The Napoleon Oak in Lausanne is a single, living individual of ''
Quercus robur
''Quercus robur'', the pedunculate oak, is a species of flowering plant in the beech and oak family, Fagaceae. It is a large tree, native plant, native to most of Europe and western Asia, and is widely cultivated in other temperate regions. It ...
'' in
Lausanne
Lausanne ( , ; ; ) is the capital and largest List of towns in Switzerland, city of the Swiss French-speaking Cantons of Switzerland, canton of Vaud, in Switzerland. It is a hilly city situated on the shores of Lake Geneva, about halfway bet ...
,
Switzerland
Switzerland, officially the Swiss Confederation, is a landlocked country located in west-central Europe. It is bordered by Italy to the south, France to the west, Germany to the north, and Austria and Liechtenstein to the east. Switzerland ...
known to have been present during
Napoleon Bonaparte
Napoleon Bonaparte (born Napoleone di Buonaparte; 15 August 1769 – 5 May 1821), later known by his regnal name Napoleon I, was a French general and statesman who rose to prominence during the French Revolution and led Military career ...
's march to Italy in 1800.
It has recently been subjected to extensive
genomic
Genomics is an interdisciplinary field of molecular biology focusing on the structure, function, evolution, mapping, and editing of genomes. A genome is an organism's complete set of DNA, including all of its genes as well as its hierarchical, ...
research, one of the few examples of such in a very long-lived organism.
It was replanted in 1800 when it was 22 years old in the center of what was the Dorigny estate, traditionally in honor of Napoleon when he stopped there on his way to the
conquest of Italy.
It now stands as a living historical monument on the
Dorigny campus of the
University of Lausanne
The University of Lausanne (UNIL; ) in Lausanne, Switzerland, was founded in 1537 as a school of Protestant theology, before being made a university in 1890. The university is the second-oldest in Switzerland, and one of the oldest universities ...
. In 2012, the tree was dated as 234 years old by
dendrochronology
Dendrochronology (or tree-ring dating) is the scientific method of chronological dating, dating tree rings (also called growth rings) to the exact year they were formed in a tree. As well as dating them, this can give data for dendroclimatology, ...
.
The tree, called Chêne de Napoléon in French, is about high with the base of its trunk being about in circumference. Because of its age, it is supported with of cables.
In 2017, researchers performed
whole-genome sequencing
Whole genome sequencing (WGS), also known as full genome sequencing or just genome sequencing, is the process of determining the entirety of the DNA sequence of an organism's genome at a single time. This entails sequencing all of an organism's ...
on the tree, and they found that, despite being centuries old, the
apical meristem
In cell biology, the meristem is a structure composed of specialized tissue found in plants, consisting of stem cells, known as meristematic cells, which are undifferentiated cells capable of continuous cellular division. These meristematic ce ...
of the lower and upper branches have developed remarkably low levels of
single nucleotide variant
In genetics and bioinformatics, a single-nucleotide polymorphism (SNP ; plural SNPs ) is a germline substitution of a single nucleotide at a specific position in the genome. Although certain definitions require the substitution to be present in a ...
(SNV)
somatic mutation
A somatic mutation is a change in the DNA sequence of a somatic cell of a multicellular organism with dedicated reproductive cells; that is, any mutation that occurs in a cell other than a gamete, germ cell, or gametocyte. Unlike germline muta ...
s.
Most mutations present are likely due to
UV radiation
Ultraviolet radiation, also known as simply UV, is electromagnetic radiation of wavelengths of 10–400 nanometers, shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight and constitutes about 10% of t ...
.
Information on this individual's genome is being presented as the Napoleome.
See also
*
Napoleon Oak, another tree named after Napoleon located in Zabór, Poland.
References
{{reflist
Individual oak trees