|
Johann Gottlieb Gleditsch
Johann Gottlieb Gleditsch (5 February 1714, in Leipzig – 5 October 1786, in Berlin) was a German physician and botanist known for pioneer investigations of plant sexuality and reproduction. Biography He studied medicine and other subjects at the University of Leipzig (1728–35), where one of his instructors was the naturalist Johann Ernst Hebenstreit (1703–1757). From 1742 he gave lectures in physiology, botany and materia medica at the University of Frankfurt, afterwards relocating to Berlin as a professor of botany at the Collegium Medico-chirurgicum and director of the local botanical garden. Beginning in 1770, he gave lectures at the recently established institute of forestry, where he was instrumental in providing a scientific basis for the field of forestry. In his experiments involving plant movement, he demonstrated the influence that climatic factors had upon plant organs. Also, his view on the role that insects play in pollination of plants was considered t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johann Gottlieb Gleditsch
Johann Gottlieb Gleditsch (5 February 1714, in Leipzig – 5 October 1786, in Berlin) was a German physician and botanist known for pioneer investigations of plant sexuality and reproduction. Biography He studied medicine and other subjects at the University of Leipzig (1728–35), where one of his instructors was the naturalist Johann Ernst Hebenstreit (1703–1757). From 1742 he gave lectures in physiology, botany and materia medica at the University of Frankfurt, afterwards relocating to Berlin as a professor of botany at the Collegium Medico-chirurgicum and director of the local botanical garden. Beginning in 1770, he gave lectures at the recently established institute of forestry, where he was instrumental in providing a scientific basis for the field of forestry. In his experiments involving plant movement, he demonstrated the influence that climatic factors had upon plant organs. Also, his view on the role that insects play in pollination of plants was considered t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plant Movements
Plant physiology is a subdiscipline of botany concerned with the functioning, or physiology, of plants. Closely related fields include plant morphology (structure of plants), plant ecology (interactions with the environment), phytochemistry (biochemistry of plants), cell biology, genetics, biophysics and molecular biology. Fundamental processes such as photosynthesis, respiration, plant nutrition, plant hormone functions, tropisms, nastic movements, photoperiodism, photomorphogenesis, circadian rhythms, environmental stress physiology, seed germination, dormancy and stomata function and transpiration, both parts of plant water relations, are studied by plant physiologists. Aims The field of plant physiology includes the study of all the internal activities of plants—those chemical and physical processes associated with life as they occur in plants. This includes study at many levels of scale of size and time. At the smallest scale are molecular interactions of photosynthesis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
18th-century German Botanists
The 18th century lasted from January 1, 1701 ( MDCCI) to December 31, 1800 ( MDCCC). During the 18th century, elements of Enlightenment thinking culminated in the American, French, and Haitian Revolutions. During the century, slave trading and human trafficking expanded across the shores of the Atlantic, while declining in Russia, China, and Korea. Revolutions began to challenge the legitimacy of monarchical and aristocratic power structures, including the structures and beliefs that supported slavery. The Industrial Revolution began during mid-century, leading to radical changes in human society and the environment. Western historians have occasionally defined the 18th century otherwise for the purposes of their work. For example, the "short" 18th century may be defined as 1715–1789, denoting the period of time between the death of Louis XIV of France and the start of the French Revolution, with an emphasis on directly interconnected events. To historians who expand t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scientists From Leipzig
A scientist is a person who conducts scientific research to advance knowledge in an area of the natural sciences. In classical antiquity, there was no real ancient analog of a modern scientist. Instead, philosophers engaged in the philosophical study of nature called natural philosophy, a precursor of natural science. Though Thales (circa 624-545 BC) was arguably the first scientist for describing how cosmic events may be seen as natural, not necessarily caused by gods,Frank N. Magill''The Ancient World: Dictionary of World Biography'', Volume 1 Routledge, 2003 it was not until the 19th century that the term ''scientist'' came into regular use after it was coined by the theologian, philosopher, and historian of science William Whewell in 1833. In modern times, many scientists have advanced degrees in an area of science and pursue careers in various sectors of the economy such as academia, industry, government, and nonprofit environments.'''' History The roles ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1786 Deaths
