Vitis vinifera

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Vitis vinifera
Cabernet Sauvignon Gaillac.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Vitales
Family: Vitaceae
Genus: Vitis
Species:
V. vinifera
Binomial name
Vitis vinifera
L.

Vitis vinifera, the common grape vine, is a species of flowering plant, native to the Mediterranean region, Central Europe, and southwestern Asia, from Morocco and Portugal north to southern Germany and east to northern Iran. [2] As of 2012, there were between 5,000 and 10,000 varieties of Vitis vinifera grapes though only a few are of commercial significance for wine and table grape production. [3]

Contents

The wild grape is often classified as Vitis viniferasylvestris (in some classifications considered Vitis sylvestris), with Vitis viniferavinifera restricted to cultivated forms. Domesticated vines have hermaphrodite flowers, but sylvestris is dioecious (male and female flowers on separate plants) and pollination is required for fruit to develop.

Grapes can be eaten fresh or dried to produce raisins, sultanas, and currants. Grape leaves are used in the cuisine of many cultures. The fresh grapes can also be processed into juice that is fermented to make wine and vinegar. Cultivars of Vitis vinifera form the basis of the majority of wines produced around the world. All of the familiar wine varieties belong to Vitis vinifera, which is cultivated on every continent except for Antarctica, and in all the major wine regions of the world.

History

Prehistory

Changes in pip (seed) shape (narrower in domesticated forms) and distribution point to domestication occurring about 4100–3000 BC, [4] in southwest Asia, South Caucasus (Armenia [5] [6] and Georgia), or the Western Black Sea shore region (Bulgaria, Romania). The earliest evidence of domesticated grapes has been found at Gadachrili Gora, near the village of Imiri, Marneuli Municipality, in southeastern Georgia; carbon-dating points to the date of about 6000 BC. The oldest winery in the world (dating to 4100BCE) was found in the Areni-1 cave, which lies in Areni, Armenia. [7] [6] Grape pips dating back to the 5th–4th millennium BC were also found in Shulaveri; others dating back to the 4th millennium BC were also found in Khizanaant Gora. Wild grapes were harvested by neolithic foragers and early farmers. For thousands of years, the fruit has been harvested for both medicinal and nutritional value; its history is intimately entwined with the history of wine. [8]

Antiquity

Cultivation of the domesticated grape spread to other parts of the Old World in pre-historic or early historic times. [9] The first written accounts of grapes and wine can be found in the Epic of Gilgamesh , an ancient Sumerian text from the 3rd millennium BC. There are also numerous hieroglyphic references from ancient Egypt, according to which wine was reserved exclusively for priests, state functionaries and the pharaoh. [10]

The grapevine is referenced 55 times in the Hebrew Bible (Old Testament), along with grapes and wine, which are also frequently mentioned (55 and 19, respectively). [11] The Bible lists the grapevine as one of the Seven Species of the Land of Israel, [12] [11] and frequently uses it as a symbol of the Israelites as the chosen people. [13] A detailed description of vineyard maintenance is provided in the Book of Isaiah (5:1–7). [14]

Grape harvest on Etruscan terracotta from the 6th century BC Cup vintage Cdm Paris 320 n4.jpg
Grape harvest on Etruscan terracotta from the 6th century BC

Hesiod in his Works and Days gives detailed descriptions of grape harvests and wine making techniques, and there are also many references in Homer. Greek colonists then introduced these practices in their colonies, especially in southern Italy (Magna Graecia), which was even known as Enotria due to its propitious climate.

