charcoal · Growth · Phoenix dactylifera (date palm)

Results differ16 papers: 15 positive, 1 negative or no effect · 1 pair of papers confirmed to differ

39 claims from these papers; 3 citations between them.

Papers whose results differ, checked claim by claim 1

1 pair of papers on this question report results that differ: an effect in one paper, the opposite effect or no effect in the other. Two model reviewers reading both claims accepted each pair.

EXPLANT RESPONSES OF AGED TREES AND OFFSHOOTS OF DATE PALM IN MICROPROPAGATION. (2008)
no changeCharcoal addition had no visible effect on root formation.
Development of a Nutrient Medium for the Growth of Date Palm (Phoenix dactylifera L.) Roots by tTissue Culture (1995)
increaseActivated charcoal stimulated growth and elongation of roots at all concentrations tested.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →

How these papers cite each other

3 citations between these papers: 3 on the same side, 0 across the two sides.

Positive result
Negative result or no effect
Citation, pointing to the cited paper
Citation across the two sides
Larger circle: more citations overall

Years run left to right. Citations come from the papers’ OpenAlex reference lists. Hover a paper to bring forward its citations; click it to open the paper.

Papers reporting a positive result 15

The Effects of Some Antioxidants on the Growth of Excised Date Palm (Phoenix dactylifera L.) Roots Cultured in Vitro · 1995
- positive
  Four grams per liter activated charcoal gave the best growth and elongation of cultured date palm roots.
- no effect
  Four grams per liter activated charcoal did not differ significantly from 10 g per liter in growth and elongation.
  compared with 10 gNo difference from an alternative treatment
Development of a Nutrient Medium for the Growth of Date Palm (Phoenix dactylifera L.) Roots by tTissue Culture · 1995
- positive
  Activated charcoal stimulated growth and elongation of excised date palm roots at all concentrations tested.
Development of a Nutrient Medium for the Growth of Date Palm (Phoenix dactylifera L.) Roots by tTissue Culture · 1995
- positive
  Activated charcoal stimulated growth and elongation of roots at all concentrations tested.
Propagation of date palm (Phoenix dactylifera) plants by using tissue culture technique · 2005
- positive
  The highest charcoal concentration of 9 g/l with NAA at 1.5 mg/l gave the best results for number of roots and root length.
A comparative study between solid and liquid cultures relative to callus growth and somatic embryo formation in date palm (Phoenix dactylifera L.) cv. Zaghlool · 2013
- positive
  Liquid MS medium with NAA and activated charcoal produced the highest embryo count, 160 from 500 mg callus.
cited by 1 paper here
Identification of the effect of different levels of activated charcoal and sucrose on multiplication shoots of date palm phenixdactylifera L.C.v. sufedy in vitro · 2013
- positive
  Combined 0.75 g/l charcoal and 65 g/l sucrose significantly increased root length to 6.9 cm.
  compared with other treatments
- positive
  Combined 0.5 g/l charcoal and 65 g/l sucrose improved elongation to 8.1 cm.
- positive
  At 0.75 g/l activated charcoal, elongation reached 7.3 cm.
- positive
  At 0.75 g/l activated charcoal, root number reached 4.6 per plantlet.
- positive
  Combined 0.5 g/l charcoal and 65 g/l sucrose improved root number to 5.3 per plantlet.
Improvement of somatic embryogenesis and plant regeneration of seven date palm (Phoenix dactylifera L.) cultivars: Effect of cytokinins and activated charcoal · 2013
- positive
  Medium with 0.05 mg/L benzyl adenine without activated charcoal significantly promoted embryos and shoots in all cultivars.
- negative
  Charcoal inhibited shoot formation except with 0.05 mg/L benzyl adenine.
cited by 1 paper here
Studies on in-vitro organogenesis in date palm · 2013
- positive
  Activated charcoal at 1.5 g l−1 was suitable for explant survival of date palm shoot tips compared with other treatments.
  compared with other treatments
- positive
