Evidence map›Paper›PMID 34636420›Full record

ArticleAmerican journal of botany2021

Quantifying the effect of shade on cuticle morphology and carbon isotopes of sycamores: present and past.

Joseph N Milligan, Andrew G Flynn, Jennifer D Wagner, Lenny L R Kouwenberg, Richard S Barclay, Bruce W Byars, Regan E Dunn, Joseph D White, Bernd Zechmann, Daniel J Peppe

Open access · hybridAbstract read
In one paragraph

Article in American journal of botany, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
3.3field-weighted citation impact, top 8% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed, 14 citations in OpenAlex.

  1. Article
  2. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors at 5 institutions in 1 country.

Joseph N MilliganTerrestrial Paleoclimatology Research Group, Department of Geosciences, Baylor University, Waco, TX, USA.ORCID 0000-0002-9785-5616
Andrew G FlynnTerrestrial Paleoclimatology Research Group, Department of Geosciences, Baylor University, Waco, TX, USA.ORCID 0000-0002-1371-1878
Jennifer D WagnerDepartment of Integrative Biology, University of California Berkeley, and UC Museum of Paleontology, Berkeley, CA, USA.ORCID 0000-0002-4165-1702
Lenny L R KouwenbergDepartment of Geology, Field Museum of Natural History, Chicago, IL, USA.
Richard S BarclayDepartment of Paleobiology, National Museum of Natural History, Smithsonian Institution, 10th & Constitution Avenue NW, Washington, D.C., USA.ORCID 0000-0003-4979-6970
Bruce W ByarsCenter for Spatial Research, Baylor University, Waco, TX, USA.
Regan E DunnNatural History Museums of Los Angeles County, La Brea Tar Pits, Los Angeles, CA, USA.ORCID 0000-0002-6042-0619
Joseph D WhiteDepartment of Biology, Baylor University, Waco, TX, USA.ORCID 0000-0002-9249-5009
Bernd ZechmannCenter for Microscopy and Imaging, Baylor University, Waco, TX, USA.ORCID 0000-0002-7702-2588
Daniel J PeppeTerrestrial Paleoclimatology Research Group, Department of Geosciences, Baylor University, Waco, TX, USA.ORCID 0000-0003-4263-133X
Baylor University · USField Museum of Natural History · USMuseum of Vertebrate Zoology · USNatural History Museum of Los Angeles County · USSmithsonian Institution · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

premiseReconstructing the light environment and architecture of the plant canopy from the fossil record requires the use of proxies, such as those derived from cell wall undulation, cell size, and carbon isotopes. All approaches assume that plant taxa will respond predictably to changes in light environments. However, most species-level studies looking at cell wall undulation only consider "sun" or "shade" leaves; therefore, we need a fully quantitative taxon-specific method.

methodsWe quantified the response of cell wall undulation, cell size, and carbon isotopes of Platanus occidentalis using two experimental setups: (1) two growth chambers at low and high light and (2) a series of outdoor growth experiments using green and black shade cloth at different densities. We then developed and applied a proxy for daily light integral (DLI) to fossil Platanites leaves from two early Paleocene floras from the San Juan Basin in New Mexico.

resultsAll traits responded to light environment. Cell wall undulation was the most useful trait for reconstructing DLI in the geological record. Median reconstructed DLI from early Paleocene leaves was ~44 mol m

conclusionsCell wall undulation of P. occidentalis is a robust, quantifiable measurement of light environment that can be used to reconstruct the paleo-light environment from fossil leaves. The distribution of high DLI values from fossil leaves may provide information on canopy architecture; indicating that either (1) most of the canopy mass is within the upper portion of the crown or (2) leaves exposed to more sunlight are preferentially preserved.

Indexed as

PhotosynthesisTreesCarbon IsotopesPlant LeavesSunlightCarbon Isotopesdaily light integralfossilleaf carbon isotopeleaf cell areapaleobotanyPlatanaceaePlatanusundulation index

Identifiers

PMID34636420
PMCPMC9306692
OpenAlexW3207425447

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.