The Etruscans improved wine making techniques and developed an export trade even beyond the Mediterranean basin. [15] The ancient Romans further developed the techniques learnt from the Etruscans, as shown by numerous works of literature containing information that remains valid: De Agri Cultura (around 160 BC) by Cato the Elder, De re rustica by Marcus Terentius Varro, the Georgics by Virgil and De re rustica by Columella.[ citation needed ]

During the 3rd and 4th centuries AD, the long crisis of the Roman Empire generated instability in the countryside which led to a reduction of viticulture in general, which was mainly sustained only close to towns and cities and along coastlines.[ citation needed ]

Medieval era

Between the 5th and 10th centuries, viticulture was sustained almost exclusively by the different religious orders in monasteries. The Benedictines and others extended the grape growing limit northwards and also planted new vineyards at higher altitudes than was customary before. Apart from 'ecclesiastical' viticulture, there also developed, especially in France, a 'noble' viticulture, practiced by the aristocracy as a symbol of prestige. [16] [17] Grape growing was a significant economic activity in the Middle east up to the 7th century, when the expansion of Islam caused it to decline. [18]

Vineyard in Burgundy Vergy-vignes.jpg
Vineyard in Burgundy

Early modern period

Between the Low Middle Ages and the Renaissance, viticulture began to flourish again. Demographic pressure, population concentration in towns and cities, and the increased spending power of artisans and merchants gave rise to increased investment in viticulture, which became economically feasible once more.[ citation needed ] Much was written during the Renaissance on grape growing and wine production, favouring a more scientific approach. This literature can be considered the origin of modern ampelography.[ citation needed ]

Grapes followed European colonies around the world, coming to North America around the 17th century, and to Africa, South America and Australia. In North America it formed hybrids with native species from the genus Vitis; some of these were intentional hybrids created to combat phylloxera , an insect pest which affected the European grapevine to a much greater extent than North American ones and in fact managed to devastate European wine production in a matter of years. Later, North American rootstocks became widely used to graft V. vinifera cultivars so as to withstand the presence of phylloxera. [19]

Contemporary period

Genomic information
NCBI genome ID 401
Ploidy diploid
Genome size about 500 Mb
Number of chromosomes 19 pairs
Year of completion 2008
Sequenced organelle plastid

In the second half of the 20th century there was a shift in attitude in viticulture from traditional techniques to the scientific method based on fields such as microbiology, chemistry and ampelography. This change came about also due to changes in economic and cultural aspects and in the way of life and in the consumption habits of wide sectors of the population starting to demand quality products.[ citation needed ]

In 2007, Vitis vinifera was the fourth angiosperm species whose genome was completely sequenced. These data contributed significantly to understanding the evolution of plants and also how the aromatic characteristics of wine are determined in part by the plant's genes. [20] This work was a collaboration between Italian researchers (Consorzio Interuniversitario Nazionale per la Biologia Molecolare delle Piante, Istituto di Genomica Applicata) and French researchers (Genoscope and Institut National de la Recherche Agronomique).

Also in 2007, scientists from Australia's Commonwealth Scientific and Industrial Research Organisation (CSIRO), working in the Cooperative Research Centre for Viticulture, reported that their "research suggests that extremely rare and independent mutations in two genes [VvMYBA1 and VvMYBA2 of red grapes] produced a single white grapevine that was the parent of almost all of the world's white grape varieties. If only one gene had been mutated, most grapes would still be red and we would not have the more than 3000 white grape cultivars available today." [21] [22]

Description

Leaves and inflorescences Vigne en fleur.JPG
Leaves and inflorescences

It is a liana growing 12–15 m (39–49 ft) tall at a fast rate. [23] [24] Having a flaky bark, its leaves are alternate, palmately lobed, deciduous, with 3 to 5 pointed lobes, coarsely prickly-toothed leaf margins and a heart-shaped foot, 5–20 cm (2.0–7.9 in) long and broad. They are glossy dark green on top, light green below, usually hairless.

The vine attaches to supports by tendrils. The stems, called twigs, grow through their tip, the cauline apex. A branch consists of several internodes separated by knots, which grow the leaves, flowers, tendrils and between-core and where to train future buds. During their hardening, the twigs become woody branches that can reach a great length. Its roots usually sink to a depth of 2 to 5 meters and sometimes up to 12–15 meters or even more.

The species typically occurs in humid forests and streamsides.

