Abstract
Abstract. Plants are an important source of atmospheric methanol (MeOH), the second most abundant organic gas after methane. Factors regulating phytogenic MeOH production are not well constrained in current MeOH emission models. Previous studies have indicated that light may have a direct influence on MeOH production. As light is known to regulate cell wall expansion, it was predicted that light would stimulate MeOH production through the pectin methylesterase (PME) pathway. MeOH emissions normalized for stomatal conductance (gs) did not, however, increase with light over short time scales (20–30 min). After experimentally controlling for gs and temperature, no light activation of PME activity or MeOH emission was observed. The results clearly demonstrate that light does not directly influence short-term changes in MeOH production and emission. Our data suggest that substrate limitation may be important in regulating MeOH production over short time scales. Future investigation of the long-term impacts of light on MeOH production may increase understanding of MeOH emission dynamics at the seasonal time scale.
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Claims 4
Claim · model-written summary
Methanol emissions normalized for stomatal conductance did not increase with light over 20–30 minutes.
- Taxon
- Lycopersicon esculentum
Solanum lycopersicumt0 - Treatment
- lighte0
- Outcome
- MeOH emissions normalized for stomatal conductance (gs)e0
- Direction
- did not, however, increasee0
- Qualifier
- short time scales (20–30 min)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lycopersicon esculentum”
e0“MeOH emissions normalized for stomatal conductance (gs) did not, however, increase with light over short time scales (20–30 min).”
Claim · model-written summary
With stomatal conductance and temperature controlled, light did not activate pectin methylesterase activity.
- Taxon
- Lycopersicon esculentumSolanum lycopersicumt0
- Treatment
- lighte0
- Outcome
- PME activitye0
- Direction
- no light activatione0
- Qualifier
- controlling for gs and temperaturee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lycopersicon esculentum”
e0“After experimentally controlling for gs and temperature, no light activation of PME activity or MeOH emission was observed.”
Claim · model-written summary
With stomatal conductance and temperature controlled, light did not activate methanol emission.
- Taxon
- Lycopersicon esculentumSolanum lycopersicumt0
- Treatment
- lighte0
- Outcome
- MeOH emissione0
- Direction
- no light activatione0
- Qualifier
- controlling for gs and temperaturee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lycopersicon esculentum”
e0“After experimentally controlling for gs and temperature, no light activation of PME activity or MeOH emission was observed.”
Claim · model-written summary
The authors suggest substrate limitation may regulate methanol production over short time scales.
- Taxon
- Lycopersicon esculentumSolanum lycopersicumt0
- Outcome
- MeOH productione0
- Qualifier
- substrate limitatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lycopersicon esculentum”
e0“Our data suggest that substrate limitation may be important in regulating MeOH production over short time scales.”
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