Evidence map›Paper›PMID 27935048›Full record

ArticleThe New phytologist2017

Height-related scaling of phloem anatomy and the evolution of sieve element end wall types in woody plants.

Johannes Liesche, Marcelo R Pace, Qiyu Xu, Yongqing Li, Shaolin Chen

Open access · hybridAbstract read
In one paragraph

Article in The New phytologist, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
11.0field-weighted citation impact, top 2% 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

16 citing papers in PubMed, 53 citations in OpenAlex.

  1. Modeling the Hydraulic Conductivity of Phloem Sieve Elements.Methods in molecular biology (Clifton, N.J.) · 2026
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  13. Why is C4 photosynthesis so rare in trees?Journal of experimental botany · 2020
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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

5 authors at 3 institutions in 2 countries.

Johannes LiescheCollege of Life Sciences, Northwest A&F University, Yangling, 712100, China.
Marcelo R PaceDepartment of Botany, National Museum of Natural History, Smithsonian Institution, Washington, DC, 20013-7012, USA.
Qiyu XuCollege of Life Sciences, Northwest A&F University, Yangling, 712100, China.
Yongqing LiSouth China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China.
Shaolin ChenCollege of Life Sciences, Northwest A&F University, Yangling, 712100, China.
Northwest A&F University · CNSmithsonian Institution · USSouth China Botanical Garden · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In the sieve elements (SEs) of the phloem, carbohydrates are transported throughout the whole plant from their site of production to sites of consumption or storage. SE structure, especially of the pore-rich end walls, has a direct effect on translocation efficiency. Differences in pore size and other features were interpreted as an evolutionary trend towards reduced hydraulic resistance. However, this has never been confirmed. Anatomical data of 447 species of woody angiosperms and gymnosperms were used for a phylogenetic analysis of end wall types, calculation of hydraulic resistance and correlation analysis with morphological and physiological variables. end wall types were defined according to pore arrangement: either grouped into a single area (simple) or into multiple areas along the end wall (compound). Convergent evolution of end wall types was demonstrated in woody angiosperms. In addition, an optimization of end wall resistance with plant height was discovered, but found to be independent of end wall type. While physiological factors also showed no correlation with end wall types, the number of sieve areas per end wall was found to scale with SE length. The results exclude the minimization of hydraulic resistance as evolutionary driver of different end wall types, contradicting this long-standing assumption. Instead, end wall type might depend on SE length.

Indexed as

Biological EvolutionClimateLinear ModelsPhloemPhylogenyPlant BarkPlant StemsWaterWoodWatercorrelation analysisevolutionphloemphylogenysieve elementsieve platesieve poretrees

Identifiers

PMID27935048
PMCPMC5347917
OpenAlexW2559989025

What OpenQuestion holds

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LicenceCC BY
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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.