Inflorescences

Their flowers, small and greenish to white, are grouped in inflorescences and their fruits, of different shapes depending on the subspecies, are berries grouped in clusters. The calyx is single-leaf with 5 short, deciduous teeth. The corolla consists of five petals, fused at the top and base, and then falls off in its entirety. Opposite the petals there are five stamens interspersed with glands. The upper ovary bears a very short style with a button-shaped stigma. The wild vine is a dioecious plant, the male and female flowers arise on different plants, but the cultivated forms are hermaphroditic, allowing self-pollination.

The fruit is a berry, known as a grape that is ovoid or globular, dark blue or greenish, usually 2-locular with 5 seeds; in the wild species it is 6 mm (0.24 in) diameter and ripens dark purple to blackish with a pale wax bloom; in cultivated plants it is usually much larger, up to 3 cm (1.2 in) long, and can be green, red, or purple (black).

Distribution

V. vinifera accounts for the majority of world wine production; all of the most familiar grape varieties used for wine production belong to V. vinifera. [25]

In Europe, Vitis vinifera is concentrated in the central and southern regions; in Asia, in the western regions such as Anatolia, the Caucasus, the Middle East, and in China; in Africa, along the northern Mediterranean coast and in South Africa; in North America, in California and also other areas like Michigan, New Mexico, New York, Oregon, Washington state, British Columbia, Ontario and Québec; in South America in Chile, Argentina, Uruguay, Peru and Brazil; and in Oceania in Australia and New Zealand.

Cultivation

A cultivated Common Grape Vine, Vitis vinifera subsp. vinifera Grapess.jpg
A cultivated Common Grape Vine, Vitis vinifera subsp. vinifera

Use of grapes is known to date back to Neolithic times, following the discovery in 1996 of 7,000-year-old wine storage jars in present-day northern Iran. [26] Further evidence shows the Mesopotamians and Ancient Egyptians had vine plantations and winemaking skills. Greek philosophers praised the healing powers of grapes both whole and in the form of wine. Vitis vinifera cultivation and winemaking in China began during the Han dynasty in the 2nd century [27] with the importation of the species from Ta-Yuan. However, wild vine "mountain grapes" like Vitis thunbergii were being used for wine making before that time. [28] In traditional medicine of India V. vinifera is used in prescriptions for cough, respiratory tract catarrh, subacute cases of enlarged liver and spleen, as well as in alcohol-based tonics (Aasavs). [29]

In the Mediterranean Basin, leaves and young stems are traditionally used to feed sheep and goats after grapevine pruning. [30]

Using the sap of grapevines, European folk healers sought to cure skin and eye diseases. Other historical uses include the leaves being used to stop bleeding, pain and inflammation of hemorrhoids. Unripe grapes were used for treating sore throats, and raisins were given as treatments for consumption (tuberculosis), constipation and thirst. Ripe grapes were used for the treatment of cancer, cholera, smallpox, nausea, skin and eye infections as well as kidney and liver diseases.

Seedless grape varieties were developed to appeal to consumers, but researchers are now discovering that many of the healthful properties of grapes may actually come from the seeds themselves, thanks to their enriched phytochemical content. [31] [32]

Grapevine leaves are filled with minced meat (such as lamb, pork or beef), rice and onions in the making of Balkan traditional dolma.

A popular cultivar in Australia, Vitis 'Ornamental Grape' , derived from Vitis vinifera x Vitis rupestris, is used in gardens for its impressive foliage that turn brilliant red, scarlet, purple and/or orange in autumn. Originally bred in France, it thrives in a range of climates from hot and dry, to cool moist and subtropical, with different soil types benefitting the plant. [33]

Climate change

Chardonnay grapes which had been damaged by heat from sunburn. Damaged and sunburnt Chardonnay clusters.JPG
Chardonnay grapes which had been damaged by heat from sunburn.

