Evidence map›Paper›PMID 28588235›Full record

ArticleScientific reports2017

Parasitic nematode Meloidogyne incognita interactions with different Capsicum annum cultivars reveal the chemical constituents modulating root herbivory.

Ruth Kihika, Lucy K Murungi, Danny Coyne, Margaret Ng'ang'a, Ahmed Hassanali, Peter E A Teal, Baldwyn Torto

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed, 1 pooled it
21.3field-weighted citation impact, top 1% 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

25 citing papers in PubMed, 1 synthesis or guideline pooled it, 113 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Underground Signals: The Ecological Power of Root Volatiles.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026
    Review
  4. Article
  5. Article
  6. AWA and ASH Homologous Sensing Genes ofPathogens (Basel, Switzerland) · 2022
    Article
  7. Article
  8. Review
  9. The EndophyteFrontiers in plant science · 2022
    Article
  10. Article
  11. Review
  12. Article
  13. Article
  14. Review
  15. Article
  16. Article
  17. Journal of nematology · 2020
    Article
  18. Review
  19. Article
  20. 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

7 authors at 5 institutions in 2 countries.

Ruth KihikaBehavioural and Chemical Ecology Unit, International Centre of Insect Physiology and Ecology, P.O. Box 30772-00100, Nairobi, Kenya.
Lucy K MurungiJomo Kenyatta University of Agriculture and Technology, P.O. Box 62000-00200, Nairobi, Kenya.
Danny CoyneInternational Institute of Tropical Agriculture (IITA), P.O. Box 30772-00100, Nairobi, Kenya.
Margaret Ng'ang'aKenyatta University, P.O. Box 43844- 00100, Nairobi, Kenya.
Ahmed HassanaliKenyatta University, P.O. Box 43844- 00100, Nairobi, Kenya.
Peter E A TealUSDA/ARS-CMAVE, 1600/1700 SW23rd Dr., Gainesville, FL, 32608, USA.
Baldwyn TortoBehavioural and Chemical Ecology Unit, International Centre of Insect Physiology and Ecology, P.O. Box 30772-00100, Nairobi, Kenya. btorto@icipe.org.
International Centre of Insect Physiology and Ecology · KEKenyatta University · KEAgricultural Research Service · USInternational Institute of Tropical Agriculture · KEJomo Kenyatta University of Agriculture and Technology · KE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Plant volatile signatures are often used as cues by herbivores to locate their preferred hosts. Here, we report on the volatile organic compounds used by the subterranean root-knot nematode (RKN) Meloidogyne incognita for host location. We compared responses of infective second stage juveniles (J2s) to root volatiles of three cultivars and one accession of the solanaceous plant, Capsicum annum against moist sand in dual choice assays. J2s were more attracted to the three cultivars than to the accession, relative to controls. GC/MS analysis of the volatiles identified common constituents in each plant, five of which were identified as α-pinene, limonene, 2-methoxy-3-(1-methylpropyl)-pyrazine, methyl salicylate and tridecane. We additionally identified thymol as being specific to the accession. In dose-response assays, a blend of the five components elicited positive chemotaxis (71-88%), whereas individual components elicited varying responses; Methyl salicylate (MeSA) elicited the highest positive chemotaxis (70-80%), α-pinene, limonene and tridecane were intermediate (54-60%), and 2-methoxy-3-(1-methylpropyl)-pyrazine the lowest (49-55%). In contrast, thymol alone or thymol combined with either the preferred natural plant root volatiles or the five-component synthetic blend induced negative chemotaxis. Our results provide insights into RKN-host plant interactions, creating new opportunities for plant breeding programmes towards management of RKNs.

Indexed as

HerbivoryAnimalsCapsicumGas Chromatography-Mass SpectrometryPhytochemicalsPlant DiseasesPlant RootsTylenchoideaVolatile Organic CompoundsPhytochemicalsVolatile Organic Compounds

Identifiers

PMID28588235
PMCPMC5460232
OpenAlexW2617284795

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.