Plant Science


Publications
825

Two ‘Candidatus Liberibacter asiaticus’ Strains Recently Found in California Harbor Different Prophages

Citation
Zheng et al. (2017). Phytopathology® 107 (6)
Names
Ca. Liberibacter asiaticus
Abstract
‘Candidatus Liberibacter asiaticus’ (CLas), an α-proteobacterium, is associated with citrus Huanglongbing (HLB; yellow shoot disease). In California, two cases of CLas have been detected in Los Angeles County, one in Hacienda Heights in 2012 and the other in San Gabriel in 2015. Although all infected trees were destroyed in compliance with a state mandate, citrus industry stakeholder concerns about HLB in California are high. Little is known about the biology of CLas, particularly the Californi

Molecular identification of Candidatus Phytoplasma spp. associated with Sophora yellow stunt in Iran

Citation
Allahverdi et al. (2017). Journal of Plant Protection Research 57 (2)
Names
Ca. Phytoplasma Ca. Phytoplasma phoenicium Ca. Phytoplasma solani
Abstract
Abstract In the spring of 2012, sophora (Sophora alopecuroides L.) plants showing symptoms of leaf yellowing, little leaves and stunting were observed in Firooz-kuh (Tehran province), Sari (Mazandaran province) and Urmia (West Azerbaijan province) in Iran. Symptomatic plants from the three locations were subjected to nested polymerase chain reaction (PCR) to amplify 16SrRNA using primer pair P1/P7 followed by primer pair R16F2n/R16R2. The amplicons were purified, sequenced and the nucleotide seq

Physiologic, Anatomic, and Gene Expression Changes in Citrus sunki, Poncirus trifoliata, and Their Hybrids After ‘Candidatus Liberibacter asiaticus’ Infection

Citation
Boava et al. (2017). Phytopathology® 107 (5)
Names
Ca. Liberibacter asiaticus
Abstract
Huanglongbing (HLB) is a destructive disease of citrus caused by phloem-limited bacteria, namely ‘Candidatus Liberibacter asiaticus’ (Las), ‘Candidatus Liberibacter africanus’, and ‘Candidatus Liberibacter americanus’. Although there are no known HLB-resistant citrus species, studies have reported Poncirus trifoliata as being more tolerant. Assuming that callose deposition in the phloem of infected plants can inhibit translocation of photosynthetic products and cause starch accumulation, we com

Relative Abundance of Potato Psyllid Haplotypes in Southern Idaho Potato Fields During 2012 to 2015, and Incidence of ‘Candidatus Liberibacter solanacearum’ Causing Zebra Chip Disease

Citation
Dahan et al. (2017). Plant Disease 101 (5)
Names
“Liberibacter solanacearum”
Abstract
Zebra chip (ZC) disease, a serious threat to the potato industry, is caused by the bacterium ‘Candidatus Liberibacter solanacearum’ (Lso). Five haplotypes (hapA to hapE) of this pathogen have been described so far in different crops, with only hapA and hapB being associated with ZC in potato. Both haplotypes are vectored and transmitted to a variety of solanaceaeous plants by the tomato/potato psyllid, Bactericera cockerelli (Šulc). Psyllids are native to North America, and four haplotypes have

Seasonal Variation of ‘Candidatus Liberibacter asiaticus’ Titers in New Shoots of Citrus in Distinct Environments

Citation
Lopes et al. (2017). Plant Disease 101 (4)
Names
Ca. Liberibacter asiaticus
Abstract
The major citrus area of Brazil occupies near 450,000 ha between the Triângulo Mineiro (TM) region of Minas Gerais State and the south of São Paulo State (SPS). Significant climatic variation occurs between regions which could affect huanglongbing (HLB) progress, which is lower in TM. To investigate this possibility, young sweet orange shoots were sampled periodically over 2 years to determine ‘Candidatus Liberibacter asiaticus’ titers in naturally infected trees in orchards in Analândia, centr