Grapevines are very responsive to their surrounding environment with a seasonal variation in yield of 32.5%. [34] Climate is one of the key controlling factors in grape and wine production, [35] affecting the suitability of certain grape varieties to a particular region as well as the type and quality of the wine produced. [36] [37] Wine composition is largely dependent on the mesoclimate and the microclimate and this means that for high quality wines to be produced, a climate-soil-variety equilibrium has to be maintained. The interaction between climate-soil-variety will in some cases come under threat from the effects of climate change. Identification of genes underlying phenological variation in grape may help to maintain consistent yield of particular varieties in future climatic conditions. [38]

Of all environmental factors, temperature seems to have the most profound effect on viticulture as the temperature during the winter dormancy affects the budding for the following growing season. [39] Prolonged high temperature can have a negative impact on the quality of the grapes as well as the wine as it affects the development of grape components that give colour, aroma, accumulation of sugar, the loss of acids through respiration as well as the presence of other flavour compounds that give grapes their distinctive traits. Sustained intermediate temperatures and minimal day-to-day variability during the growth and ripening periods are favourable. Grapevine annual growth cycles begin in spring with bud break initiated by consistent day time temperatures of 10 degrees Celsius. [40] The unpredictable nature of climate change may also bring occurrences of frosts which may occur outside of the usual winter periods. Frosts cause lower yields and effects grape quality due to reduction of bud fruitfulness and therefore grapevine production benefits from frost free periods.

Organic acids are essential in wine quality. The phenolic compounds such as anthocyanins and tannins help give the wine its colour, bitterness, astringency and anti-oxidant capacity. [41] Research has shown that grapevines exposed to temperature consistently around 30 degrees Celsius had significantly lower concentrations of anthocyanins compared to grapevines exposed to temperatures consistently around 20 degrees Celsius. [42] Temperatures around or exceeding 35 degrees Celsius are found to stall anthocyanin production as well as degrade the anthocyanins that are produced. [43] Furthermore, anthocyanins were found to be positively correlated to temperatures between 16 – 22 degrees Celsius from veraison (change of colour of the berries) to harvest. [44] Tannins give wine astringency and a "drying in the mouth" taste and also bind onto anthocyanin to give more stable molecular molecules which are important in giving long term colour in aged red wines. [45] As the presence of phenolic compounds in wine are affected heavily by temperature, an increase in average temperatures will affect their presence in wine regions and will therefore affect grape quality.

Altered precipitation patterns are also anticipated (both annually and seasonally) with rainfall occurrences varying in amount and frequency. Increases in the amount of rainfall have will likely cause an increase in soil erosion; while occasional lack of rainfall, in times when it usually occurs, may result in drought conditions causing stress on grapevines. [46] Rainfall is critical at the beginning of the growing season for the budburst and inflorescence development while consistent dry periods are important for the flowering and ripening periods. [47]

Increased CO2 levels will likely have an effect on the photosynthetic activity in grapevines as photosynthesis is stimulated by a rise in CO2 and has been known to also lead to an increase leaf area and vegetative dry weight. [48] Raised atmospheric CO2 is also believed to result in partial stomatal closure which indirectly leads to increased leaf temperatures. A rise in leaf temperatures may alter ribulose 1,5-bisphosphate carboxylase/oxygenase (RuBisCo) relationship with carbon dioxide and oxygen which will also affect the plants' photosynthesis capabilities. [46] Raised atmospheric carbon dioxide is also known to decrease the stomatal density of some grapevine varieties. [49]

Cultivation variations

The gradually increasing temperatures will lead to a shift in suitable growing regions. [50] It is estimated that the northern boundary of European viticulture will shift north 10 to 30 kilometres (6.2 to 18.6 mi) per decade up to 2020 with a doubling of this rate predicted between 2020 and 2050. [51] [ needs update ] This has positive and negative effects, as it opens doors to new cultivars being grown in certain regions but a loss of suitability of other cultivars and may also risk production quality and quantity in general. [52] [50]

Adapting wine production

Systems have been developed to manipulate the temperatures of vines. These include a chamber free system where air can be heated or cooled and then blown across grape bunches to get a 10 °C (50 °F) differential. [53] Mini chambers combined with shade cloth and reflective foils have also been used to manipulate the temperature and irradiance. [54] Using polyethylene sleeves to cover cordons and canes were also found to increase maximum temperature by 5–8 °C (41–46 °F) and decrease minimum temperature by 1–2 °C (34–36 °F). [55]

Chemistry

Young grapevine buds and leaves Young grapevine leaves 1.jpg
Young grapevine buds and leaves

Phenolics

V. vinifera contains many phenolic compounds. [56] Anthocyanins can be found in the skin of the berries, hydroxycinnamic acids in the pulp and condensed tannins of the proanthocyanidins type in the seeds. Stilbenoids can be found in the skin and in wood.

