Katharina
ActiveVitis vinifera L. · Common grape vine
Jorg Wolf, D
Variety traits
Fruit acidity
Fruit acidity is a biological trait of a variety that determines taste quality, suitability for processing, and resistance to spoilage. It is assessed via the total concentration of all acids contained in the fruit.
Mentioned in descriptions 10 508 varieties reference book.
Fruit acidity is a biochemical quality indicator reflecting the sugar-acid ratio, which shapes the taste of the produce. This parameter determines the suitability of fruits for fresh consumption or industrial processing and also influences storage life, as an increased acidity level inhibits the development of pathogenic microorganisms.
For objective evaluation, the titratable acidity index is used, representing the total concentration of free acids and their salts. In laboratory conditions, this parameter is determined by the titration method using alkaline solutions until a fixed pH level is reached. The measurement results are expressed in grams per 100 grams of product or as a percentage.
In official variety testing, acidity is evaluated as one of the key quality indicators, often in combination with sugar content via the sugar-acid ratio. The final values of the trait depend on the crop species, although they are also influenced by the maturity stage of the fruits, growing conditions, and the mineral nutrition regime of the plants.
Breakdown by crop
Grape acidity
1 160
Grape acidity
507
Acidity of apple fruit
202
Peach fruit acidity
116
Tomato Fruit Acidity
116
Blueberry fruit acidity
52
Acidity of sweet cherry fruit
32
Olive Fruit Acidity
32
Fruit Acidity — Garden Strawberry
32
Apricot fruit acidity
21
Lemon Fruit Acidity
20
Acidity of Mandarin Fruits
18
Fruit acidity — Sour cherry
17
Citrus fruit acidity
16
Orange Fruit Acidity
16
Blackberry Fruit Acidity
15
Plum fruit acidity
13
Fruit acidity — Japanese plum
13
Pear fruit acidity
12
Acidity of oat grains
9
Tomato Fruit Acidity
8
Acidity of Apple Fruit
7
Raspberry fruit acidity
7
Acidity of kiwifruit
6
Found in these crops
Varieties that feature this in their description
Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.
Itumeight
ActiveVitis L. · Grapevine
Juan Carreño Manuel Tornel
Jong 02
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Kolster Peter / Eveleens Kees
Honeystar
ActivePrunus salicina Lindl. · Japanese plum
Stargrow Group (Pty) Ltd.
HI Horizon
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
van Dijk Roy Robin
KORbaymun
ActiveRosa L. · Rose
Tim-Hermann Kordes^^^John Vincent Kordes^^^Wilhelm Kordes
Kolmgarip
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Peter Rudolf Kolster
Hbadu
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Hydrangea Breeders Association B.V.
IFG Fifteen
ActiveVitis vinifera L. · Common grape vine
David W.Cain
ICH10162B
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Toyokazu Ichie
Iasma Eco 2
ActiveVitis vinifera L. · Common grape vine
Stefanini Marco
H211905
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Hydrangea Breeders Association B.V.
GRHYAR1407
ActiveHydrangea arborescens L. · Smooth hydrangea
Rouwette Guido
HORE0034
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Nick van Rosmalen
Kaho
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
TANAKA SHINSUKE
Horwack
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Meinl Katrin
Fiammetta
ActiveVitis vinifera L. · Common grape vine
Stefano Somma
Iasma Eco 3
ActiveVitis vinifera L. · Common grape vine
Stefanini Marco
FUCIV181
ActiveMalus domestica (Suckow) Borkh. · Apple
Michelangelo Leis^^^Alessio Martinelli
Hortmaserena
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Horteve Breeding B.V.
HBA215910
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Hydrangea Breeders Association B.V.
H211906
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Hydrangea Breeders Association B.V.
Golden Orange
ActiveMalus domestica (Suckow) Borkh. · Apple
Antonio Bergamini
H216907
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Hydrangea Breeders Association B.V.