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Blackleg (potatoes)
Blackleg is a plant disease of potato caused by pectolytic bacteria that can result in stunting, wilting, chlorosis of leaves, necrosis of several tissues, a decline in crop yield, yield, and at times the death of the potato plant. The term "blackleg" originates from the typical blackening and decay of the lower plant stem, stem portion, or "leg", of the plant.De Boer S. H. 2004"Blackleg of potato" The Plant Health Instructor. DOI:10.1094/PHI-I-2004-0712-01 Blackleg in potatoes is most commonly caused by ''Pectobacterium atrosepticum'' (older synonym: ''Erwinia carotovora subsp. astroseptica''), a gram-negative, nonsporulating, facultative anaerobe that is also associated with soft rot of potatoes. While other bacterial species such as ''Pectobacterium carotovorum'' and ''Dickeya dadantii'' can exhibit symptoms similar to blackleg of potato, these pathogens exhibit broader host ranges, are present in different climates, and typically are more associated with soft rot diseases.Ali ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blackleg Of Potato Wilt In Field
Blackleg, blacklegs or black-legged may refer to: Disease * Blackleg (disease), in sheep and cattle * Blackleg (''Brassica'') in rapeseed and other mustard-and-cabbage-family plants, caused by fungus ''Leptosphaeria maculans'' * Blackleg (potatoes), caused by ''Pectobacterium carotovorum'' * Blackleg (geraniums), caused by a form of the quasi-fungus ''Pythium'' * Scurvy, vitamin deficiency in primates and some other animals Species * Black-leg, a common name for the polypore fungus ''Royoporus badius'' * Black-legged kittiwake, seagull species * Black-legged seriema, seriema bird species * Blackleg tortoiseshell, another name for the large tortoiseshell butterfly * Animals named as black-legged * Black-legged tick, Ixodes scapularis and Ixodes pacificus Other uses * Blacklegs (horse), a racehorse * Opelousa people, historical Native American tribe of Louisiana * Blackleg labour (or strikebreaking) * Card sharp * Operation Blackleg, dive operation on warship HMS ''C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black Leg Of Potato
Black is a color that results from the absence or complete Absorption (electromagnetic radiation), absorption of visible spectrum, visible light. It is an achromatic color, without Colorfulness#Chroma, chroma, like white and grey. It is often used symbolically or figurative language, figuratively to represent darkness.Eva Heller, ''Psychologie de la couleur – effets et symboliques'', pp. 105–26. Black and white have often been used to describe opposites such as good and evil, the Dark Ages (historiography), Dark Ages versus the Age of Enlightenment, and night versus day. Since the Middle Ages, black has been the symbolic color of solemnity and authority, and for this reason it is still commonly worn by judges and magistrates. Black was one of the first colors used by artists in Neolithic cave paintings. It was used in ancient Egypt and Greece as the color of the underworld. In the Roman Empire, it became the color of mourning, and over the centuries it was frequently asso ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enzyme
An enzyme () is a protein that acts as a biological catalyst by accelerating chemical reactions. The molecules upon which enzymes may act are called substrate (chemistry), substrates, and the enzyme converts the substrates into different molecules known as product (chemistry), products. Almost all metabolism, metabolic processes in the cell (biology), cell need enzyme catalysis in order to occur at rates fast enough to sustain life. Metabolic pathways depend upon enzymes to catalyze individual steps. The study of enzymes is called ''enzymology'' and the field of pseudoenzyme, pseudoenzyme analysis recognizes that during evolution, some enzymes have lost the ability to carry out biological catalysis, which is often reflected in their amino acid sequences and unusual 'pseudocatalytic' properties. Enzymes are known to catalyze more than 5,000 biochemical reaction types. Other biocatalysts include Ribozyme, catalytic RNA molecules, also called ribozymes. They are sometimes descr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rogueing
In agriculture, roguing is the act of identifying and removing plants with undesirable characteristics from agricultural fields. Rogues are removed from the fields to preserve the quality of the crop A crop is a plant that can be grown and harvested extensively for profit or subsistence. In other words, a crop is a plant or plant product that is grown for a specific purpose such as food, Fiber, fibre, or fuel. When plants of the same spe ... being grown. Plants being removed may be diseased, of an unwanted variety, or undesirable for other reasons. For example, to ensure that the crop retains its integrity in terms of certain physical attributes, such as color and shape, individual plants that exhibit differing traits may be removed. Roguing is particularly important when growing seed crops, to prevent plants with undesirable characteristics from propagating into subsequent generations.Agricultural Seed Production By Raymond A. T. George References Agricultural pests Agr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Annual Reviews (publisher)
Annual Reviews is an independent, non-profit academic publishing company based in San Mateo, California. As of 2021, it publishes 51 journals of review articles and ''Knowable Magazine'', covering the fields of List of life sciences, life, Biomedical sciences, biomedical, Outline of physical science, physical, and Social science, social sciences. Review articles are usually "peer-invited" solicited submissions, often planned one to two years in advance, which go through a peer-review process. The organizational structure has three levels: a volunteer board of directors, editorial committees of experts for each journal, and paid employees. Annual Reviews' stated Mission statement, mission is to synthesize and integrate knowledge "for the progress of science and the benefit of society". The first Annual Reviews journal, the ''Annual Review of Biochemistry'', was published in 1932 under the editorship of Stanford University chemist J. Murray Luck, who wanted to create a resource ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Annual Review Of Phytopathology