Stilbenoids

Trans-resveratrol is a phytoalexin produced against the growth of fungal pathogens such as Botrytis cinerea [57] and delta-viniferin is another grapevine phytoalexin produced following fungal infection by Plasmopara viticola . [58]

Anthocyanins

Vitis vinifera red cultivars are rich in anthocyanins that impart their colour to the berries (generally in the skin). The 5 most basic anthocyanins found in grape are:

Cultivars like Graciano [59] [60] may also contain :

acetylated anthocyanins
coumaroylated anthocyanins
caffeoylated anthocyanins

Other chemicals

Isoprenoid monoterpenes are present in grape, above all acyclic linalool, geraniol, nerol, citronellol, homotrienol and monocyclic α-terpineol, mostly occurring as glycosides. Carotenoids accumulate in ripening grape berries. Oxidation of carotenoids produces volatile fragments, C13-norisoprenoids. These are strongly odoriferous compounds, such as β-ionone (aroma of viola), damascenone (aroma of exotic fruits), β-damascone (aroma of rose) and β-ionol (aroma of flowers and fruits). Melatonin, an alkaloid, has been identified in grape. [61] In addition, seeds are rich in unsaturated fatty acids, which helps lowering levels of total cholesterol and LDL cholesterol in the blood. [56]

See also

Related Research Articles

<span class="mw-page-title-main">Grape</span> Fruit growing on woody vines in clusters

A grape is a fruit, botanically a berry, of the deciduous woody vines of the flowering plant genus Vitis. Grapes are a non-climacteric type of fruit, generally occurring in clusters.

<span class="mw-page-title-main">Viticulture</span> Cultivation and harvesting of grapes

Viticulture, viniculture, or winegrowing is the cultivation and harvesting of grapes. It is a branch of the science of horticulture. While the native territory of Vitis vinifera, the common grape vine, ranges from Western Europe to the Persian shores of the Caspian Sea, the vine has demonstrated high levels of adaptability to new environments, hence viticulture can be found on every continent except Antarctica.

<i>Vitis rotundifolia</i> Variety of grape

Vitis rotundifolia, or muscadine, is a grapevine species native to the southeastern and south-central United States. The growth range extends from Florida to New Jersey coast, and west to eastern Texas and Oklahoma. It has been extensively cultivated since the 16th century. The plants are well-adapted to their native warm and humid climate; they need fewer chilling hours than better known varieties, and thrive in summer heat.

<span class="mw-page-title-main">Tempranillo</span> Variety of grape

Tempranillo is a black grape variety widely grown to make full-bodied red wines in its native Spain. Its name is the diminutive of the Spanish temprano ("early"), a reference to the fact that it ripens several weeks earlier than most Spanish red grapes. Tempranillo has been grown on the Iberian Peninsula since the time of Phoenician settlements. It is the main grape used in Rioja, and is often referred to as Spain's noble grape. The grape has been planted throughout the globe's wine regions.

<span class="mw-page-title-main">Catawba (grape)</span> Variety of grape

Catawba is a red American grape variety used for wine as well as juice, jams and jellies. Grown predominantly on the East Coast of the United States, this purplish-red grape is a likely a hybrid of the native American Vitis labrusca and the Vitis vinifera cultivar Semillon. Its exact origins are unclear but it seems to have originated somewhere on the East coast from the Carolinas to Maryland.

