High diversity, expanding populations and purifying selection in phytoplasmas causing coconut lethal yellowing in Mozambique

Sammanfattning

In this study, the putative phytoplasma species causing coconut lethal yellowing disease in Mozambique and Tanzania were characterized. The 16S rRNA and secA genes were sequenced. Phylogenetic analysis revealed that Mozambican coconut phytoplasmas belong to three different types: Candidatus Phytoplasma palmicola' 16SrXXII-A, a second strain that was previously isolated in Tanzania and Kenya (16SrIV-C), and a third strain that was different from all known lethal yellowing phytoplasma species. The third strain potentially represents a novel species and is closely related to pine phytoplasma. Co-infection with Ca. Phytoplasma pini'-related and Ca. Phytoplasma palmicola' 16SrXXII-A strains was observed. Furthermore, sequence variation in Ca. Phytoplasma palmicola' at the population level was consistent with purifying selection and population expansion.

Nyckelord

"Candidatus Phytoplasma palmicola'; coconut lethal yellowing phytoplasma; coconut palm (Cocos nucifera); Mozambique; phylogeny; population biology

Publicerad i

Plant Pathology
2015, volym: 64, nummer: 3, sidor: 597-604
Utgivare: WILEY-BLACKWELL

SLU författare

• Bila, Joao

  • Institutionen för skoglig mykologi och växtpatologi, Sveriges lantbruksuniversitet
    
  • Universidade Eduardo Mondlane (UEM)

• Samils, Berit

  • Institutionen för skoglig mykologi och växtpatologi, Sveriges lantbruksuniversitet
    

• Högberg, Nils

  • Institutionen för skoglig mykologi och växtpatologi, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Mikrobiologi
Övriga andra lantbruksrelaterade vetenskaper

Publikationens identifierare

• DOI: https://doi.org/10.1111/ppa.12306

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/72421