Plant Science


Publications
825

Detection, Distribution, and Genetic Variability of ‘Candidatus Liberibacter’ Species Associated with Zebra Complex Disease of Potato in North America

Citation
Wen et al. (2009). Plant Disease 93 (11)
Names
Liberibacter
Abstract
The specificity and sensitivity of polymerase chain reaction (PCR) primers developed for ‘Candidatus Liberibacter solanacearum’ and ‘Candidatus Liberibacter psyllaurous’ were evaluated in conventional and real-time PCR assays. All PCR primers were specific for ‘Ca. L. psyllaurous’ and ‘Ca. L. solanacearum’ insomuch as they did not detect other prokaryotic plant pathogens that affect potato except for the putative pathogens associated with psyllid-yellows and haywire. Conventional PCR assays wer

First Report of “Candidatus Liberibacter psyllaurous” Associated with Psyllid Yellows of Tomato in Colorado

Citation
McKenzie, Shatters (2009). Plant Disease 93 (10)
Names
Ca. Liberibacter psyllaurous
Abstract
Greenhouse tomato growers from Fort Lupton, CO contacted the USDA-ARS-USHRL in 2002 regarding plant symptoms resembling “psyllid yellows” associated with Bactericera cockerelli (Sulc) infestations that initially begin as retarded growth, erectness of new growth, chlorosis, and purpling of leaves followed by widespread chlorosis and production of many small, poor-quality fruit (1). Symptoms appeared ≈6 weeks after psyllids were observed and were generally restricted to the top half of the plant.

First Report of “Candidatus Liberibacter solanacearum” in Tomato Plants in México

Citation
Munyaneza et al. (2009). Plant Disease 93 (10)
Names
“Liberibacter solanacearum”
Abstract
Tomato (Solanum lycopersicum) plants exhibiting symptoms resembling those of permanent yellowing disease (known in Mexico as “permanente del tomate”) that is commonly associated with phytoplasmas (1) were observed in tomato fields in Sinaloa, México in March 2009. Plant symptoms also resembled those caused by “Candidatus Liberibacter solanacearum” infection (2). Affected plants showed an overall chlorosis, severe stunting, leaf cupping, purple discoloration of veins, excessive branching of axil

First Report of “Candidatus Liberibacter solanacearum” in Pepper Plants in México

Citation
Munyaneza et al. (2009). Plant Disease 93 (10)
Names
“Liberibacter solanacearum”
Abstract
Bell pepper (Capsicum annuum) plants exhibiting symptoms that resembled those of potato psyllid (Bactericera cockerelli Sulc) damage and “Candidatus Liberibacter solanacearum” infection (2) were observed in a pepper field in La Cruz de Elota, Sinaloa, México in March 2009, with an infection rate of 1.5%. Plants exhibited chlorotic or pale green apical growth and leaf cupping, sharp tapering of the leaf apex, shortened internodes, and an overall stunting (2). Total DNA was extracted from the top

First Report of ‘Candidatus Phytoplasma australiense’ in Potato

Citation
Liefting et al. (2009). Plant Disease 93 (9)
Names
Ca. Phytoplasma australiense
Abstract
In January of 2009, potato plants (Solanum tuberosum) from a commercial crop in the Waikato Region, New Zealand were observed to have symptoms of upward rolling and purpling of the leaves. The symptoms appeared similar to those of “zebra chip”, a disorder of potato recently found to be associated with ‘Candidatus Liberibacter solanacearum’ in New Zealand and the United States (4). Total DNA from the leaf midveins and tubers from one of the symptomatic plants was separately extracted with an Inv

Candidatus Phytoplasma brasiliense associado ao superbrotamento do hibisco (Hibiscus rosa-sinensis L.) no Estado de São Paulo

Citation
Silva et al. (2009). Summa Phytopathologica 35 (3)
Names
Ca. Phytoplasma brasiliense
Abstract
Plantas de hibisco com superbrotamento e definhamento seguido de morte têm sido observadas nos municípios de São Paulo, Campinas e Piracicaba. Como os sintomas são sugestivos daqueles induzidos por fitoplasmas, o presente trabalho buscou identificar o possível fitoplasma associado com a doença. Assim, 14 plantas sintomáticas de hibisco foram coletadas em Piracicaba (SP) e submetidas ao PCR duplo com os primers P1/Tint-R16F2n/R2 e ao exame em microscópio eletrônico de transmissão. A identificação