)

References 11 publications

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“…Such result reflects the significant negative correlation detected between β-pinene and myrcene, indicating that under drought stress, an interchange between both compounds may take place, along the kinetic pathway of terpenes, in response to tree physiological state. This hypothesis is supported by observations in P. pinaster, where the acyclic monoterpenes myrcene and trans-β-ocimene act as transitory compounds before the biosynthesis of the cyclic monoterpenes α-and β-pinene, all being accumulated in the same resin ducts of the needles (Gleizes et al, 1982).…”

Section: Discussionsupporting

confidence: 66%

Water stress affects Tomicus destruens host pine preference and performance during the shoot feeding phase

Branco¹,

Pereira²,

Mateus³

et al. 2010

Ann. For. Sci.

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Abstract• The effect of water stress on host selection and performance during the shoot feeding phase, by the Mediterranean pine shoot beetle Tomicus destruens, was studied.• Young potted Pinus pinaster plants were subjected to two water supply regimes: (i) well watered; (ii) 4-5 months of moderate drought stress. Plant volatile organic compound (VOCs) emissions were collected by SPME and analysed by GC/MS.• In tests with paired plants, the number of holes and tunnels excavated by beetles in well watered pines was significantly larger than in stressed plants, whereas in no-choice tests no differences occurred.• Beetle survival was significantly higher on well watered, than on stressed pines (p = 0.006), while fat contents also increased (p = 0.09).• Plants could be assigned to treatments based on VOCs emissions, stressed pines emitting more myrcene and less β-pinene than well watered ones.• It is concluded that during the shoot feeding phase, T. destruens preferentially attacks non-stressed plants, in detriment of stressed ones, upon which a higher fitness is attained.• The role of pines VOCs emissions under moderate drought stress, in the host selection and colonization process by the pine shoot beetle, is discussed.

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Section: Discussionsupporting

confidence: 66%

Water stress affects Tomicus destruens host pine preference and performance during the shoot feeding phase

Branco¹,

Pereira²,

Mateus³

et al. 2010

Ann. For. Sci.

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“…However, limonene is emitted in largest quantities in specific chemotypes of Q. coccifera and Q. ilex in Montpellier as well as in Barcelona (Peñuelas & Llusià, 1999; Llusià & Peñuelas, 2000, Table 1). Studies indicate that the stoichiometry of foliar volatile isoprenoids emitted (Tobolski & Hanover, 1971; Hayashi & Komae, 1974; Gleizes et al. , 1982; Merk et al.…”

Section: Discussionmentioning

confidence: 99%

“…, 1998c). Given that acyclic monoterpenes may be the intermediates leading to cyclic monoterpenes (Gleizes et al. , 1982) or may be potentially formed nonenzymatically from the immediate precursor of all foliar monoterpenes – geranylpyrophosphate (GPP, Loreto et al.…”

Section: Discussionmentioning

confidence: 99%

A model coupling foliar monoterpene emissions to leaf photosynthetic characteristics in Mediterranean evergreen Quercus species

et al. 2002

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Summary• A model was developed and parameterized to simulate monoterpene emission rates per unit leaf area (E) dependent on foliar photosynthetic potentials and activity of monoterpene synthases in the evergreen sclerophylls Quercus coccifera L. and Q. ilex L.• Assuming that total activity of monoterpene synthases controls the pathway flux, the product of leaf dry mass per unit area E was culculated as the fraction of total electron flow used for monoterpene synthesis (ε), the rate of photosynthetic electron transport (J) per unit leaf dry mass and the reciprocal of the electron cost of monoterpene synthesis. In the model, light effects on E result from light responses of J, and the temperature relationship of E combines temperature dependencies of J and the specific activity of monoterpene synthase (S S ).• Having determined J from leaf photosynthesis data and deriving an estimate of S S from in vitro laboratory measurements, good fits to diurnal time-courses of monoterpenoid emission rates were obtained using a single leaf-dependent coefficient, the total monoterpene synthase activity in the leaves.• Our analysis demonstrates that using J as a surrogate of E leads to a realistic description of E, especially under stress conditions where the previous models fail. However, analysis of daily time courses of E indicated that storage of monoterpenoids in nonspecific leaf compartments might alter the correspondence between monoterpenoid synthesis and emission rates, especially after rapid environmental change.

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“…We interpret these data to indicate that monoterpene synthesis is generally under enzymatic control, with the exception of ocimenes. Cis and trans‐ β ‐ocimene are acyclic terpenes that can be formed from their intermediates (geranyl pyrophosphate and linalyl or neryl pyrophosphate, respectively) by simple and reversible protonation and deprotonation (Gleizes et al 1982). Other terpenes taken into consideration in this study ( α ‐pinene, β ‐pinene, sabinene) are apparently synthesized by means of cyclases (McGarvey & Croteau 1995).…”

Section: Discussionmentioning

confidence: 99%

“…Other terpenes taken into consideration in this study ( α ‐pinene, β ‐pinene, sabinene) are apparently synthesized by means of cyclases (McGarvey & Croteau 1995). Perhaps cyclases act at a later stage using the acyclic compounds as substrata and irreversibly forming cyclic monoterpenes (Gleizes et al 1982). Our results indicate that only this step is controlled by temperature.…”

Section: Discussionmentioning

confidence: 99%

On the monoterpene emission under heat stress and on the increased thermotolerance of leaves of Quercus ilex L. fumigated with selected monoterpenes

Loreto¹,

et al. 1998

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Leaves of the monoterpene emitter Quercus ilex were exposed to a temperature ramp with 5°C steps from 30 to 55°C while maintained under conditions in which endogenous emission of monoterpenes was allowed or suppressed, or under fumigation with selected exogenous monoterpenes. Fumigation with monoterpenes reduced the decline of photosynthesis, photorespiration and monoterpene emission found in non-fumigated leaves exposed to high temperatures. It also substantially increased respiration when photosynthesis and photorespiration were inhibited by low O 2 and CO 2 -free air. These results indicate that, as previously reported for isoprene, monoterpenes may help plants cope with heat stress. Monoterpenes may enhance membrane stability, thus providing a rather non-specific protection of photosynthetic and respiratory processes. Monoterpene emission was maximal at a temperature of 35°C and was inhibited at higher temperatures. This is likely to be the result of the temperature dependency of the enzymes involved in monoterpene synthesis. In contrast to other monoterpenes, cis-and trans-β-ocimene did not respond to exposure to high temperatures. Cis-β-ocimene also did not respond to low O 2 or to fumigation. These results indicate that cis and trans-β-ocimene may have a different pathway of formation that probably does not involve enzymatic synthesis.

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Role of acyclic compounds in monoterpene biosynthesis in Pinus pinaster

Cited by 17 publications

References 11 publications

Water stress affects Tomicus destruens host pine preference and performance during the shoot feeding phase

Water stress affects Tomicus destruens host pine preference and performance during the shoot feeding phase

A model coupling foliar monoterpene emissions to leaf photosynthetic characteristics in Mediterranean evergreen Quercus species

On the monoterpene emission under heat stress and on the increased thermotolerance of leaves of Quercus ilex L. fumigated with selected monoterpenes

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