Wednesday, 2 May 2012

botany

.

Botany, plant science(s), or plant biology (from Ancient Greek βοτάνη botane, "pasture, grass, or fodder" and that from βόσκειν boskein, "to feed or to graze"), a discipline of biology, is the science of plant life. Traditionally, the science included the study of fungi, algae, and viruses.  Botany covers a wide range of scientific disciplines including structure, growth, reproduction, metabolism, development, diseases, chemical properties, and evolutionary relationships among taxonomic groups. Botany began with early human efforts to identify edible, medicinal and poisonous plants, making it one of the oldest branches of science. Nowadays, botanists study about 400,000 species of living organisms. The beginnings of modern-style classification systems can be traced to the 1500s-1700 when several attempts were made to scientifically classify plants. In the 19th and 20th centuries, major new techniques were developed for studying plants, including microscopy, chromosome counting, and analysis of plant chemistry. In the last two decades of the 20th century, DNA was used to more accurately classify plants. Botanical research focuses on plant population groups, evolution, physiology, structure, and systematices. Subdisciples of botany include agronomy, forestry, horticulture, and paleobotany. Key scientists in the history of botany include Theophrastus, Ibn al-Baitar, Carl Linnaeus, Gregor Johann Mendel, and Norman Borlaug
The history of botany begins with ancient writings on, and classifications of, plants. Such writings are found in several early cultures. Examples of early botanical works have been found in Ancient Indian sacred texts, ancient Zoroastrian writings,[4] and ancient Chinese works. Theophrastus (c. 371–287 BC) has been frequently referred to as the ”father of botany”.[5] The Greco-Roman world produced a number of botanical works including Theophrastus's Historia Plantarum and Dioscorides' De Materia Medica from the first century.[6] Works from the medieval Muslim world included Ibn Wahshiyya's Nabatean Agriculture, Abū Ḥanīfa Dīnawarī's (828-896) the Book of Plants, and Ibn Bassal's The Classification of Soils. In the early 13th century, Abu al-Abbas al-Nabati, and Ibn al-Baitar (d. 1248) also wrote on botany