Abstract
The leaflets of Erythrina herbacea, a leguminous plant native to subtropical North America, undergo daily movements. During the night, leaflets are oriented with their tips pointing downwards and show no rotation around the midrib of each leaflet. In the morning, leaflets rise, passing through a horizontal orientation and, somewhat before noon, reach a maximum average midrib elevation of approximately sixty degrees above the horizontal plane. Simultaneously, each leaflet rotates about the midrib by an average angle of forty to fifty degrees. These leaflet movements result in an initial increase in the relative leaflet surface area presented to the sun during the morning, a decrease in interception of direct solar radiation around noon, followed by a second maximum in light interception in early afternoon.
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Claims 6
Claim · model-written summary
At night Erythrina herbacea leaflets are oriented with tips pointing downwards and show no rotation around their midrib.
- Taxon
- Erythrina herbacea
_(25203076648).jpg?width=60)
Erythrina herbaceae0 - Organ / stage
- leafletse1
- Outcome
- leaflets are oriented with their tips pointing downwardse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_(25203076648).jpg?width=500)
Verbatim
e0“Erythrina herbacea”
e1“During the night, leaflets are oriented with their tips pointing downwards and show no rotation around the midrib of each leaflet”
Claim · model-written summary
In the morning Erythrina herbacea leaflets rise and, somewhat before noon, reach a maximum average midrib elevation of approximately sixty degrees above the horizontal.
- Taxon
- Erythrina herbaceaErythrina herbaceae0
- Outcome
- maximum average midrib elevatione2
- Value
- approximately sixty degreese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Erythrina herbacea”
e2“reach a maximum average midrib elevation of approximately sixty degrees above the horizontal plane”
Claim · model-written summary
Each Erythrina herbacea leaflet rotates about its midrib by an average angle of forty to fifty degrees.
- Taxon
- Erythrina herbaceaErythrina herbaceae0
- Outcome
- rotates about the midrib by an average anglee3
- Value
- forty to fifty degreese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Erythrina herbacea”
e3“each leaflet rotates about the midrib by an average angle of forty to fifty degrees”
Claim · model-written summary
The leaflet movements give an initial increase in the relative leaflet surface area presented to the sun during the morning.
- Taxon
- Erythrina herbaceaErythrina herbaceae0
- Outcome
- relative leaflet surface area presented to the sune4
- Direction
- increasee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Erythrina herbacea”
e4“an initial increase in the relative leaflet surface area presented to the sun during the morning”
Claim · model-written summary
The leaflet movements give a decrease in interception of direct solar radiation around noon.
- Taxon
- Erythrina herbaceaErythrina herbaceae0
- Outcome
- interception of direct solar radiatione5
- Direction
- decreasee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Erythrina herbacea”
e5“a decrease in interception of direct solar radiation around noon”
Claim · model-written summary
The leaflet movements give a second maximum in light interception in early afternoon.
- Taxon
- Erythrina herbaceaErythrina herbaceae0
- Outcome
- second maximum in light interceptione6
- Direction
- maximume6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Erythrina herbacea”
e6“a second maximum in light interception in early afternoon”