Evidence map›Paper›PMID 25956500›Full record

ArticleProtoplasma2016

Localization of sesquiterpene lactone biosynthesis in cells of capitate glandular trichomes of Helianthus annuus (Asteraceae).

Evelyn Amrehn, Anna-Katharina Aschenbrenner, Annerose Heller, Otmar Spring

Abstract read
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In one paragraph

Article in Protoplasma, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
0.5field-weighted citation impact, top 37% 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

12 citing papers in PubMed, 20 citations in OpenAlex.

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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

4 authors at 1 institution in 1 country.

Evelyn AmrehnInstitute of Botany, University Hohenheim, Garbenstraße 30, 70599, Stuttgart, Germany.
Anna-Katharina AschenbrennerInstitute of Botany, University Hohenheim, Garbenstraße 30, 70599, Stuttgart, Germany.
Annerose HellerInstitute of Botany, University Hohenheim, Garbenstraße 30, 70599, Stuttgart, Germany.
Otmar SpringInstitute of Botany, University Hohenheim, Garbenstraße 30, 70599, Stuttgart, Germany. spring@uni-hohenheim.de.
University of Hohenheim · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Capitate glandular trichomes (CGT) of sunflower, Helianthus annuus, synthesize bioactive sesquiterpene lactones (STLs) within a short period of only a few days during trichome development. In the current project, the subcellular localization of H. annuus germacrene A monooxygenase (HaGAO), a key enzyme of the STL biosynthesis in sunflower CGT, was investigated. A polyclonal antibody raised against this enzyme was used for immunolabelling. HaGAO was found in secretory and stalk cells of CGT. This correlated with the appearance of smooth endoplasmic reticulum in both cell types. Stalk cells and secretory cells differed in form, size and types of plastids, but both had structures necessary for secretion. No HaGAO-specific immunoreaction was found in sunflower leaf tissue outside of CGT or in developing CGT before the secretory phase had started. Our results indicated that not only secretory cells but also nearly all cells of the CGT were involved in the biosynthesis of STL and that this process was not linked to the presence or absence of a specific type of plastid.

Indexed as

Biosynthetic PathwaysCytochrome P-450 Enzyme SystemHelianthusLactonesPlant ProteinsSesquiterpenesTrichomesCytochrome P-450 Enzyme Systemgermacrene A hydroxylaseLactonesPlant ProteinsSesquiterpenesCapitate glandular trichomesFluorescence microscopyImmunolabellingSesquiterpene lactone biosynthesisSunflowerTransmission electron microscopyUltrastructure

Identifiers

PMID25956500
OpenAlexW330437892

What OpenQuestion holds

Textmetadata
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.