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Candidatus Phytoplasma Sacchari
''Candidatus'' Phytoplasma sacchari is a species of phytoplasma pathogen associated with sugarcane grassy shoot disease (SCGS). This SCGS phytoplasma belongs to the Rice Yellow Dwarf Rice is the seed of the grass species ''Oryza sativa'' (Asian rice) or less commonly ''Oryza glaberrima'' (African rice). The name wild rice is usually used for species of the genera ''Zizania'' and '' Porteresia'', both wild and domesticated, ... (RYD) group. References Sugarcane diseases Candidatus taxa {{Mollicutes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phytoplasma
Phytoplasmas are obligate intracellular parasites of plant phloem tissue and of the insect vectors that are involved in their plant-to-plant transmission. Phytoplasmas were discovered in 1967 by Japanese scientists who termed them mycoplasma-like organisms. Since their discovery, phytoplasmas have resisted all attempts at ''in vitro'' culture in any cell-free medium; routine cultivation in an artificial medium thus remains a major challenge. Phytoplasmas are characterized by the lack of a cell wall, a pleiomorphic or filamentous shape, a diameter normally less than 1 μm, and a very small genome. Phytoplasmas are pathogens of agriculturally important plants, including coconut, sugarcane, and sandalwood, in which they cause a wide variety of symptoms ranging from mild yellowing to death. Phytoplasmas are most prevalent in tropical and subtropical regions. They are transmitted from plant to plant by vectors (normally sap-sucking insects such as leafhoppers) in which they both sur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sugarcane Grassy Shoot Disease
Sugarcane grassy shoot disease (SCGS), is associated with ‘ ''Candidatus'' Phytoplasma sacchari’ which are small, pleomorphic, pathogenic bacteria that contributes to yield losses from 5% up to 20% in sugarcane. These losses are higher in the ratoon crop. A higher incidence of SCGS has been recorded in some parts of Southeast Asia and India, resulting in 100% loss in cane yield and sugar production. SCGS disease symptoms Phytoplasma-infected sugarcane plants show a proliferation of tillers, which give it typical grassy appearance, hence the name grassy shoot disease. The leaves of infected plants do not produce chlorophyll, and therefore appear white or creamy yellow. The leaf veins turn white first as the phytoplasma resides in leaf phloem tissue. Symptoms at the early stage of the plant life cycle include leaf chlorosis, mainly at the central leaf whorl. Infected plants do not have the capacity to produce food in the absence of chlorophyll, which results in no cane forma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rice Yellow Dwarf
Rice is the seed of the grass species ''Oryza sativa'' (Asian rice) or less commonly ''Oryza glaberrima'' (African rice). The name wild rice is usually used for species of the genera ''Zizania'' and ''Porteresia'', both wild and domesticated, although the term may also be used for primitive or uncultivated varieties of ''Oryza''. As a cereal grain, domesticated rice is the most widely consumed staple food for over half of the world's human population,Abstract, "Rice feeds more than half the world's population." especially in Asia and Africa. It is the agricultural commodity with the third-highest worldwide production, after sugarcane and maize. Since sizable portions of sugarcane and maize crops are used for purposes other than human consumption, rice is the most important food crop with regard to human nutrition and caloric intake, providing more than one-fifth of the calories consumed worldwide by humans. There are many varieties of rice and culinary preferences tend to vary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sugarcane Diseases
This article is a list of diseases of sugarcane (''Saccharum'' spp. hybrids). Bacterial diseases Fungal diseases Miscellaneous diseases and disorders Nematodes, parasitic Viral diseases Protozoan diseases Phytoplasma diseases Phytoplasmas were previously known as 'mycoplasma-like organisms' (MLOs).Rao, G. P. and Ford, R. E. (2000) Vectors of virus and Phytoplasma diseases of Sugarcane: An Overview. In: Sugarcane Pathology, Vol. III. Virus and Phytoplasma diseases, G.P. Rao, R.E. Ford, M. Tosic and D.S. Teakle (Eds) Science Publishers, Hamshere, USA, Pg: 265-314. Unsure causal agent diseases * Ramu stunt disease The Ramu stunt disease is a disease of the sugarcane widespread throughout Papua New Guinea, but not detected in Australia. ''Eumetopina flavipes'', the island sugarcane planthopper, is a species of planthopper present throughout South East Asia ..., a disease widespread throughout Papua New Guinea, but not detected in Australia References ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