  Activated charcoal at 1.5 g l−1 supported growth of date palm shoot tips for one month compared with other treatments.
  compared with other treatments
An efficient protocol for indirect somatic embryogenesis and shoot organogenesis from leaf segments of date palm (Phoenix dactylifera L.) CV. Quntar · 2015
- positive
  Temporary immersion culture yielded 172 somatic embryos from 500 mg callus.
cites 1 paper here
Micropropagation of some Sewa Oasis Date Palm (Phoenix dactylifera L.) Cultivars Grown in Egypt · 2017
- positive
  Oshkingbeel achieved 75% embryogenic callus with the stated medium.
- positive
  Sewi achieved 87.5% embryogenic callus with the stated medium.
cites 1 paper here
In vitro somatic embryogenesis response of date palm cv. Sukkary to sucrose and activated charcoal concentrations · 2017
- positive
  40 g/L sucrose and 1 g/L activated charcoal improved fresh weight of somatic embryos to 2.18 g.
  compared with other treatment combinations
- positive
  1 g/L of activated charcoal improved germination to 3.22.
  compared with other treatments
- positive
  40 g/L sucrose and 1 g/L activated charcoal improved length of somatic embryos to 1.37 cm.
  compared with other treatment combinations
- positive
  1 g/L of activated charcoal improved fresh weight to 1.29 g.
  compared with other treatments
- positive
  1 g/L of activated charcoal improved length to 0.99 cm.
  compared with other treatments
- positive
  40 g/L sucrose and 1 g/L activated charcoal improved germination of somatic embryos to 6.33.
  compared with other treatment combinations
- positive
  40 g/L sucrose and 1 g/L activated charcoal improved number of somatic embryos to 69.67.
  compared with other treatment combinations
- positive
  40 g/L sucrose and 1 g/L activated charcoal improved dry weight of somatic embryos to 0.262 g.
  compared with other treatment combinations
- positive
  1 g/L of activated charcoal improved dry weight to 0.156 g.
  compared with other treatments
Zinc Oxide Nanoparticles and Fe-Modified Activated Carbon Affecting the In Vitro Growth of Date Palm Plantlets cv. Medjool · 2022
Factors Influencing Somatic Embryogenesis and Plantlet Regeneration of Date Palm using Immature Floral Buds · 2023
- positive
  The activated charcoal medium gave 82.6% somatic embryos in Ajwa.
- positive
  The activated charcoal medium gave 83.3% somatic embryos in Begum Jungi.
cited by 1 paper here
Micropropagation of elite date palm (Phoenix dactylifera L.) cultivars Samany and Bertamoda through immature inflorescence explants · 2023
- positive
  Activated charcoal medium induced white friable embryogenic callus in cv. Samany (84%).
- positive
  Activated charcoal medium induced white friable embryogenic callus in cv. Bertamoda (69%).
cites 1 paper here
Effect of activated charcoal and subculture rates on a two-phase culture strategy involving biomass accumulation followed by phenolic production in date palm cell suspension cultures · 2025
- positive
  The staged charcoal protocol increased biomass accumulation.
- positive
  Medium without charcoal retained biomass accumulation.

Papers reporting a negative result or no effect 1

EXPLANT RESPONSES OF AGED TREES AND OFFSHOOTS OF DATE PALM IN MICROPROPAGATION. · 2008
- no effect
  Charcoal addition had no visible effect on root formation.

A paper is on the positive side when any of its claims here is positive. Claims are grouped by organism, treatment and what was measured or targeted. Claims that compare genotypes are left out; a claim about lacking a nutrient counts the other way round in that nutrient’s question. “Results differ” marks a question where two model reviewers, reading both claims, accepted at least one pair of papers whose results differ.

charcoal · Growth · Phoenix dactylifera (date palm)

Papers whose results differ, checked claim by claim 1

How these papers cite each other

Papers reporting a positive result 15

Papers reporting a negative result or no effect 1

charcoal on Phoenix dactylifera (date palm) against other targets

charcoal · growth on other organisms