Colonization of dodder, Cuscuta indecora, by 'Candidatus Liberibacter asiaticus' and 'Ca. L. americanus'

Phytopathology
John S HartungR H Brlansky

Abstract

Huanglongbing, or citrus greening, threatens the global citrus industry. The presumptive pathogens, 'Candidatus Liberibacter asiaticus' and 'Ca. L. americanus' can be transferred from citrus to more easily studied experimental hosts by using holoparasitic dodder plants. However, the interaction between 'Candidatus Liberibacter' spp. and the dodder has not been studied. We combined quantitative polymerase chain reaction with electron microscopy to show that only 65% of tendrils of Cuscuta indecora grown on 'Ca. Liberibacter' spp.-infected host plants had detectable levels of the pathogen. Among tendrils that were colonized by Liberibacter in at least one 2 cm segment, most were not colonized in all segments. Furthermore, the estimated population levels of the pathogen present in serial 2 cm segments of dodder tendrils varied widely and without any consistent pattern. Thus, there was generally not a concentration gradient of the pathogen from the source plant towards the recipient and populations of the pathogen were sometimes found in the distal segments of the dodder plant but not in the proximal or middle segments. Populations of the pathogens ranged from 2 x 10(2) to 3.0 x 10(8) cells per 2 cm segment. On a fresh weight basis...Continue Reading

References

Jul 1, 1994·International Journal of Systematic Bacteriology·S JagoueixM Garnier
Sep 17, 2005·International Journal of Systematic and Evolutionary Microbiology·Diva do Carmo TeixeiraJoseph Bové
Sep 30, 2006·Science·Justin B RunyonConsuelo M De Moraes
Jul 11, 2009·Molecular Plant-microbe Interactions : MPMI·Yongping DuanTim Gottwald

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Citations

Feb 28, 2013·Phytopathology·Nian Wang, Pankaj Trivedi
Nov 14, 2019·Molecular Plant Pathology·Maxuel O AndradeNian Wang
Jun 24, 2017·Annual Review of Phytopathology·Nian WangJoaquim Martins
Aug 25, 2020·Molecular Plant·Weijie HuangGitta Coaker

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