Leaf isoprene emission as a trait that mediates the growth-defense tradeoff in the face of climate stress

Monson, Russell K.; Weraduwage, Sarathi M.; Rosenkranz, Maaria; Schnitzler, Jörg‐Peter; Sharkey, Thomas D.

doi:10.1007/s00442-020-04813-7

Cited by 56 publications

(52 citation statements)

References 139 publications

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“…Alpha-pinene has been shown to enhance photosynthetic thermal tolerance in a manner similar to isoprene (Copolovici et al, 2005). Similar to recent conclusions about isoprene (Zuo et al, 2019;Monson et al, 2021), emerging evidence suggests that monoterpenes act as signaling mechanisms to coordinate cellular responses to abiotic and biotic stresses (Riedlmeier et al, 2017;Frank et al, 2021). Due to their similar metabolic dependencies, forest emissions of lightdependent VI can be modeled with a single function based on photosynthetic electron transport rates, while applying a simple fractionation to apportion into the prominent gas species (Hantson et al, 2017).…”

Section: Combined Detection Of Isoprene and Monoterpenesmentioning

confidence: 65%

“…Forest emissions will depend on the influence of forest structure on dynamic sub-canopy light environments (Niinemets et al, 2010a;Way and Pearcy, 2012;Smith et al, 2019), and cannot be represented as simple steady-state responses to canopy surface conditions. It is worth further exploring how such subtleties in the ecological context of emissions relate to other emerging, nuanced views of the role of VI in dynamic regulation of gene expression (Lantz et al, 2019b;Zuo et al, 2019) and growth-defense tradeoffs in species' ecological strategies (Monson et al, 2021).…”

Section: Unexpected Vertical Profile Of Emission Capacities In a Tropical Forestmentioning

confidence: 99%

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A New Field Instrument for Leaf Volatiles Reveals an Unexpected Vertical Profile of Isoprenoid Emission Capacities in a Tropical Forest

Taylor¹,

Wisniewski²,

Alves³

et al. 2021

Front. For. Glob. Change

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Both plant physiology and atmospheric chemistry are substantially altered by the emission of volatile isoprenoids (VI), such as isoprene and monoterpenes, from plant leaves. Yet, since gaining scientific attention in the 1950’s, empirical research on leaf VI has been largely confined to laboratory experiments and atmospheric observations. Here, we introduce a new field instrument designed to bridge the scales from leaf to atmosphere, by enabling precision VI detection in real time from plants in their natural ecological setting. With a field campaign in the Brazilian Amazon, we reveal an unexpected distribution of leaf emission capacities (EC) across the vertical axis of the forest canopy, with EC peaking in the mid-canopy instead of the sun-exposed canopy surface, and moderately high emissions occurring in understory specialist species. Compared to the simple interpretation that VI protect leaves from heat stress at the hot canopy surface, our results encourage a more nuanced view of the adaptive role of VI in plants. We infer that forest emissions to the atmosphere depend on the dynamic microenvironments imposed by canopy structure, and not simply on canopy surface conditions. We provide a new emissions inventory from 52 tropical tree species, revealing moderate consistency in EC within taxonomic groups. We highlight priorities in leaf volatiles research that require field-portable detection systems. Our self-contained, portable instrument provides real-time detection and live measurement feedback with precision and detection limits better than 0.5 nmolVI m–2leaf s–1. We call the instrument ‘PORCO’ based on the gas detection method: photoionization of organic compounds. We provide a thorough validation of PORCO and demonstrate its capacity to detect ecologically driven variation in leaf emission rates and thus accelerate a nascent field of science: the ecology and ecophysiology of plant volatiles.

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Section: Combined Detection Of Isoprene and Monoterpenesmentioning

confidence: 65%

Section: Unexpected Vertical Profile Of Emission Capacities In a Tropical Forestmentioning

confidence: 99%

A New Field Instrument for Leaf Volatiles Reveals an Unexpected Vertical Profile of Isoprenoid Emission Capacities in a Tropical Forest

Taylor¹,

Wisniewski²,

Alves³

et al. 2021

Front. For. Glob. Change

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show abstract

“…Ecological observations report a role for monoterpenes in plant communication with other organisms ( Bouwmeester et al, 2019 ), which is arguably not observed for isoprene (e.g. Brilli et al, 2009 ), However, isoprene influences many plant traits ( Monson et al, 2021 ) and profoundly modifies properties of cellular and sub-cellular membranes ( Velikova et al, 2015 ; Pollastri et al, 2019 ), which may in turn activate signals reshaping plant genomes and phenomes ( Harvey and Sharkey, 2016 ; Miloradovic van Doorn et al, 2020 ). As isoprene is the main VOC emitted constitutively and not induced by stresses, it may be tempting to generalize from our observations that, unlike induced VOCs, constitutive VOCs are not bound by OBPs.…”

