Bidni
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The Bidni, which is also referred to as ''Bitni'', is an olive cultivar from the
Mediterranean The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on ...
island of
Malta Malta ( , , ), officially the Republic of Malta ( mt, Repubblika ta' Malta ), is an island country in the Mediterranean Sea. It consists of an archipelago, between Italy and Libya, and is often considered a part of Southern Europe. It lies ...
. The fruit is small in size, hearty with a "violet colour", and is renowned for its superior oil which is low in
acidity In computer science, ACID ( atomicity, consistency, isolation, durability) is a set of properties of database transactions intended to guarantee data validity despite errors, power failures, and other mishaps. In the context of databases, a ...
. The latter is generally attributed to the poor quality
alkaline In chemistry, an alkali (; from ar, القلوي, al-qaly, lit=ashes of the saltwort) is a basic, ionic salt of an alkali metal or an alkaline earth metal. An alkali can also be defined as a base that dissolves in water. A solution of a ...
soil found on the Maltese Islands. As an indigenous olive cultivar, the Bidni has developed a unique DNA profile, and is believed to be among the most ancient species on the island, triggering local authorities to declare some of these ancient trees as "national monuments", and as having an "Antiquarian Importance", a status which is enjoyed by only a handful of other species.


Etymology

According to the "Maltese-English Dictionary", the word "Bidni" is derived from "badan", which means "corpulent", "robust", "to grow stout". Bidni ("żebbuġ", olive), is a "large olive tree producing very small olives". Therefore, the tree is called Bidni because it is "corpulent". This contradicts several online sources that suggest that the word Bidni originated from the rural hamlet of Bidnija, or that the word means "hunchback" in the
Maltese language Maltese ( mt, Malti, links=no, also ''L-Ilsien Malti'' or '), is a Semitic language derived from late medieval Sicilian Arabic with Romance superstrata spoken by the Maltese people. It is the national language of Malta and the only offic ...
.


Characteristics

In a landmark publication entitled, "Cultivation and Diseases of Fruit Trees in the Maltese Islands", John Borg (1922), Professor of Natural History, Superintendent of Agriculture, and founder of the Government's Experimental Farm at Għammieri, described the Bitni as follows: Decades later, the Bitni's disease resistant qualities still baffle scientists. Described by the '' Olive Oil Times'' as a "peculiar local variety", the Bidni's high levels of
polyphenols Polyphenols () are a large family of naturally occurring organic compounds characterized by multiples of phenol units. They are abundant in plants and structurally diverse. Polyphenols include flavonoids, tannic acid, and ellagitannin, some of ...
, particularly
oleuropein Oleuropein is a glycosylated seco-iridoid, a type of phenolic bitter compound found in green olive skin, flesh, seeds, and leaves. The term oleuropein is derived from the botanical name of the olive tree, ''Olea europaea''. Because of its bitter ...
, which is a natural antibiotic produced by the tree to protect its fruit and leaves, may be behind this remarkable characteristic. The Bitni's oil has been described as "spicy" and "peppery", a characteristic which differentiates it from other oils. Once fully established, fruit is produced in abundance, up to 60 kilos per tree.


Protection

The antiquity of Malta's ancient Bidni olive trees has been confirmed through
carbon dating Radiocarbon dating (also referred to as carbon dating or carbon-14 dating) is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon. The method was de ...
. Although the exact dates have been contested, with some noting that the trees were established during the mid-late Medieval period, others have argued that some of these olive trees date back to the 1st century A.D. The Bidni olive trees which are located just below an area known as ''Ġebel Għawżara'' have been protected since 1933, and are also listed in
UNESCO The United Nations Educational, Scientific and Cultural Organization is a List of specialized agencies of the United Nations, specialized agency of the United Nations (UN) aimed at promoting world peace and security through international coope ...
's Database of National Cultural Heritage Laws. In 2011, after recognising their historical and landscape value, and in recognition of the fact that "only 20 trees remain from 40 at the beginning of the 20th century", local authorities declared this site as a Tree Protected Area, under the provisions of a regulation made in 2018. In 2021, two local entities were entrusted with the maintenance and protection of one of the olive groves located in Bidnija. These highly protected Bidni olive trees, with some measuring between five and eight metres in height, still bear fruit, and are often revered by visitors. Other Bidni olive trees in the vicinity can be found in the private grounds of Qannotta Castle in Wardija. Since the Government of Malta has recognised the olive tree as forming an integral part of the traditional landscape, heavy pruning, felling, and uprooting of olive trees, including that of the Bidni variety, is subject to a permit from the relevant authorities. Although the Bidni olive has no PDO status, there are a number of initiatives, which include studies on its genetic composition, to attain this certification. Apart from legally protecting its name, this status of authenticity is typically used by marketing professionals to gain a competitive advantage at both European and international markets.


