Variety traits
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.
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.
Rubus L. · Blackberry
THE KENT INCORPORATED SOCIETY
Solanum lycopersicum L. · Tomato
ReinSaat KG
Solanum lycopersicum L. · Tomato
HAZERA GENETICS
Malus domestica (Suckow) Borkh. · Apple
Domaine Public (FR)
Solanum lycopersicum L. · Tomato
Graines Gautier SA (FR)
Vitis L. · Grapevine
Šlechtitelská stanice vinařská Velké Pavlovice, a.s. (CZ)
Solanum lycopersicum L. · Tomato
Vilmorin SA (FR)
Vitis L. · Grapevine
INCONNU (FR)
Solanum lycopersicum L. · Tomato
SEMILLAS FITO, S.A.
Hybrids between Citrus reticulata Blanco and Citrus sinensis (L.) Osbeck · Orange
Craig Robert Pressler
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Yasuhiro Takahashi
Vitis L. · Grapevine
INCONNU (FR)
Malus domestica (Suckow) Borkh. · Apple
Simone Bühlmann-Schütz Agroscope
Prunus persica (L.) Batsch · Peach
Floyd Zaiger
Prunus salicina Lindl. · Japanese plum
Joseph Ben-Dor
Vitis vinifera L. · Common grape vine
Bundesrepublik Deutschland vertreten durch Julius Kühn-Institut, Institut National de Recherche pour l'Agriculture l'Alimentation et l'Environnement (INRAE)
Prunus salicina Lindl. · Japanese plum
Terry A. Bacon^^^David W. Cain
Acer palmatum Thunb. · Japanese maple
Piet Vergeldt Onroerend Goed B.V.
Prunus salicina Lindl. · Japanese plum
Terry A Bacon
Echinacea Moench. · Coneflower
Kees van den Aardwegh
Citrus L. · Citrus
Pinchas Spiegel-Roy^^^Avraham Elhanati^^^Aliza Vardi
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
van Straaten V.O.F.
Malus domestica (Suckow) Borkh. · Apple
Vivai Griba Cooperativa e Società Agricola
Prunus x limeixing (J. Y. Zhang & Z. M. Wang) Y. H. Tong & N. H. Xia
Terry A Bacon