<i>Vitis labrusca</i> Species of grapevine

Vitis labrusca, the fox grape, is a species of grapevines belonging to the Vitis genus in the flowering plant family Vitaceae. The vines are native to eastern North America and are the source of many grape cultivars, including Catawba, Concord, Delaware, Isabella, Niagara, and many hybrid grape varieties such as Agawam, Alexander and Onaka. Among the characteristics of this vine species in contrast to the European wine grape Vitis vinifera are its "slip-skin" that allows the skin of the grape berries to easily slip off when squeezed, instead of crushing the pulp, and the presence of tendrils on every node of the cane. Another contrast with European vinifera is the characteristic "foxy" musk of V. labrusca, best known to most people through the Concord grape. This musk is not related to the mammalian fox, but rather to the strong, earthy aromas characteristic of the grapes that were known by early European-American settlers in the New World. The term "foxy" became a sort of catchall for the wine tasting descriptors used for these American wines that were distinct from the familiar flavors of the European viniferous wines.

<span class="mw-page-title-main">International Grape Genome Program</span>

The International Grape Genomics Program (IGGP) is a collaborative genome project dedicated to determining the genome sequence of the grapevine Vitis vinifera. It is a multinational project involving research centers in Australia, Canada, Chile, France, Germany, Italy, South Africa, Spain, and the United States.

<i>Vitis</i> Genus flowering plants in the grape family Vitaceae

Vitis (grapevine) is a genus of 81 accepted species of vining plants in the flowering plant family Vitaceae. The genus consists of species predominantly from the Northern Hemisphere. It is economically important as the source of grapes, both for direct consumption of the fruit and for fermentation to produce wine. The study and cultivation of grapevines is called viticulture.

<span class="mw-page-title-main">Phenolic content in wine</span> Wine chemistry

Phenolic compounds—natural phenol and polyphenols—occur naturally in wine. These include a large group of several hundred chemical compounds that affect the taste, color and mouthfeel of wine. These compounds include phenolic acids, stilbenoids, flavonols, dihydroflavonols, anthocyanins, flavanol monomers (catechins) and flavanol polymers (proanthocyanidins). This large group of natural phenols can be broadly separated into two categories, flavonoids and non-flavonoids. Flavonoids include the anthocyanins and tannins which contribute to the color and mouthfeel of the wine. The non-flavonoids include the stilbenoids such as resveratrol and phenolic acids such as benzoic, caffeic and cinnamic acids.

This glossary of viticultural terms list some of terms and definitions involved in growing grapes for use in winemaking.

<span class="mw-page-title-main">Petunidin</span> Chemical compound

Petunidin (Pt), like Europinidin and Malvidin, is derived from Delphinidin and is an O-methylated anthocyanidin of the 3-hydroxy type. It is a natural organic compound, a dark-red or purple water-soluble pigment found in many red berries including chokeberries, Saskatoon berries or different species of grape, and also part of the pigments responsible for the petal colors in many flowers. This pigment gives the Indigo Rose tomatoes the majority of their deep purple color when the fruits are exposed to sunlight. The name of the molecule itself is derived from the word Petunia.

<span class="mw-page-title-main">Wine color</span> Wine characteristic

The color of wine is one of the most easily recognizable characteristics of wines. Color is also an element in wine tasting since heavy wines generally have a deeper color. The accessory traditionally used to judge the wine color was the tastevin, a shallow cup allowing one to see the color of the liquid in the dim light of a cellar. The color is an element in the classification of wines.

<span class="mw-page-title-main">Caftaric acid</span> Chemical compound

Caftaric acid is a non-flavonoid phenolic compound.

<span class="mw-page-title-main">Wine chemistry</span> Chemistry of wine

Wine is a complex mixture of chemical compounds in a hydro-alcoholic solution with a pH around 4. The chemistry of wine and its resultant quality depend on achieving a balance between three aspects of the berries used to make the wine: their sugar content, acidity and the presence of secondary compounds. Vines store sugar in grapes through photosynthesis, and acids break down as grapes ripen. Secondary compounds are also stored in the course of the season. Anthocyanins give grapes a red color and protection against ultraviolet light. Tannins add bitterness and astringency which acts to defend vines against pests and grazing animals.

Delphinidin-3-<i>O</i>-(6-<i>p</i>-coumaroyl)glucoside Chemical compound

Delphinidin 3-O-(6-p-coumaroyl)glucoside is a p-coumaroylated anthocyanin. It can be found in some red Vitis vinifera grape cultivars and in red wine.

