Evidence map›Paper›PMID 33995427›Full record

SynthesisFrontiers in plant science2021

Supplemental LED Lighting Effectively Enhances the Yield and Quality of Greenhouse Truss Tomato Production: Results of a Meta-Analysis.

Elisa Appolloni, Francesco Orsini, Giuseppina Pennisi, Xavier Gabarrell Durany, Ivan Paucek, Giorgio Gianquinto

Open access · goldAbstract readSystematic Review
In one paragraph

Synthesis in Frontiers in plant science, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
4.9field-weighted citation impact, top 6% 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

11 citing papers in PubMed, 47 citations in OpenAlex.

  1. Article
  2. Mechanisms ofFrontiers in plant science · 2026
    Article
  3. Article
  4. Article
  5. Environmental conditions and nutritional quality of vegetables in protected cultivation.Comprehensive reviews in food science and food safety · 2025
    Review
  6. Review
  7. Review
  8. Article
  9. Article
  10. Article
  11. Review
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

6 authors at 2 institutions in 2 countries.

Elisa AppolloniDISTAL - Department of Agricultural and Food Sciences, Alma Mater Studiorum - Università di Bologna, Bologna, Italy.
Francesco OrsiniDISTAL - Department of Agricultural and Food Sciences, Alma Mater Studiorum - Università di Bologna, Bologna, Italy.
Giuseppina PennisiDISTAL - Department of Agricultural and Food Sciences, Alma Mater Studiorum - Università di Bologna, Bologna, Italy.
Xavier Gabarrell DuranyMaría de Maeztu Unit of Excellence, Institut de Ciència i Tecnologia Ambientals (ICTA-UAB), Universitat Autònoma de Barcelona, Barcelona, Spain.
Ivan PaucekDISTAL - Department of Agricultural and Food Sciences, Alma Mater Studiorum - Università di Bologna, Bologna, Italy.
Giorgio GianquintoDISTAL - Department of Agricultural and Food Sciences, Alma Mater Studiorum - Università di Bologna, Bologna, Italy.
University of Bologna · ITUniversitat Autònoma de Barcelona · ES

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Intensive growing systems used for greenhouse tomato production, together with light interception by cladding materials or other devices, may induce intracanopy mutual shading and create suboptimal environmental conditions for plant growth. There are a large number of published peer-reviewed studies assessing the effects of supplemental light-emitting diode (LED) lighting on improving light distribution in plant canopies, increasing crop yields and producing qualitative traits. However, the research results are often contradictory, as the lighting parameters (e.g., photoperiod, intensity, and quality) and environmental conditions vary among conducted experiments. This research presents a global overview of supplemental LED lighting applications for greenhouse tomato production deepened by a meta-analysis aimed at answering the following research question: does supplemental LED lighting enhance the yield and qualitative traits of greenhouse truss tomato production? The meta-analysis was based on the differences among independent groups by comparing a control value (featuring either background solar light or solar + HPS light) with a treatment value (solar + supplemental LED light or solar + HPS + supplemental LED light, respectively) and included 31 published papers and 100 total observations. The meta-analysis results revealed the statistically significant positive effects (

Indexed as

greenhouseinterlightingLEDSolanum lycopersicumsupplemental light

Identifiers

PMID33995427
PMCPMC8118716
OpenAlexW3157942677

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.