Evidence map›Paper›PMID 34283265›Full record

ArticlePlant cell reports2021

Capsaicinoid biosynthesis in the pericarp of chili pepper fruits is associated with a placental septum-like transcriptome profile and tissue structure.

Yoshiyuki Tanaka, Mayuko Watachi, Wakana Nemoto, Tanjuro Goto, Yuichi Yoshida, Ken-Ichiro Yasuba, Sho Ohno, Motoaki Doi

Abstract read
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In one paragraph

Article in Plant cell reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
–field-weighted citation impact
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

5 citing papers in PubMed.

  1. Pangenomic and Phenotypic Characterization of ColombianInternational journal of molecular sciences · 2025
    Article
  2. Article
  3. Article
  4. Chemical Synthesis ofMolecules (Basel, Switzerland) · 2022
    Article
  5. Transcriptional Regulation of Ripening in Chili Pepper Fruits (International journal of molecular sciences · 2021
    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

8 authors.

Yoshiyuki TanakaGraduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan. tanaka.yoshiyuki.2e@kyoto-u.ac.jp.ORCID http://orcid.org/0000-0002-9298-8671
Mayuko WatachiGraduate School of Environmental and Life Science, Okayama University, Okayama, 700-8530, Japan.
Wakana NemotoGraduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan.
Tanjuro GotoGraduate School of Environmental and Life Science, Okayama University, Okayama, 700-8530, Japan.
Yuichi YoshidaGraduate School of Environmental and Life Science, Okayama University, Okayama, 700-8530, Japan.
Ken-Ichiro YasubaGraduate School of Environmental and Life Science, Okayama University, Okayama, 700-8530, Japan.
Sho OhnoGraduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan.
Motoaki DoiGraduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan.

Funding

Grants-in-Aid for Scientific Research <KAKENHI> 18K05618
6 · The paper itself

Abstract

key messageCAP biosynthesis in the pericarp of chili pepper fruits occurs with an ambiguous boundary in the placental septum and pericarp. Capsaicinoid (CAP) is a pungent ingredient of chili pepper fruits. Generally, CAP biosynthesis is limited to the placental septum of fruits, but it has been reported that its biosynthesis occurs even in the pericarp of some extremely pungent varieties, resulting in a substantial increase in total content. To examine the mechanism of CAP biosynthesis in the pericarp, comparative transcriptome analysis of a variety that produces CAP in the pericarp (MY) and a variety that does not (HB) was carried out. RNA-seq revealed that 2264 genes were differentially expressed in the MY pericarp compared with the HB pericarp. PCA analysis and GO enrichment analysis indicated that the MY pericarp has a gene expression profile more like placental septum than the HB pericarp. The gene expression of CAP biosynthesis-related genes in the MY pericarp changed coordinately with the placental septum during fruit development. In most Capsicum accessions including HB, the distribution of slender epidermal cells producing CAP was limited to the placental septum, and the morphological boundary between the placental septum and pericarp was clear. In some extremely pungent varieties such as MY, slender epidermal cells ranged from the placental septum to the pericarp region, and the pericarp was morphologically similar to the placental septum, such as the absence of large sub-epidermal cells and abundant spaces in the parenchymal tissue. Our data suggest that CAP biosynthesis in the pericarp occurred with an ambiguous boundary in the placental septum and pericarp. These findings contribute to further enhancement of CAP production in chili pepper fruits.

Indexed as

CapsaicinCapsicumFruitGene Expression Regulation, PlantGene OntologyPlant ProteinsPrincipal Component AnalysisCapsaicinPlant ProteinsCapsaicinoidChili pepperFruit anatomyPungencyTranscriptome

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Registered trials

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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.