<i>p</i>-Coumaroylated anthocyanin

p-Coumaroylated anthocyanins are a type of anthocyanins with a p-coumaric acid unit linked with a sugar to an anthocyanidin aglycone. 3-(6-p-Coumaroyl)glucosides are found in grape and wine. Cyanidin-3-O-(di-p-coumarylglucoside)-5-glucoside is found in dark opal basil. Red leaves of Perilla frutescens also accumulate cyanidin 3-(6-O-p-coumaroyl-β-D-glucoside)-5-(6-O-malonyl-β-D-glucoside).

Anthocyanin 5-O-glucosyltransferase is an enzyme that forms anthocyanin 3,5-O-diglucoside from anthocyanin 3-O-glucoside.

Cascade is a red complex hybrid grape variety that was created by French viticulturist Albert Seibel in the early 20th century in Aubenas, Ardèche, in the Rhône Valley. It has been commercially available in North America since 1938 and has since been planted in Canada and the United States. However, in warmer climates, the grape is highly susceptible to a number of grapevine viruses, which has discouraged plantings of the variety.

<span class="mw-page-title-main">Callistephin</span> Chemical compound

Callistephin is an anthocyanin. It is the 3-O-glucoside of pelargonidin.

<span class="mw-page-title-main">Grape cultivation in California</span>

The 2020 table grape harvest was worth $2.12 billion while wine grapes brought in $1.7 billion, down 15.3% year-on-year. By weight this was 17% lower versus 2018. The next year, 2021 saw a much better yield. From 829,000 acres (335,000 ha) viniculturists got 6.94 short tons per acre (15.6 t/ha) for a total harvest of 5,755,000 short tons (5,221,000 t). At an average of $909 per short ton ($1,002/t) they were paid $5,229,902,000 for the season. Of that, 4,844,600 short tons (4,394,900 t) were for destined for processing industries and at $835 per short ton ($920/t) that was worth $4,046,382,000. The fresh harvest was 910,400 short tons (825,900 t) and selling at a price of $1,300 per short ton ($1,433/t), this sector was worth $1,183,520,000 for the season.

References

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  3. ↑ Wine and Spirits: Understanding Wine Quality (Second Revised ed.). London: Wine & Spirits Education Trust. 2012. pp. 2–5. ISBN   978-1-905819-15-7.
  4. ↑ Hotz, Robert Lee (11 January 2011). "Perhaps a Red, 4,100 B.C." Wall Street Journal. Retrieved 21 August 2016.
  5. ↑ "6,000-year-old winery found in Armenian cave (Wired UK)". Archived from the original on 8 December 2015. Retrieved 1 November 2015.
  6. 1 2 James Owen (12 January 2011). "Earliest Known Winery Found in Armenian Cave". National Geographic News. Archived from the original on 12 January 2011. Retrieved 2 April 2019.
  7. ↑ "Areni-1 Cave, Armenia: A Chalcolithic–Early Bronze Age settlement and ritual site in the southern Caucasus". Research Gate. 1 March 2012. Retrieved 10 April 2017.
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  11. 1 2 Netzer, Yishai; Netzer, Nissan (2021). "Hebrew Vine and Wine Terms from Ancient Times to the Present". Judea and Samaria Research Studies. 30 (1): 127–145. doi:10.26351/JSRS/30-1/5. ISSN   2617-8737. S2CID   241465067.
  12. ↑ Deuteronomy 8:8
  13. ↑ Isaiah 5:7, Hosea 9:10
  14. ↑ Walsh, Carey Ellen (1 January 2000), "The Cultivation of Grape Vines", The Fruit of the Vine, Brill, pp. 87–126, doi:10.1163/9789004369825_005, ISBN   978-90-04-36982-5 , retrieved 22 July 2024
  15. ↑ Haynes, Sybille (2005). Etruscan Civilization: A Cultural History. Getty Publications. ISBN   9780892366002.
  16. ↑ Steane, John (2014). The Archaeology of Medieval England and Wales. Vol. 47. Routledge. ISBN   9781317599944.
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