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.
Vitis vinifera L. · Common grape vine
Simone Diego Castellarin^^^Guido Cipriani^^^Michele Morgante^^^Enrico Peterlunger^^^Raffaele Testolin^^^Gabriele Di Gaspero
Prunus persica (L.) Batsch · Peach
Maillard Laurence / Maillard Arsene
Hydrangea L. · Hydrangea
HIROSHI EBIHARA
Trifolium pratense L. · Red clover
TURF-SEED INC
Solanum lycopersicum L. · Tomato
Syngenta Crop Protection AG
Malus Mill. · Apple
M. Doyle Fleming Caudle Apple Inc.
Malus domestica (Suckow) Borkh. · Apple
IFO SARL (FR)
Citrus sinensis (L.) Osbeck · Sweet orange
Mr Hendrik Johannes Smith
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
University of Georgia, Department of Horticulture
Cucumis melo L. · Melon
THE STATE OF ISRAEL-MINISTRY OF AGRICULTURE AND RURAL DEVELOPMENT-AGRICULTURAL RESEARCH ORGANIZATION( ARO)
Malus domestica (Suckow) Borkh. · Apple
ARC INFRUTEC NIETVOORBIJ
Malus domestica (Suckow) Borkh. · Apple
Zouk B.V.B.A
Actinidia chinensis Planch. x Actinidia deliciosa (A. Chev.) C. F. Liang & A. R. Ferguson
The New Zealand Institute for Plant and Food Research
Helleborus L. · Christmas Rose
Eternal Plants Boijl B.V.
Calibrachoa Cerv. · Calibrachoa
Takeshi Kanaya
Calibrachoa Cerv. · Calibrachoa
Takeshi Kanaya
Vitis vinifera L. · Common grape vine
Terry A Bacon
Malus domestica (Suckow) Borkh. · Apple
Takao Takano
Calibrachoa Cerv. · Calibrachoa
Yasuyuki Murakami
Malus domestica (Suckow) Borkh. · Apple
MCKENZIE JOY^^^Allan G. White
Euphorbia pulcherrima Willd. ex Klotzsch · Poinsettia
von Tubeuf Guido
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
Fresh Forward Holding B.V., 6851 ET Huissen
Rubus idaeus L. · Red raspberry
Thompson Ellen
Rubus idaeus L. · Red raspberry
Marionnet SAS