Section: Resultsmentioning

confidence: 99%

A hypothesis on the capacity of plant odorant-binding proteins to bind volatile isoprenoids based on in silico evidences

Giordano

Facchiano

D’Auria

et al. 2021

eLife

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Volatile organic compounds (VOCs) from ‘emitting’ plants inform the ‘receiving’ (listening) plants of impending stresses or simply of their presence. However, the receptors that allow receivers to detect the volatile cue are elusive. Most likely, plants (as animals) have odorant-binding proteins (OBPs), and in fact, a few OBPs are known to bind ‘stress-induced’ plant VOCs. We investigated whether these and other putative OBPs may bind volatile constitutive and stress-induced isoprenoids, the most emitted plant VOCs, with well-established roles in plant communication and defense. Molecular docking simulation experiments suggest that structural features of a few plant proteins screened in databases could allow VOC binding. In particular, our results show that monoterpenes may bind the same plant proteins that were described to bind other stress-induced VOCs, while the constitutive hemiterpene isoprene is unlikely to bind any investigated putative OBP and may not have an info-chemical role. We conclude that, as for animal, there may be plant OBPs that bind multiple VOCs. Plant OBPs may play an important role in allowing plants to eavesdrop messages by neighboring plants, triggering defensive responses and communication with other organisms.

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“…Forest emissions will depend on the influence of forest structure on dynamic sub-canopy light environments (Ülo Niinemets et al, 2010;Smith et al, 2019;Way & Pearcy, 2012), and cannot be represented as simple steady-state responses to canopy surface conditions. It is worth further exploring how such subtleties in the ecological context of emissions relate to other emerging, nuanced views of the role of VI in dynamic regulation of gene expression (Lantz, Allman, et al, 2019;Zuo et al, 2019) and growth-defense tradeoffs in species' ecological strategies (Russell K. Monson et al, 2021).…”

Section: Unexpected Vertical Profile Of Emission Capacities In a Tropmentioning

confidence: 99%

A new field instrument for leaf volatiles reveals an unexpected vertical profile of isoprenoid emission capacities in a tropical forest

Taylor

Wisniewski

Alves

et al. 2021

Preprint

View full text Add to dashboard Cite

Both plant physiology and atmospheric chemistry are substantially altered by the emission of volatile isoprenoids (VI), such as isoprene and monoterpenes, from plant leaves. Yet, since gaining scientific attention in the 1950's, empirical research on leaf VI has been largely confined to laboratory experiments and atmospheric observations. Here, we introduce a new field instrument designed to bridge the scales from leaf to atmosphere, by enabling precision VI detection in real time from plants in their natural ecological setting. With a field campaign in the Brazilian Amazon, we reveal an unexpected distribution of leaf emission capacities (EC) across the vertical axis of the forest canopy, with EC peaking in the mid-canopy instead of the sun-exposed canopy surface, and high emissions occurring in understory specialist species. Compared to the simple interpretation that VI protect leaves from heat stress at the hot canopy surface, our results encourage a more nuanced view of the adaptive role of VI in plants. We infer that forest emissions to the atmosphere depend on the dynamic microenvironments imposed by canopy structure, and not simply on canopy surface conditions. We provide a new emissions inventory from 51 tropical tree species, revealing moderate consistency in EC within taxonomic groups. Our self-contained, portable instrument provides real-time detection and live measurement feedback with precision and detection limits better than 0.5 nmol m-2leaf s-1. We call the instrument 'PORCO' based on the gas detection method: photoionization of organic compounds. We provide a thorough validation of PORCO and demonstrate its capacity to detect ecologically driven variation in leaf emission rates and thus accelerate a nascent field of science: the ecology and ecophysiology of plant volatiles.

show abstract

Leaf isoprene emission as a trait that mediates the growth-defense tradeoff in the face of climate stress

Cited by 56 publications

References 139 publications

A New Field Instrument for Leaf Volatiles Reveals an Unexpected Vertical Profile of Isoprenoid Emission Capacities in a Tropical Forest

A New Field Instrument for Leaf Volatiles Reveals an Unexpected Vertical Profile of Isoprenoid Emission Capacities in a Tropical Forest

A hypothesis on the capacity of plant odorant-binding proteins to bind volatile isoprenoids based on in silico evidences

A new field instrument for leaf volatiles reveals an unexpected vertical profile of isoprenoid emission capacities in a tropical forest

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