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Phytoplasmas

Phytoplasma
Phyllody on Coneflower with aster yellows.jpg
Phyllody induced by phytoplasma infection on a coneflower (Echinacea purpurea).
Scientific classification
Domain: Bacteria
Phylum: Tenericutes
Class: Mollicutes
Order: Acholeplasmatales
Family: Acholeplasmataceae
Genus: "Candidatus Phytoplasma"
Species

"Ca. Phytoplasma allocasuarinae"
"Ca. Phytoplasma americanum"
"Ca. Phytoplasma asteris"
"Ca. Phytoplasma aurantifolia"
"Ca. Phytoplasma australiense"
"Ca. Phytoplasma balanitae"
"Ca. Phytoplasma brasiliense"
"Ca. Phytoplasma caricae"
"Ca. Phytoplasma castaneae"
"Ca. Phytoplasma cirsii"
"Ca. Phytoplasma cocosnigeriae"
"Ca. Phytoplasma cocostanzaniae"
"Ca. Phytoplasma convolvuli"
"Ca. Phytoplasma costaricanum"
"Ca. Phytoplasma cynodontis"
"Ca. Phytoplasma fragariae"
"Ca. Phytoplasma fraxini"
"Ca. Phytoplasma graminis"
"Ca. Phytoplasma hispanicum"
"Ca. Phytoplasma japonicum"
"Ca. Phytoplasma luffae"
"Ca. Phytoplasma lycopersici"
"Ca. Phytoplasma malasianum"
"Ca. Phytoplasma mali"
"Ca. Phytoplasma meliae"
"Ca. Phytoplasma omanense"
"Ca. Phytoplasma oryzae"
"Ca. Phytoplasma palmae"
"Ca. Phytoplasma palmicola"
"Ca. Phytoplasma phoenicium"
"Ca. Phytoplasma pini"
"Ca. Phytoplasma pruni"
"Ca. Phytoplasma prunorum"
"Ca. Phytoplasma pyri"
"Ca. Phytoplasma rhamni"
"Ca. Phytoplasma rubi"
"Ca. Phytoplasma solani"
"Ca. Phytoplasma spartii"
"Ca. Phytoplasma sudamericanum"
"Ca. Phytoplasma tamaricis"
"Ca. Phytoplasma trifolii"
"Ca. Phytoplasma ulmi"
"Ca. Phytoplasma vitis"
"Ca. Phytoplasma ziziphi"

(as of September 2016)


"Ca. Phytoplasma allocasuarinae"
"Ca. Phytoplasma americanum"
"Ca. Phytoplasma asteris"
"Ca. Phytoplasma aurantifolia"
"Ca. Phytoplasma australiense"
"Ca. Phytoplasma balanitae"
"Ca. Phytoplasma brasiliense"
"Ca. Phytoplasma caricae"
"Ca. Phytoplasma castaneae"
"Ca. Phytoplasma cirsii"
"Ca. Phytoplasma cocosnigeriae"
"Ca. Phytoplasma cocostanzaniae"
"Ca. Phytoplasma convolvuli"
"Ca. Phytoplasma costaricanum"
"Ca. Phytoplasma cynodontis"
"Ca. Phytoplasma fragariae"
"Ca. Phytoplasma fraxini"
"Ca. Phytoplasma graminis"
"Ca. Phytoplasma hispanicum"
"Ca. Phytoplasma japonicum"
"Ca. Phytoplasma luffae"
"Ca. Phytoplasma lycopersici"
"Ca. Phytoplasma malasianum"
"Ca. Phytoplasma mali"
"Ca. Phytoplasma meliae"
"Ca. Phytoplasma omanense"
"Ca. Phytoplasma oryzae"
"Ca. Phytoplasma palmae"
"Ca. Phytoplasma palmicola"
"Ca. Phytoplasma phoenicium"
"Ca. Phytoplasma pini"
"Ca. Phytoplasma pruni"
"Ca. Phytoplasma prunorum"
"Ca. Phytoplasma pyri"
"Ca. Phytoplasma rhamni"
"Ca. Phytoplasma rubi"
"Ca. Phytoplasma solani"
"Ca. Phytoplasma spartii"
"Ca. Phytoplasma sudamericanum"
"Ca. Phytoplasma tamaricis"
"Ca. Phytoplasma trifolii"
"Ca. Phytoplasma ulmi"
"Ca. Phytoplasma vitis"
"Ca. Phytoplasma ziziphi"

(as of September 2016)

Phytoplasmas are specialised bacteria that are obligate parasites of plant phloem tissue and transmitting insects (vectors). They were discovered by scientists in 1967 and were named mycoplasma-like organisms or MLOs. Since their discovery, phytoplasmas have resisted all attempts to be cultured in vitro in any cell free media, hence routine cultivation in artificial media is still to be established. Nevertheless, still under trial stage, phytoplasma growth in specific artificial media has recently been shown. They are characterised by their lack of a cell wall, a pleiomorphic or filamentous shape, normally with a diameter less than 1 μm, and their very small genomes.


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Wikipedia

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