Abstract
Abstract Methane (CH 4 ) formation by vegetation has been studied intensively over the last 15 years. However, reported CH 4 emissions vary by several orders of magnitude, thus making global estimates difficult. Moreover, the mechanism(s) for CH 4 formation by plants is (are) largely unknown. Here, we introduce a new approach for making CH 4 formation by plants clearly visible. By application of 13 C‐labeled dimethyl sulfoxide (DMSO) onto the leaves of tobacco plants ( Nicotiana tabacum ) and Chinese silver grass ( Miscanthus sinensis ) the effect of light and dark conditions on CH 4 formation of this pathway was examined by monitoring stable carbon isotope ratios of headspace CH 4 (δ 13 C‐CH 4 values). Both plant species showed increasing headspace δ 13 C‐CH 4 values while exposed to light. Higher light intensities increased CH 4 formation rates in N. tabacum but decreased rates for M. sinensis . In the dark no formation of CH 4 could be detected for N. tabacum , while M. sinensis still produced ~50% of CH 4 compared to that during light exposure. Our findings suggest that CH 4 formation is clearly dependent on light conditions and plant species and thus indicate that DMSO is a potential precursor of vegetative CH 4 . The novel isotope approach has great potential to investigate, at high temporal resolution, physiological, and environmental factors that control pathway‐specific CH 4 emissions from plants.
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Claims 6
Claim · model-written summary
Both plant species showed increasing headspace δ 13 C‐CH 4 values while exposed to light.
- Taxon
- Nicotiana tabacum
Nicotiana tabacume1 - Treatment
- lighte0
- Outcome
- headspace δ 13 C‐CH 4 valuese0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both plant species showed increasing headspace δ 13 C‐CH 4 values while exposed to light.”
e1“tobacco plants ( Nicotiana tabacum )”
Claim · model-written summary
Higher light intensities increased CH 4 formation rates in N. tabacum
- Taxon
- N. tabacumNicotiana tabacume0
- Treatment
- Higher light intensitiese0
- Outcome
- CH 4 formation ratese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher light intensities increased CH 4 formation rates in N. tabacum”
Claim · model-written summary
Higher light intensities increased CH 4 formation rates in N. tabacum but decreased rates for M. sinensis
- Taxon
- M. sinensis
Miscanthus sinensise0 - Treatment
- Higher light intensitiese0
- Outcome
- ratese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher light intensities increased CH 4 formation rates in N. tabacum but decreased rates for M. sinensis”
Claim · model-written summary
In the dark no formation of CH 4 could be detected for N. tabacum
- Taxon
- N. tabacumNicotiana tabacume0
- Treatment
- darke0
- Outcome
- formation of CH 4e0
- Direction
- no formatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the dark no formation of CH 4 could be detected for N. tabacum”
Claim · model-written summary
In the dark no formation of CH 4 could be detected for N. tabacum , while M. sinensis still produced ~50% of CH 4 compared to that during light exposure
- Taxon
- M. sinensisMiscanthus sinensise0
- Treatment
- darke0
- Outcome
- CH 4e0
- Direction
- ~50%e0
- Value
- ~50%e0
- Comparator
- light exposuree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the dark no formation of CH 4 could be detected for N. tabacum , while M. sinensis still produced ~50% of CH 4 compared to that during light exposure”
Claim · model-written summary
DMSO is a potential precursor of vegetative CH 4
- Taxon
- tobacco plantsNicotiana tabacume1
- Compound
- DMSOe0
- Outcome
- vegetative CH 4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DMSO is a potential precursor of vegetative CH 4”
e1“tobacco plants ( Nicotiana tabacum )”
The same questions in other papers
light · molecular: metabolites · Nicotiana tabacum (tobacco)Positive and negative results
7 papers in the same direction as this paper · 13 in the opposite direction
- negative
- negative
- no effect
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See all 21 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.