Events January–March * January 3 – The third Treaty of Hopewell is signed, between the United States and the Choctaw. * January 6 – The outward bound East Indiaman '' Halsewell'' is wrecked on the south coast of England in a storm, with only 74 of more than 240 on board surviving. * February 2 – In a speech before The Asiatic Society in Calcutta, Sir William Jones notes the formal resemblances between Latin, Greek, and Sanskrit, laying the foundation for comparative linguistics and Indo-European studies. * March 1 – The Ohio Company of Associates is organized by five businessmen at a meeting at the Bunch-of-Grapes Tavern in Boston, to purchase land from the United States government to form settlements in what is now the U.S. state of Ohio. * March 13 – Construction begins in Dublin on the Four Courts Building, with the first stone laid down by the United Kingdom's Viceroy for Ireland, the Duke of Rutland. April–June * April 2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1714 Births
Events January–March * January 21 – After being tricked into deserting a battle against India's Mughal Empire by the rebel Sayyid brothers, Prince Azz-ud-din Mirza is blinded on orders of the Emperor Farrukhsiyar as punishment. * February 7 – The Siege of Tönning (a fortress of the Swedish Empire and now located in Germany in the state of Schleswig-Holstein) ends after almost a year, as Danish forces force the surrender of the remaining 1,600 defenders. The fortress is then leveled by the Danes. * February 28 – (February 17 old style) Russia's Tsar Peter the Great issues a decree requiring compulsory education in mathematics for children of government officials and nobility, applying to children between the ages of 10 and 15 years old. * March 2 – (February 19 old style) The Battle of Storkyro is fought between troops of the Swedish Empire and the Russian Empire, near what is now the village of Napue in Finland. The outnumbered Swedish forces, under the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linnean System
Linnaean taxonomy can mean either of two related concepts: # The particular form of biological classification (taxonomy) set up by Carl Linnaeus, as set forth in his '' Systema Naturae'' (1735) and subsequent works. In the taxonomy of Linnaeus there are three kingdoms, divided into ''classes'', and they, in turn, into lower ranks in a hierarchical order. # A term for rank-based classification of organisms, in general. That is, taxonomy in the traditional sense of the word: rank-based scientific classification. This term is especially used as opposed to cladistic systematics, which groups organisms into clades. It is attributed to Linnaeus, although he neither invented the concept of ranked classification (it goes back to Plato and Aristotle) nor gave it its present form. In fact, it does not have an exact present form, as "Linnaean taxonomy" as such does not really exist: it is a collective (abstracting) term for what actually are several separate fields, which use similar appro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fabaceae
The Fabaceae or Leguminosae,International Code of Nomenclature for algae, fungi, and plants. Article 18.5 states: "The following names, of long usage, are treated as validly published: ....Leguminosae (nom. alt.: Fabaceae; type: Faba Mill. Vicia L.; ... When the Papilionaceae are regarded as a family distinct from the remainder of the Leguminosae, the name Papilionaceae is conserved against Leguminosae." English pronunciations are as follows: , and . commonly known as the legume, pea, or bean family, are a large and agriculturally important of |
Gleditsia
''Gleditsia'' (honey locust) is a genus of trees in the family Fabaceae, subfamily Caesalpinioideae, native to North America and Asia. The Latin name commemorates Johann Gottlieb Gleditsch, director of the Berlin Botanical Garden, who died in 1786. Species There are 12 species: *'' Gleditsia amorphoides'' (Griseb.) Taubert *'' Gleditsia aquatica'' Marshall – water locust or swamp locust *'' Gleditsia assamica'' Bor *'' Gleditsia australis'' F. B. Forbes & Hemsley *''Gleditsia caspica'' Desf. – Caspian locust or Persian honeylocust *'' Gleditsia fera'' (Lour.) Merr. *''Gleditsia japonica'' Miq. – Japanese honey locust *'' Gleditsia medogensis'' Z.C.Ni *'' Gleditsia microphylla'' D.Gordon ex Y.T.Lee *'' Gleditsia rolfei'' S.Vidal *'' Gleditsia sinensis'' Lam. – Chinese honey locust *''Gleditsia triacanthos'' L. – thorny honey locust Hybrids * ''Gleditsia'' × ''texana'' Sarg. – Texas honey locust (=''G. aquatica'' × ''triacanthos)'' All the species are woody ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pollination
Pollination is the transfer of pollen from an anther of a plant to the stigma of a plant, later enabling fertilisation and the production of seeds, most often by an animal or by wind. Pollinating agents can be animals such as insects, birds, and bats; water; wind; and even plants themselves, when self-pollination occurs within a closed flower. Pollination often occurs within a species. When pollination occurs between species, it can produce hybrid offspring in nature and in plant breeding work. In angiosperms, after the pollen grain (gametophyte) has landed on the stigma, it germinates and develops a pollen tube which grows down the style until it reaches an ovary. Its two gametes travel down the tube to where the gametophyte(s) containing the female gametes are held within the carpel. After entering an ovum cell through the micropyle, one male nucleus fuses with the polar bodies to produce the endosperm tissues, while the other fuses with the ovule to produce the embr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
