Supply and demand processes as controls over needle monoterpene synthesis and concentration in Douglas fir [Pseudotsuga menziesii (Mirb.) Franco]

Litvak, M. E.; Constable, John V. H.; Monson, Russell K.

doi:10.1007/s00442-002-0964-y

Cited by 47 publications

(37 citation statements)

References 48 publications

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“…0.2-0.8% of needle dry weight. These 10 concentrations are in a similar range to previous observations from other conifers (Lerdau et al, 1997;Litvak and Monson, 1998;Litvak et al, 2002;Kännaste et al, 2013). Since emissions were three orders of magnitude less than pool sizes, they are unlikely to affect the pool sizes in the short to medium term.…”

Section: Discussionsupporting

confidence: 86%

“…or three other Mediterranean woody plants in response to drought and warming (Llusià et al, 2006). Litvak et al (2002) found no relationship between monoterpene storage pool sizes and synthase activities of Douglas fir (Pseudotsuga menziesii). Therefore, a reasonable question is how the phenology, seasonality and environmental stimuli affect 15 the production, storage and emission of monoterpenes, and to what extent they are interrelated.…”

Section: Introductionmentioning

confidence: 85%

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Long-term dynamics of monoterpene synthase activities, monoterpene storage pools and emissions in boreal Scots pine

Vanhatalo¹,

Ghirardo²,

Juurola³

et al. 2018

Preprint

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Abstract. Seasonal variations in monoterpene emissions from Scots pine (Pinus sylvestris) are well documented, and emissions are often shown to follow the incident temperatures due to effects on compound volatility. Recent studies have indicated a link between monoterpene emissions and physiological drivers such as photosynthetic capacity during needle 15 development. The complex interplay between the dynamic changes in the biosynthetic capacity to produce monoterpenes and the temperature-dependent evaporation process of volatiles from internal storage reservoirs has not yet been studied under field conditions. Here, we analysed the relationships between needle monoterpene synthase activities, endogenous monoterpene storage pools and monoterpene emissions of needles in two consecutive years at a boreal forest site in Finland. 20The results showed changes in the monoterpene synthase activity of needles, linked to seasonality and needle ontogenesis, while the pool of stored monoterpenes (about 0.5% of dry weight) did not change considerably as a function of needle aging.Monoterpene emissions did not correlate directly with enzyme activity or the storage pool size. We observed notably high plant-to-plant variation in the biosynthesis rates of individual monoterpenes, which did not reflect the storage compound mixture. The enzyme activity producing δ-3-carene was only present in the first months after needle flushing, and decreased 25 with needle age, whereas δ-3-carene was abundant in the endogenous monoterpene pool and dominated the needle emissions.This study emphasizes the seasonal, developmental and intraspecific variability of monoterpene biosynthesis and storage, and calls for more in-depth analyses to reveal how such complex interaction affects monoterpene emissions from pine needles in boreal forests. 30Biogeosciences Discuss., https://doi

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Section: Discussionsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 85%

Long-term dynamics of monoterpene synthase activities, monoterpene storage pools and emissions in boreal Scots pine

Vanhatalo¹,

Ghirardo²,

Juurola³

et al. 2018

Preprint

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“…Due to the high K m value of isoprene synthase, poor substrate availability due to partitioning to competing pathways may prevent isoprene synthase to be active. Even though it is questionable whether isoprenoid synthesis is ever limited by photosynthesis, as isoprenoid synthesis requires only a few percent of total photosynthetic turnover of reduced carbon, ATP and NADPH (Niinemets et al 2002b), this physiological regulation of isoprene biosynthesis would be consistent with the Carbon-Nutrient Balance Hypothesis (CNB) and/or the Growth-Differentiation Balance Hypothesis (GDB) (Litvak, Constable & Monson 2002). CNB and GDB assume that the synthesis of carbon-rich secondary compounds is limited by the availability of photosynthates (i.e.…”

Section: Link Between Isoprene Emission Capacity and Gross Photosynthmentioning

confidence: 86%

Strong correlation between isoprene emission and gross photosynthetic capacity during leaf phenology of the tropical tree species Hymenaea courbaril with fundamental changes in volatile organic compounds emission composition during early leaf development

