Intervention effectmodel-written summary

GA3 plus NAA increased shoot length, leaf number and leaf area versus other treatments and control.

A claim from Effect of GA3 and NAA on growth, yield and fruit quality of Washington navel orange · 2017

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

GA3 plus NAA increased shoot length, leaf number and leaf area versus other treatments and control.

Taxon
Washington navel oranget0
Treatment
GA3 at 20 ppm+ NAA at 25 ppme0
Outcome
shoot length (cm), leaves number per shoot at the three growth cycles, as well as leaf area (cm2)e0
Direction
increasede0
Qualifier
one week after fruit sete0
Comparator
other treatments and controle0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValue

Verbatim

e0

“foliar spraying of trees with GA3 at 20 ppm+ NAA at 25 ppm at one week after fruit set increased significantly vegetative growth parameters such as (shoot length (cm), leaves number per shoot at the three growth cycles, as well as leaf area (cm2) compared the other treatments and control.”

✓ located verbatim in the source · abstract, characters 509–798
t0

“Washington navel orange”

✓ located verbatim in the source · title, characters 60–83

Title

Effect of GA3 and NAA on growth, yield and fruit quality of Washington navel orange

ashraf Hamdy Egyptian Journal of Horticulture 2017. doi:10.21608/ejoh.2017.950.1003

Other claims from this paper (7)

Record rev-1f3b57795647b68d09b2604b01ade53e486db81af6aad2510ea2f56c62c75770 · schema claims-v0.9 · position 1 in the model’s answer

Gibberellic acid · growth · Citrus sinensis (sweet orange)Results differ

7 papers: 5 positive, 2 negative or no effect

4 papers in the same direction as this claim · 2 in the opposite direction

  1. no effect
    Rooting measures of healthy and CVC-affected sweet orange cuttings did not differ statistically across concentrations of synthetic plant regulators.

    Rooting of healthy and CVC-affected 'Valência' sweet orange stem cuttings, through the use of plant regulators · 2006 · compared with distinct concentrations of synthetic plant regulators

    Opposite direction

  2. no effect
    GA-sprayed fruit no longer differed in size at 8.5 weeks after full bloom.

    Growth Regulator Effects on Fruit Set and Fruit Size in Navel Orange1 · 1982 · compared with untreated fruit

    Opposite direction

  3. positive
    GA 3 increased mature fruit size by 4% to 5% relative to nontreated controls.

    Effects of Exogenous Gibberellic Acid in Huanglongbing-affected Sweet Orange Trees under Florida Conditions—II. Fruit Production and Tree Health · 2022 · compared with nontreated control trees

    Same direction

  4. positive
    Soaking sweet orange seeds for 24 hours in water or various concentrations of gibberellic acid before planting increased their germination rate under cool conditions.

    Sweet orange germination and growth aided by water and gibberellin seed soak · 1969

    Same direction

  5. positive
    Presoaking cold-treated orange seeds in GA 3 increased germination rates.

    Influence of Low Temperature and Gibberellic Acid Treatment on the Germination of ‘Valencia’ Orange Seeds1 · 1982

    Same direction

  6. positive
    GA3 at G2 gave the highest significant increase in secondary shoot number, leaf number increment, and leaf area.

    EFFECT OF FOLIAR APPLICATION WITH FORCHLORFENURON AND GIBBERELLIC ACID IN VEGETATIVE GROWTH AND CHEMICAL CONTENT OF WASHINGTON NAVEL ORANGE TRANSPLANTS · 2022 · compared with control treatment

    Same direction

See all 7 papers →

1-naphthaleneacetic acid · growth · Citrus sinensis (sweet orange)Positive and negative results

8 papers: 7 positive, 1 negative or no effect

6 papers in the same direction as this claim · 1 in the opposite direction

  1. negative
    NAA applied to young Washington navel orange trees inhibited growth of untreated tree portions.

    Translocation of ΝAA in ‘Washington’ Navel Orange1 · 1978

    Opposite direction

  2. positive
    Washington Navel orange reached maximum shoot induction of 66.9% on the specified DKW medium.

    High-efficiency Propagation of Mature ‘Washington Navel’ Orange and Juvenile ‘Carrizo’ Citrange Using Axillary Shoot Proliferation · 2016

    Same direction

  3. positive
    BAP, Kin and NAA gave the maximum shoot length on the multiplication medium.

    Micropropagation of sweet orange cv. Mosambi through shoot tips and nodal segments. · 2010

    Same direction

  4. positive
    Root development was maximum with NAA 0.5 mg/litre plus IBA 0.5–1.0 mg/litre.

    In vitro plant regeneration in sweet orange (Citrus sinensis L. Osbeck.) cv. Mosambi and Jaffa · 2001

    Same direction

  5. positive
    Two sprays of urea, micronutrients and NAA at 10 ppm gave the highest average leaf area and shoot diameter in both seasons in navel orange trees.

    Effect of Urea, Some Micronutrients, and Growth-regulator Foliar Sprays on the Yield, Fruit Quality, and Some Vegetative Characteristics of `Washington' Navel Orange Trees—Vegetative Growth and Mineral Leaf Content · 1995

    Same direction

  6. positive
    NAA produced high leaf area and shoot diameter.

    EFFECT OF UREA, SOME MICRONUTRIENTS AND TWO GROWTH REGULATORS FOLIAR SPRAYS ON VEGETATIVE GROWTH, YIELD AND FRUIT QUALITY OF WASHINGTON NAVEL ORANGE TREES · 2011

    Same direction

  7. positive
    The BAP and NAA medium yielded 5.55 shoots per Mosambi explant.

    In-vitro propagation of citrus: Protocol development for regeneration and multiple shoot induction from nodal segments · 2025

    Same direction

See all 8 papers →

Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.