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Florigen
Florigen (or flowering hormone) is the hypothesized hormone-like molecule responsible for controlling and/or triggering flowering in plants. Florigen is produced in the leaves, and acts in the shoot apical meristem of buds and growing tips. It is known to be graft-transmissible, and even functions between species. However, despite having been sought since the 1930s, the exact nature of florigen is still disputed. Mechanism Essentially, to understand florigen, you must first understand how flowering works. For a plant to begin flowering, it must make its changes to the shoot apical meristem (SAM). However, there are factors the plant must first consider before it begins this process such as the environment but even more specifically, light. It is through "the evolution of both internal and external control systems that enables plants to precisely regulate flowering so that it occurs at the optimal time for reproductive success." The way the plant determines this optimal time is th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flowering
A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants (plants of the division Angiospermae). The biological function of a flower is to facilitate reproduction, usually by providing a mechanism for the union of sperm with eggs. Flowers may facilitate outcrossing (fusion of sperm and eggs from different individuals in a population) resulting from cross-pollination or allow selfing (fusion of sperm and egg from the same flower) when self-pollination occurs. There are two types of pollination: self-pollination and cross-pollination. Self-pollination occurs when the pollen from the anther is deposited on the stigma of the same flower, or another flower on the same plant. Cross-pollination is when pollen is transferred from the anther of one flower to the stigma of another flower on a different individual of the same species. Self-pollination happens in flowers where the stamen and carpel mature at the same time, and are positioned ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mikhail Chailakhyan
Mikhail Khristoforovich Chailakhyan ( hy, Միքայել Քրիստափորի Չայլախյան, russian: Михаи́л Христофо́рович Чайлахя́н) (1902–1991) was an Armenian-Soviet scientist A scientist is a person who conducts Scientific method, scientific research to advance knowledge in an Branches of science, area of the natural sciences. In classical antiquity, there was no real ancient analog of a modern scientist. Instead, ... who is widely known for proposing the existence of a universal plant hormone that is involved in flowering. He named this hormone florigen in 1936. His studies included the mechanisms of flowering, tuberization and sex expression in plants. His pioneer work included the agricultural applications of phytohormones and synthetic analogs.Aksenova, P. 2002. Problems of growth and development in the studies by M.Kh. Chailakhyan. Russian journal of Plant Physiology 49(4) 434-437. References {{DEFAULTSORT:Chailakhyan, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hormone
A hormone (from the Greek participle , "setting in motion") is a class of signaling molecules in multicellular organisms that are sent to distant organs by complex biological processes to regulate physiology and behavior. Hormones are required for the correct development of animals, plants and fungi. Due to the broad definition of a hormone (as a signaling molecule that exerts its effects far from its site of production), numerous kinds of molecules can be classified as hormones. Among the substances that can be considered hormones, are eicosanoids (e.g. prostaglandins and thromboxanes), steroids (e.g. oestrogen and brassinosteroid), amino acid derivatives (e.g. epinephrine and auxin), protein or peptides (e.g. insulin and CLE peptides), and gases (e.g. ethylene and nitric oxide). Hormones are used to communicate between organs and tissues. In vertebrates, hormones are responsible for regulating a variety of physiological processes and behavioral activities such as diges ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anton Lang (biologist)
Anton Lang (January 18, 1913 – June 24, 1996) was a Russian Empire-born American biologist and a plant physiologist. He was born in Saint Petersburg, his father was Georg Lang, a famous Russian Empire scientist and founding father of modern therapeutic therapies. Georg Lang ttps://web.archive.org/web/20100212195309/http://www.prl.msu.edu/PRL%20History/LangAwardLecturers.pdf Michigan State:The Anton Lang Memorial Awards and seminar/ref> He graduated from the University of Berlin in 1939, majoring in botany. After that, he is working as scientific assistant of Georg Melchers at the Kaiser Wilhelm Institute in Berlin-Dahlem. The cooperation between Anton Lang and Georg Melchers proved extremely fruitful and continued at the Max Planck Institute in Tübingen until 1949, when Anton, his wife Lydia, and his mother emigrated to North America. He was the recipient of a Lady Davis fellowship in the genetics department of McGill University, then a visiting professor at Texas A&M Univ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grafting
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 success of this joining requires that the vascular tissues grow together and such joining is called inosculation. The technique is most commonly used in asexual propagation of commercially grown plants for the horticultural and agricultural trades. In most cases, one plant is selected for its roots and this is called the stock or rootstock. The other plant is selected for its stems, leaves, flowers, or fruits and is called the scion or cion. The scion contains the desired genes to be duplicated in future production by the stock/scion plant. In stem grafting, a common grafting method, a shoot of a selected, desired plant cultivar is grafted onto the stock of another type. In another common form called bud grafting, a dormant side bud is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
14-3-3 Protein 14-3-3 proteins are a family of conserved regulatory molecules that are expressed in all eukaryotic cells. 14-3-3 proteins have the ability to bind a multitude of functionally diverse signaling proteins, including kinases, phosphatases, and transmembrane receptors. More than 200 signaling proteins have been reported as 14-3-3 ligands. Elevated amounts of 14-3-3 proteins in cerebrospinal fluid may be a sign of Creutzfeldt–Jakob disease. Properties Seven genes encode seven distinct 14-3-3 proteins in most mammals (See ''Human genes'' below) and 13-15 genes in many higher plants, though typically in fungi they are present only in pairs. Protists have at least one. Eukaryotes can tolerate the loss of a single 14-3-3 gene if multiple genes are expressed, but deletion of all 14-3-3s (as experimentally determined in yeast) results in |
