Abstract
In the current study, we endeavored to assess the impact of grafting with three grape rootstocks namely (Freedom, Richter 110R and SO4) on yield, quality and accumulation of bioactive compounds in "Starlight “grape cultivar. We conducted the experiment over the course of the principal growing seasons in 2024 and 2025. Four treatments as follow (Control (un-grafted), grafted on Freedom rootstock, grafted on Richter 110R rootstock, and grafted on SO4 rootstock) were applied on 7-year-old vines, located at a private farm in Menia Governorate. Our findings indicated that grafting 'Starlight' grapevine cultivars onto various rootstocks generally enhanced their growth, fruit yield, quality and accumulation of bioactive compounds (Proline, Total phenolics and Tannins). Specifically, results have shown that vines grafted onto Freedom rootstock can lead to higher yields and larger vine vigor. Besides, it significantly boosts shoot growth and leaf area, improve berry size and weight, surpassing other rootstocks and those grown from their own roots. In contrast to the minimal growth observed with SO4 rootstock. Chemically, 'Starlight' vines grafted onto Freedom rootstock showcased the highest levels of Total Soluble Solids (TSS%) and TSS/acid ratio, whereas, it was the lowest in acidity percentage in the juice of berries, contributing to sweeter grapes with better coloration and anthocyanin content. Additionally, Richter 110R rootstock led to a higher accumulation of bioactive compounds compared to SO₄ and Freedom, with SO₄ outperforming Freedom in Proline and Tannins.
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Claims 9
Claim · model-written summary
Grafting onto various rootstocks generally enhanced growth, fruit yield and quality.
- Taxon
- Grapet0
- Material
- 'Starlight'e0
- Treatment
- graftinge0
- Outcome
- growth, fruit yield, qualitye0
- Direction
- enhancede0
Not reportedComparator
Verbatim
e0“grafting 'Starlight' grapevine cultivars onto various rootstocks generally enhanced their growth, fruit yield, quality and accumulation of bioactive compounds (Proline, Total phenolics and Tannins).”
t0““Starlight” Grape”
Claim · model-written summary
Grafting enhanced accumulation of proline, total phenolics and tannins.
- Taxon
- Grapet0
- Material
- 'Starlight'e0
- Treatment
- graftinge0
- Outcome
- accumulation of bioactive compounds (Proline, Total phenolics and Tannins)e0
- Direction
- enhancede0
Not reportedComparator
Verbatim
e0“grafting 'Starlight' grapevine cultivars onto various rootstocks generally enhanced their growth, fruit yield, quality and accumulation of bioactive compounds (Proline, Total phenolics and Tannins).”
t0““Starlight” Grape”
Claim · model-written summary
Freedom rootstock gave higher yields and vine vigor.
- Taxon
- Grapet0
- Treatment
- grafted onto Freedom rootstocke0
- Outcome
- yields and larger vine vigore0
- Direction
- highere0
Not reportedComparator
Verbatim
e0“vines grafted onto Freedom rootstock can lead to higher yields and larger vine vigor.”
t0““Starlight” Grape”
Claim · model-written summary
SO4 rootstock produced minimal vine growth.
Verbatim
e0“minimal growth observed with SO4 rootstock”
t0““Starlight” Grape”
Claim · model-written summary
Freedom rootstock produced the highest total soluble solids and TSS to acid ratio.
- Taxon
- Grapet0
- Material
- 'Starlight'e0
- Treatment
- grafted onto Freedom rootstocke0
- Outcome
- Total Soluble Solids (TSS%) and TSS/acid ratioe0
- Direction
- higheste0
Not reportedComparator
Verbatim
e0“'Starlight' vines grafted onto Freedom rootstock showcased the highest levels of Total Soluble Solids (TSS%) and TSS/acid ratio”
t0““Starlight” Grape”
Claim · model-written summary
Freedom rootstock yielded the lowest berry juice acidity.
- Taxon
- Grapet0
- Material
- 'Starlight'e0
- Treatment
- grafted onto Freedom rootstocke0
- Outcome
- acidity percentage in the juice of berriese0
- Direction
- loweste0
Not reportedComparator
Verbatim
e0“'Starlight' vines grafted onto Freedom rootstock showcased the highest levels of Total Soluble Solids (TSS%) and TSS/acid ratio, whereas, it was the lowest in acidity percentage in the juice of berries”
t0““Starlight” Grape”
Claim · model-written summary
Freedom rootstock was associated with sweeter, better colored grapes and anthocyanin content.
Verbatim
e0“contributing to sweeter grapes with better coloration and anthocyanin content”
e1“'Starlight' vines grafted onto Freedom rootstock”
Claim · model-written summary
Richter 110R led to higher bioactive compound accumulation than SO4 and Freedom.
Verbatim
e0“Richter 110R rootstock led to a higher accumulation of bioactive compounds compared to SO₄ and Freedom”
t0““Starlight” Grape”
Claim · model-written summary
SO4 exceeded Freedom in proline and tannins.
Verbatim
e0“SO₄ outperforming Freedom in Proline and Tannins”
t0““Starlight” Grape”
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