Evidence map›Paper›PMID 29767335›Full record

ArticlePlanta2018

Regulation of enzyme activities in carnivorous pitcher plants of the genus Nepenthes.

Michaela Saganová, Boris Bokor, Tibor Stolárik, Andrej Pavlovič

Abstract read
PubMed Publisher
In one paragraph

Article in Planta, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
7.4field-weighted citation impact, top 3% 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

24 citing papers in PubMed, 43 citations in OpenAlex.

  1. Article
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  4. The Localization of Cell Wall Components in the Whole-Mount ImmunolabeledInternational journal of molecular sciences · 2025
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

4 authors at 3 institutions in 2 countries.

Michaela SaganováDepartment of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, Mlynská dolina B2, 842 15, Bratislava, Slovakia.
Boris BokorDepartment of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, Mlynská dolina B2, 842 15, Bratislava, Slovakia.
Tibor StolárikDepartment of Plant Physiology, Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Dúbravská cesta 9, 845 23, Bratislava, Slovakia.
Andrej PavlovičDepartment of Biophysics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University Olomouc, Šlechtitelů 27, 783 71, Olomouc, Czech Republic. andrej.pavlovic@upol.cz.ORCID http://orcid.org/0000-0003-4274-2099
Comenius University Bratislava · SKCentre of the Region Haná for Biotechnical and Agricultural Research · CZSlovak Academy of Sciences · SK

Funding

European Regional Development Fund 26240220086Grantová Agentura České Republiky 16-07366YMinisterstvo Školství, Mládeže a Tělovýchovy LO1204
6 · The paper itself

Abstract

MAIN

conclusionNepenthes regulates enzyme activities by sensing stimuli from the insect prey. Protein is the best inductor mimicking the presence of an insect prey. Carnivorous plants of the genus Nepenthes have evolved passive pitcher traps for prey capture. In this study, we investigated the ability of chemical signals from a prey (chitin, protein, and ammonium) to induce transcription and synthesis of digestive enzymes in Nepenthes × Mixta. We used real-time PCR and specific antibodies generated against the aspartic proteases nepenthesins, and type III and type IV chitinases to investigate the induction of digestive enzyme synthesis in response to different chemical stimuli from the prey. Transcription of nepenthesins was strongly induced by ammonium, protein and live prey; chitin induced transcription only very slightly. This is in accordance with the amount of released enzyme and proteolytic activity in the digestive fluid. Although transcription of type III chitinase was induced by all investigated stimuli, a significant accumulation of the enzyme in the digestive fluid was found mainly after protein and live prey addition. Protein and live prey were also the best inducers for accumulation of type IV chitinase in the digestive fluid. Although ammonium strongly induced transcription of all investigated genes probably through membrane depolarization, strong acidification of the digestive fluid affected stability and abundance of both chitinases in the digestive fluid. The study showed that the proteins are universal inductors of enzyme activities in carnivorous pitcher plants best mimicking the presence of insect prey. This is not surprising, because proteins are a much valuable source of nitrogen, superior to chitin. Extensive vesicular activity was observed in prey-activated glands.

Indexed as

Gene Expression Regulation, PlantAmmonium ChlorideCarnivoryCaryophyllalesChitinEnzymesHydrogen-Ion ConcentrationMembrane PotentialsPlant ProteinsSerum Albumin, BovineAmmonium ChlorideChitinEnzymesPlant ProteinsSerum Albumin, BovineCarnivorous plantChitinChitinaseEnzymeNepenthesinPitcher plantProtease

Identifiers

PMID29767335
OpenAlexW2803991970

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.