The ''Annual Review of Phytopathology'' is a peer-reviewed academic journal that publishes review articles about phytopathology, the study of diseases that affect plants. It was first published in 1963 as the result of a collaboration between the American Phytopathological Society and the nonprofit publisher Annual Reviews. As of 2024, ''Journal Citation Reports'' lists the journal's 2023 impact factor as 9.1, ranking it tenth of 265 journal titles in the category "Plant Sciences". As of 2023, it is being published as open access, under the Subscribe to Open model. Its current editors are John M. McDowell and Gwyn A. Beattie. History In the 1950s, the American Phytopathological Society had intended to publish its own journal to cover significant developments in the field of phytopathology, or plant diseases. However, the nonprofit publisher Annual Reviews offered to publish the journal for them, and they agreed due to their publishing experience. In 1961, the American Phyt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Delia Platura
''Delia platura'', the seedcorn maggot or the bean seed fly, is a fly species in the family Anthomyiidae. ''D. platura'' is an agricultural pest of peas and beans. It is a vector of bacteria that cause potato blackleg. No-till fields are generally less attractive to egg-laying females. See also *Agriculture in the United Kingdom Agriculture in the United Kingdom uses 70% of the country's land area, employs 1% of its workforce (462,000 people) and contributes 0.5% of its gross value added ( £13.7 billion). The UK currently produces about 54% of its domestic food consump ... References External links * * {{Taxonbar, from=Q13584748 Anthomyiidae Insects described in 1826 Agricultural pest insects Pulse crop diseases Diptera of Europe Taxa named by Johann Wilhelm Meigen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Delia
DeliaDella as a diminutive is a feminine given name either taken from an epithet of the Greek moon goddess Artemis, or else representing a short form of '' Adelia'', '' Bedelia'', '' Cordelia'' or '' Odelia''. Meanings and origins According to records for the 1901 Irish census, there were 6,260 persons named Delia living that year in all 32 counties of Ireland, with 256 more bearing the full forename ''Bedelia'' (plus 59 other persons with the variant spelling ''Bidelia'', and 361 ''Biddy'', 529 ''Bride'' and 153984 ''Bridget''). These related names originated as English renderings of the Irish name ''Brighid'' (or ''Bríd'') meaning "exalted one", which originally belonged to a pagan fertility goddess (later, to an important medieval saint). In most cases, however, the name Delia refers to the tiny Greek island of Delos (), the birthplace of Artemis and her twin brother Apollo, given because they were born on the island of Delos. The name was used by Roman poet Tibullus a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lenticel
A lenticel is a porous tissue consisting of cells with large intercellular spaces in the periderm of the secondarily thickened organs and the Bark (botany), bark of woody stems and roots of gymnosperms and dicotyledonous flowering plants. It functions as a pore, providing a pathway for the direct gas exchange, exchange of gases between the internal tissues and atmosphere through the bark, which is otherwise impermeable to gases. The name lenticel, pronounced with an , derives from its lenticular (lens (optics), lens-like) shape. The shape of lenticels is one of the characteristics used for tree identification. Evolution Before there was much evidence for the existence and functionality of lenticels, the fossil record has shown the first primary mechanism of aeration in early vascular plants to be the stomata. However, in woody plants, while the respiratory function of stomata is retained in the living epidermis of leaves and green stems, that function is lost where the epidermi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stolon
In biology, a stolon ( from Latin ''wikt:stolo, stolō'', genitive ''stolōnis'' – "branch"), also known as a runner, is a horizontal connection between parts of an organism. It may be part of the organism, or of its skeleton. Typically, animal stolons are exoskeletons (external skeletons). In botany In botany, stolons are plant stems which grow at the soil surface or just below ground that form adventitious roots at the Node (botany), nodes, and new plants from the buds. Stolons are often called runners. Rhizomes, in contrast, are root-like stems that may either grow horizontally at the soil surface or in other orientations underground. Thus, not all horizontal stems are called stolons. Plants with stolons are called stoloniferous. A stolon is a plant propagation strategy and the complex of individuals formed by a mother plant and all its Cloning, clones produced from stolons form a single genetic individual, a genet (biology), genet. Morphology Stolons may have long or shor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vascular Bundle
A vascular bundle is a part of the transport system in vascular plants. The transport itself happens in the stem, which exists in two forms: xylem and phloem. Both these tissues are present in a vascular bundle, which in addition will include supporting and protective tissues. There is also a tissue between xylem and phloem, which is the cambium. The xylem typically lies towards the axis ( adaxial) with phloem positioned away from the axis ( abaxial). In a stem or root this means that the xylem is closer to the centre of the stem or root while the phloem is closer to the exterior. In a leaf, the adaxial surface of the leaf will usually be the upper side, with the abaxial surface the lower side. The sugars synthesized by the plant with sun light are transported by the phloem, which is closer to the lower surface. Aphids and leaf hoppers feed off of these sugars by tapping into the phloem. This is why aphids and leaf hoppers are typically found on the underside of a l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wilting
Wilting is the loss of rigidity of non-woody parts of plants. This occurs when the turgor pressure in non- lignified plant cells falls towards zero, as a result of diminished water in the cells. Wilting also serves to reduce water loss, as it makes the leaves expose less surface area. The rate of loss of water from the plant is greater than the absorption of water in the plant. The process of wilting modifies the leaf angle distribution of the plant (or canopy) towards more erectophile conditions. Lower water availability may result from: * drought conditions, where the soil moisture drops below conditions most favorable for plant functioning; * the temperature falls to the point where the plant's vascular system cannot function; * high salinity, which causes water to diffuse from the plant cells and induce shrinkage; * saturated soil conditions, where roots are unable to obtain sufficient oxygen for cellular respiration, and so are unable to transport water into the plant; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
