Journal
3 BIOTECH
Volume 8, Issue -, Pages -Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s13205-018-1094-5
Keywords
Lethal yellowing-type syndromes; Haplaxius crudus; Phytoplasmas; PCR detection
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Funding
- Common Fund for Commodities (Stadhouderskade 1072 AB Amsterdam) [FIGOOF/22]
- CONACYT (Mexico) [CB 129717]
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The present study was carried out to determine if group 16SrIV phytoplasmas, causing lethal yellowing (LY) disease, are present in Haplaxius crudus Van Duzee (Hemiptera: Cixiidae) insects associated with palms in Yucatan, Mexico. Haplaxius crudus feral insects were captured from palm foliage at two locations (Chicxulub Puerto and CICY, Merida, where LY-type diseases are active) and evaluated individually for the presence of phytoplasma DNA by a group 16SrIV-specific nested PCR assay. The results showed positive detection in H. crudus insects in a proportion of 2.7% (of the total 2726 analyzed) during a 3-year period of study. The percentage of detection was different for each site, 5.9% positive of 799 insects from Merida and 1.7% of 1927 from Chicxulub Puerto. Positive detections were also obtained in extracts from 5.3 to 1.2% of males and females, respectively. Sequencing and in silico RFLP and phylogenetic analyses of PCR-amplified rDNA products indicated that H. crudus insects from Chicxulub Puerto harbored phytoplasma strains of subgroups 16SrIV-A or 16SrIV-D, whereas in insects from Merida the strains found were 16SrIV-A, 16SrIV-D or 16SrIV-E. The diversity of subgroup strains detected in H. crudus coincided with strains previously identified in palms showing LY-type disease syndromes in Yucatan thereby implicating H. crudus as a candidate vector of 16SrIV phytoplasmas in this region of Mexico.
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