ECOLOGY OF Spiroplasma citri

Calavan, E. C.; Bové, J.M.

doi:10.1016/b978-0-12-078405-9.50017-3

Cited by 48 publications

(44 citation statements)

References 95 publications

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“…It inhabits the phloem sap of infected plants to which it is transmitted by sap-sucking hemipteran insect in a circulative and propagative manner (31,32). S. citri can infect a wide range of plant species, including crop and wild plants, as it is transmitted by polyphagous leafhoppers (13). Spiroplasmas are available in pure culture, and their study has therefore benefited from the use of molecular genetics.…”

mentioning

confidence: 99%

Partial Chromosome Sequence of Spiroplasma citri Reveals Extensive Viral Invasion and Important Gene Decay

Carle

Saillard

Carrère

et al. 2010

Appl Environ Microbiol

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The assembly of 20,000 sequencing reads obtained from shotgun and chromosome-specific libraries of the Spiroplasma citri genome yielded 77 chromosomal contigs totaling 1,674 kbp (92%) of the 1,820-kbp chromosome. The largest chromosomal contigs were positioned on the physical and genetic maps constructed from pulsed-field gel electrophoresis and Southern blot hybridizations. Thirty-eight contigs were annotated, resulting in 1,908 predicted coding sequences (CDS) representing an overall coding density of only 74%. Cellular processes, cell metabolism, and structural-element CDS account for 29% of the coding capacity, CDS of external origin such as viruses and mobile elements account for 24% of the coding capacity, and CDS of unknown function account for 47% of the coding capacity. Among these, 21% of the CDS group into 63 paralog families. The organization of these paralogs into conserved blocks suggests that they represent potential mobile units. Phage-related sequences were particularly abundant and include plectrovirus SpV1 and SVGII3 and lambda-like SpV2 sequences. Sixty-nine copies of transposases belonging to four insertion sequence (IS) families (IS30, IS481, IS3, and ISNCY) were detected. Similarity analyses showed that 21% of chromosomal CDS were truncated compared to their bacterial orthologs. Transmembrane domains, including signal peptides, were predicted for 599 CDS, of which 58 were putative lipoproteins. S. citri has a Sec-dependent protein export pathway. Eighty-four CDS were assigned to transport, such as phosphoenolpyruvate phosphotransferase systems (PTS), the ATP binding cassette (ABC), and other transporters. Besides glycolytic and ATP synthesis pathways, it is noteworthy that S. citri possesses a nearly complete pathway for the biosynthesis of a terpenoid.

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mentioning

confidence: 99%

Partial Chromosome Sequence of Spiroplasma citri Reveals Extensive Viral Invasion and Important Gene Decay

Carle

Saillard

Carrère

et al. 2010

Appl Environ Microbiol

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“…Neoaliturus haematocepts) in the Mediterranean region (Calavan & Bové, 1989). The Spiroplasma multiplies in the vector but there is no evidence of transovarial passage.…”

Section: Stubborn Diseasementioning

confidence: 99%

Control of Virus Diseases of Citrus

Lee

2015

Advances in Virus Research

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“…S. citri is the causal agent of citrus stubbom disease, which affects all Citrus species, and of horseradish brittle root. In addition, 35 plant species in 12 families have been reported as natural hosts, and another 38 species in 19 families have been experimentally infected (12). In contrast, S. kunkelii, the causal agent of com stunt, has a narrow host range and only com (Zea mays) and teosinte (Z mays mexicana and Z. mays parviglumis) are known as naturalhosts (111).…”

Section: Plant Association and Symptomatologymentioning

confidence: 99%

“…Thus, the AY phytoplasmas are considered to have a 10w vector specificity. Also, S. citri is transmitted by several leathopper vectors (12). The X-disease agent which predominantly infects Prunus species is transmitted by at least 13 leathopper species (87).…”

Section: Insect Vector Relationshipsmentioning

confidence: 99%