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.

Mècle N

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Merrygold

Application submitted

Solanum lycopersicum L. · Tomato

BURPEE NL B.V.

2 records

Melnik 55

Active

Vitis vinifera L. · Common grape vine

Georgi Karamitov, Zdravko Zankov, Yane Atanasov

1 record

Misket vrachanski N 12

Active

Vitis vinifera L. subsp. vinifera · Wine grape

Institute of viticulture and enology - Pleven (BG)

1 record

Misket varnenski

Active

Vitis vinifera L. · Common grape vine

Zdravko Zankov, Yordan Ivanov, Kunyu Stoev, Stoyanka Cherneva

1 record

Merlese

Application submitted

Vitis vinifera L. · Common grape vine

COLUCCI EMILIA / FILIPPETTI ILARIA / INTRIERI CESARE

1 record

Melrom

Active

Aronia melanocarpa (Michx.) Elliott · Black chokeberry

ANCU IRINAMLADIN GHEORGHESTURZEANU MONICAISAC VALENTINA

2 records

Meslier Saint-François

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Merveille Blanche

Terminated

Solanum lycopersicum L. · Tomato

Domaine Public (FR)

1 record

Mansois

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Mauzac

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Magdeleine noire

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Madeleine angevine

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Meduviai

Terminated

Onobrychis viciifolia Scop. · Common sainfoin

Lietuvos agrarinių ir miškų mokslų centro Vokės filialas

1 record

Luci

Terminated

Rhododendron simsii Planch. · Indica azalea

GLASER| Karl Glaser

1 record

MARINA RION

Active

Vitis vinifera L. · Common grape vine

ALBET I NOYA VITICULTOR, S.L.

1 record

Maréchal Foch

Active

Vitis L. · Grapevine

INCONNU (FR)

1 record

Manseng noir

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Malvasia Fina

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Mariensteiner

Protection expired

Vitis vinifera L. · Common grape vine

LAND BAYERN WUERZBURG| Land Bayern, vertreten durch Bayerische Landesanstalt fuer Weinbau und Gartenbau - Abt. Weinbau und Oenologie -

2 records

Loin de l'Oeil

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Listan

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Liliorila

Active

Vitis vinifera L. · Common grape vine

INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR

2 records

Len de l'El

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

1 2 ... 70 71 72 73 74 75 76 ... 175 176 Next

Jump to page 25 50 63 83 101 126 151 173

Variety traits

Maturity group 89 063
Yield 67 000
Vigor 53 548
Plant height 51 504
Lodging 50 198
Taste and aroma 36 010
Variety origin 29 523
Productivity 27 845

All terms →

Text source

This summary is compiled from the publications listed in the sources and verified by an editor. It contains no legally significant information; it provides agronomic context for registry data rather than the registry data itself.