Kühn

Rottenberger

Biesenthal

et al. 2004

Plant Cell & Environment

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Changes of the volatile organic compounds (VOC) emission capacity and composition of different developmental stages of the tropical tree species Hymenaea courbaril were investigated under field conditions at a remote Amazonian rainforest site. The basal emission capacity of isoprene changed considerably over the course of leaf development, from young to mature and to senescent leaves, ultimately spanning a wide range of observed isoprene basal emission capacities from 0.7 to 111.5 m m m m g C g ---during the course of the year. By adjusting the standard emission factors for individual days, the diel courses of instantaneous isoprene emission rates could nevertheless adequately be modelled by a current isoprene algorithm. The results demonstrate the inadequacy of using one single standard emission factor to represent the VOC emission capacity of tropical vegetation for an entire seasonal cycle. A strong linear correlation between the isoprene emission capacity and the gross photosynthetic capacity (GP max ) covering all developmental stages and seasons was observed. The present results provide evidence that leaf photosynthetic properties may confer a valuable basis to model the seasonal variation of isoprenoid emission capacity; especially in tropical regions where the environmental conditions vary less than in temperate regions. In addition to induction and variability of isoprene emission during early leaf development, considerable amounts of monoterpenes were emitted in a light-dependent manner exclusively in the period between bud break and leaf maturity. The fundamental change in emission composition during this stage as a consequence of resource availability ( supply side control ) or as a plant's response to the higher defence demand of young emerging leaves ( demand-side control ) is discussed. The finding of a temporary emergence of monoterpene emission may be of general interest in understanding both the ecological functions of isoprenoid production and the regulatory processes involved.

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“…Theoretical considerations based on tissue carbon/nitrogen (C/N) ratios predict stronger accumulation of secondary compounds such as monoterpenes when carbon availability is in excess of that required for growth, e.g., under elevated CO 2 concentrations (Lerdau et al, 1994;Litvak et al, 2002;Peñuelas and Estiarte, 1998). This in turn suggests potentially higher emissions under elevated CO 2 (Lerdau et al, 1994;Litvak et al, 2002;Peñuelas and Estiarte, 1998).…”

Section: Growth Co 2 Effects In Terpene-storing Speciesmentioning

confidence: 99%

The emission factor of volatile isoprenoids: stress, acclimation, and developmental responses

et al. 2010

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Abstract. The rate of constitutive isoprenoid emissions from plants is driven by plant emission capacity under specified environmental conditions (E S , the emission factor) and by responsiveness of the emissions to instantaneous variations in environment. In models of isoprenoid emission, E S has been often considered as intrinsic species-specific constant invariable in time and space. Here we analyze the variations in species-specific values of E S under field conditions focusing on abiotic stresses, past environmental conditions and developmental processes. The reviewed studies highlight strong stress-driven, adaptive (previous temperature and light environment and growth CO 2 concentration) and developmental (leaf age) variations in E S values operating at medium to long time scales. These biological factors can alter species-specific E S values by more than an order of magnitude. While the majority of models based on early concepts still ignore these important sources of variation, recent models are including some of the medium-to long-term controls. However, conceptually different strategies are being used for incorporation of these longer-term controls with important practical implications for parameterization and application of these models. This analysis emphasizes the need to include more biological realism in the isoprenoid emission models and also highlights the gaps in knowledge that require further experimental work to reduce the model uncertainties associated with biological sources of variation.

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Supply and demand processes as controls over needle monoterpene synthesis and concentration in Douglas fir [Pseudotsuga menziesii (Mirb.) Franco]

Cited by 47 publications

References 48 publications

Long-term dynamics of monoterpene synthase activities, monoterpene storage pools and emissions in boreal Scots pine

Long-term dynamics of monoterpene synthase activities, monoterpene storage pools and emissions in boreal Scots pine

Strong correlation between isoprene emission and gross photosynthetic capacity during leaf phenology of the tropical tree species Hymenaea courbaril with fundamental changes in volatile organic compounds emission composition during early leaf development

The emission factor of volatile isoprenoids: stress, acclimation, and developmental responses

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