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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.

Sources10

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

Grapevine 1 163 Common grape vine 507 Apple 505 Bigleaf hydrangea 301 Tomato 238 Peach 194 European pear 127 Sweet cherry 122 Garden strawberry 86 Highbush blueberry 77 Apricot 58 European plum 48

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.

Glen Ora Late

Active

Citrus sinensis (L.) Osbeck · Sweet orange

Elbert de Kock

ES
6 records

RYOKU NH-12

Active

Vaccinium corymbosum L. · Highbush blueberry

Shigetaka Sakurai, Nippon Ryokusan Co., Ltd.

4 records

44-53 M

Active

Vitis L. · Grapevine

INCONNU (FR)

FR
3 records

IFG Twenty-one

Active

Hybrids between Vitis vinifera and Vitis labrusca

David W.Cain

3 records

C01 43

Active

Vaccinium corymbosum L. · Highbush blueberry

Gary Wright Paul M. Lyrene

4 records

Natsu no shizuku

Active

Fragaria x ananassa Duchesne ex Rozier · Garden strawberry

National Agriculture and Food Research Organization and Iwate Prefecture

3 records

C97-41

Active

Vaccinium corymbosum L. · Highbush blueberry

Gary Wright et Paul Lyrene

3 records

SIROCO 5

Active

Prunus persica (L.) Batsch · Peach

J.E.COS / A. CARRILLO / A.GUEVARA (IMIDA)

ES
4 records

Winter Star

Active

Fragaria x ananassa Duchesne ex Rozier · Garden strawberry

Florida Foundation Seed Producers

ES
2 records

PRO_279

Active

Prunus persica (L.) Batsch · Peach

VIVEROS PROVEDO, S.A.

ES
3 records

SAN ROQUEÑA

Active

Malus domestica (Suckow) Borkh. · Apple

SERIDA

ES
3 records

SIROCO 30

Active

Prunus persica (L.) Batsch · Peach

J.E.COS / A. CARRILLO / A.GUEVARA (IMIDA)

ES
5 records

PRO 618

Active

Prunus persica (L.) Batsch · Peach

VIVEROS PROVEDO, S.A.

ES
5 records

PRO 716

Active

Prunus persica (L.) Batsch · Peach

VIVEROS PROVEDO, S.A.

ES
4 records

PRO 486

Active

Prunus persica (L.) Batsch · Peach

VIVEROS PROVEDO, S.A.

ES
6 records

CLEMEN PONS

Active

Citrus clementina hort. ex Tanaka · Clementine

JUAN PONS BOLTA

ES
4 records

FORNER ALCAIDE V 17

Active

Hybrids between Citrus x aurantium L. x Citrus trifoliata L.

VARIOS OBTENTORES

ES
2 records

NS14 4

Application submitted

Vaccinium corymbosum L. · Highbush blueberry

Vincent David Andrew Mazzardis

5 records

ALISIO_20

Active

Prunus persica (L.) Batsch · Peach

J.E.COS / A. CARRILLO / A.GUEVARA (IMIDA)

ES
4 records

MG11543-23-004

Application submitted

hybrids between Vaccinium corymbosum L. and Vaccinium darrowii Camp

Ridley Bell, Joel Deveson

2 records

UF 914

Application submitted

Hybrids between Citrus paradisi Macfad. and Citrus maxima (Burm.) Merr.

Gmitter, JR. Frederick G.

2 records

Aika No Kaori

Active

Malus domestica (Suckow) Borkh. · Apple

FUJIMAKI HIDEO

3 records

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