Evidence map›Paper›PMID 33477720›Full record

ArticleAntioxidants (Basel, Switzerland)2021

Preharvest Methyl Jasmonate Treatment Increased the Antioxidant Activity and Glucosinolate Contents of Hydroponically Grown Pak Choi.

Min Woo Baek, Han Ryul Choi, Tifsehit Solomon, Cheon Soon Jeong, Ok-Hwan Lee, Shimeles Tilahun

Open access · goldAbstract read
In one paragraph

Article in Antioxidants (Basel, Switzerland), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
2.0field-weighted citation impact, top 13% 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

17 citing papers in PubMed, 33 citations in OpenAlex.

  1. MeJA-Induced Plant Disease Resistance: A Review.Plants (Basel, Switzerland) · 2026
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  4. Distinct Transcriptomic Profile Underlying High COCurrent issues in molecular biology · 2025
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  10. Response ofAntioxidants (Basel, Switzerland) · 2022
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  15. Prestorage High COFrontiers in nutrition · 2022
    Article
  16. Review
  17. 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

6 authors at 3 institutions in 2 countries.

Min Woo BaekDepartment of Horticulture, Kangwon National University, Chuncheon 24341, Korea.ORCID 0000-0002-8051-8082
Han Ryul ChoiDepartment of Horticulture, Kangwon National University, Chuncheon 24341, Korea.
Tifsehit SolomonDepartment of Biology, Wollega University, Nekemte 395, Ethiopia.
Cheon Soon JeongDepartment of Horticulture, Kangwon National University, Chuncheon 24341, Korea.
Ok-Hwan LeeDepartment of Food Science and Biotechnology, Kangwon National University, Chuncheon 24341, Korea.
Shimeles TilahunDepartment of Horticulture, Kangwon National University, Chuncheon 24341, Korea.
Kangwon National University · KRJimma University · ETWollega University · ET

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Vertical hydroponics farming has emerged as an alternative solution to feed the continuously growing world population. Additionally, recent studies reported that the exogenous treatments of jasmonic acid influence the phytochemical composition of Brassicaceae. We conducted this study to determine the effect of preharvest methyl jasmonate (MeJA) treatment on the phytochemical composition and antioxidant activities of soil- and hydroponically grown pak choi. An aqueous solution of 0.5-mM MeJA was sprayed to saturation on the aerial plant part three days before harvest. The harvested pak choi was freeze-dried and then powdered to measure the antioxidant activity and the contents of chlorophylls (Chls), total phenolics and flavonoids, and glucosinolates (GSLs). The overall results revealed that pak choi grown in vertical hydroponics had higher total Chls and total phenolics than those grown in soil in the greenhouse, regardless of MeJA treatment. Nevertheless, the GSLs content and total flavonoids increased significantly due to MeJA treatment in both growing systems, and the highest values were recorded in hydroponically grown MeJA-treated pak choi. Similarly, the 2, 2-di-phenyl-1-picrylhydrazyl (DPPH) radical scavenging capacity, Trolox-equivalent antioxidant capacity (ABTS), oxygen radical absorbance capacity (ORAC), and ferric-reducing antioxidant power (FRAP) were highest in hydroponically grown MeJA-treated pak choi. Taken together, the preharvest foliar treatment of MeJA can be used to improve the phytochemical composition of pak choi grown in both growing systems. Interestingly, the results strongly support the use of MeJA treatment in the vertical hydroponics growing system compared to the conventional growing system in the soil. This indicates that supplementing the vertical hydroponic growing system with preharvest MeJA treatment could be the best option to improve both the yield per square meter and the quality of pak choi. Besides, MeJA-treated pak choi could be used as a value-added horticultural commodity, as its antioxidant activity increased after treatment. Moreover, after further studies, MeJA could also be applied to other Brassica vegetables to improve their GSL contents and antioxidant properties.

Indexed as

ABTSantioxidant activityDPPHflavonoidsFRAPglucosinolatesORACphenolics

Identifiers

PMID33477720
PMCPMC7832332
OpenAlexW3123570794

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.