Revival

In January 2006, the ''Project for the Revival of the Indigenous Maltese Olive'' (PRIMO), was launched. Apart from reviving indigenous cultivars, such as the Bidni, one of the aims of this project was to substantially increase production levels in a bid to obtain the much coveted PDO status. As a direct result of PRIMO, some 30,000 Bidni olive trees were grafted and planted, thereby setting the necessary groundwork for the creation of a niche industry. The methodology behind this process consisted of several steps. After olive pips were collected from the ancient Bidni olive grove of Bidnija, these were then sowed at the Government of Malta's Experimental Farm in Għammieri and left to germinate for use as rootstock. Once the rootstocks were viable, cuttings were then taken from the millennia-old Bidni olive trees and carefully
grafted Grafting or graftage is a horticultural technique whereby tissues of plants are joined so as to continue their growth together. The upper part of the combined plant is called the scion () while the lower part is called the rootstock. The succ ...
to the rootstocks. Efforts to plant more Bidni olive trees are ongoing.


Gastronomy

The Maltese use their
olive oil Olive oil is a liquid fat obtained from olives (the fruit of ''Olea europaea''; family Oleaceae), a traditional tree crop of the Mediterranean Basin, produced by pressing whole olives and extracting the oil. It is commonly used in cooking: ...
quite generously. In 2012, they ranked 8th in the world in per capita olive oil consumption. With olive oil processing equipment dating back to the
Roman Empire The Roman Empire ( la, Imperium Romanum ; grc-gre, Βασιλεία τῶν Ῥωμαίων, Basileía tôn Rhōmaíōn) was the post-Roman Republic, Republican period of ancient Rome. As a polity, it included large territorial holdings aro ...
, and possibly even before this period, the consumption of oil has since become an integral part of the Maltese diet. For instance, in 1804, French writer Louis de Boisgelin noted that, "a clove of garlic, or an onion, anchovies dipped in oil, and salted fish", was the "usual diet" of the Maltese. Nowadays, the use of oil in Maltese cuisine is still predominant. The popular Maltese snack " ħobż biż-żejt", which literally translates to "bread with oil", is testimony to this. Although the Bidni is mostly known for its superior oil, the small fruit can also be enjoyed as a table olive. One popular method is to crush Bidni olives in garlic-infused extra virgin olive oil, and then eat them with Maltese bread. Another method is to gently fry Bidni olives after preserving them in
brine Brine is a high-concentration solution of salt (NaCl) in water (H2O). In diverse contexts, ''brine'' may refer to the salt solutions ranging from about 3.5% (a typical concentration of seawater, on the lower end of that of solutions used for ...
, and then serve them with seasonal herbs such as
parsley Parsley, or garden parsley (''Petroselinum crispum'') is a species of flowering plant in the family Apiaceae that is native to the central and eastern Mediterranean region (Sardinia, Lebanon, Israel, Cyprus, Turkey, southern Italy, Greece, ...
or
mint MiNT is Now TOS (MiNT) is a free software alternative operating system kernel for the Atari ST system and its successors. It is a multi-tasking alternative to TOS and MagiC. Together with the free system components fVDI device drivers, XaAE ...
. The leaves of the Bidni tree have also been used to make tea which is believed to lower
high blood pressure Hypertension (HTN or HT), also known as high blood pressure (HBP), is a long-term medical condition in which the blood pressure in the arteries is persistently elevated. High blood pressure usually does not cause symptoms. Long-term high bl ...
. This ancient remedy is "still used in rural communities in Malta".


References

{{Olives Olive cultivars Flora of Malta