Inoculação e sobrevivência de Xanthomonas vesicatoria em sementes de tomateiro

Corrêa, Fábio Mathias; Carvalho, Aldir de O. de; Carmo, Margarida Goréte Ferreira do

doi:10.1590/s0100-54052008000100015

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…glycinea, and also reported symptoms of this disease in plants derived from these seeds, when exposed to ideal conditions for infection. Thus, even if the pathogen cannot be visually detected in seeds, as occurred in this study, seeds can be effective in disseminating plant bacterial diseases (Parashar and Leben, 1972;Silva et al, 2002;Romeiro, 2005;Corrêa et al, 2008;Silva et al, 2013).…”

Section: Discussionmentioning

confidence: 71%

“…garcae and contribute to spreading the pathogen. Seeds in general provide optimal conditions for the survival and spread of plant bacteria, which may remain viable for variable periods (Schuster and Sayre, 1967;Silva et al, 2002;Romeiro, 2005;Corrêa et al, 2008). Moreover, seed-borne bacteria can be efficiently disseminated over long distances and introduced in areas free of disease or serve as a source of initial inoculum for epidemics in nurseries and fields (Neergaard, 1979;Romeiro, 2005).…”

Section: Discussionmentioning

confidence: 99%

“…In the case of plant pathogens, the inoculum can be transmitted by seeds to plants in both nursery and field. Even harbored in the outer seed integument, the inoculum of some bacterial species can cause infection in plants (Guthrie, 1970;Silva et al, 2002;Corrêa et al, 2008). Silva et al (2013) reported transmission and infection by Xanthomonas vesicatoria from seed integument to new shoots of tomato seedlings (Solanum lycopersicum L.).…”

Section: Introductionmentioning

confidence: 99%

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Occurrence of Pseudomonas syringae pv. garcae in coffee seeds

Belan¹,

Pozza²,

Freitas³

et al. 2016

Aust J Crop Sci

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Given the damage and losses caused by bacterial blight of coffee (Pseudomonas syringae pv. garcae) (PSG) in coffee (Coffea arabica) seedling nurseries and lack of knowledge of the origin of the initial inoculum, the goal of this study was to determine whether coffee seeds can contain viable inoculum and spread bacterial inoculum. Seeds from plants with symptoms of bacterial blight of coffee were immersed in sterilized saline solution, and the crude extract obtained was inoculated in leaves of coffee seedlings. Leaves of plants inoculated with seed extract from symptomatic plants had symptoms of bacterial blight similar to those on leaves inoculated with reference isolate PSG. Seedlings inoculated with seed extract from asymptomatic plants showed no symptoms. Symptomatic leaves were submitted to exudate tests, and the etiologic agent was isolated in culture medium. The isolates with colonies morphologically similar to reference isolate PSG were selected and tested for hypersensitive reaction (HR) and pathogenicity to coffee seedlings. The isolates positive for HR and pathogenic to coffee also showed biochemical and molecular patterns equal to those of reference isolate PSG by the rep-PCR technique using Box primer. Thus, coffee seeds from plants with symptoms of bacterial blight can contain viable inoculum of P. syringae pv. garcae.

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Section: Discussionmentioning

confidence: 71%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Occurrence of Pseudomonas syringae pv. garcae in coffee seeds

Belan¹,

Pozza²,

Freitas³

et al. 2016

Aust J Crop Sci

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Transporte de Xanthomonas vesicatoria de sementes para plântulas e mudas de tomate

et al. 2013

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Transport of Xanthomonas vesicatoria from seeds to seedlings and to plants of tomatoTransmission of Xanthomonas vesicatoria by seeds is one of the major sources of inoculum for development of epidemic bacterial spot. The aim in this work was elucidating the process of infection and colonization of tomato seeds and seedlings by these bacteria. Three experiments were carried out using X. vesicatoria, ENA 4463 isolate, and tomato seeds from Santa Clara Miss Brasil cultivar. Seeds were inoculated using vacuum or by injection of bacterial suspension in the region of the placenta of green fruits. Sowing was done in Gerbox boxes, aluminum or Styrofoam trays (128 cells) containing germitest paper, sand or commercial substrate for seedlings, respectively. Seedlings in Gerbox were assessed along six days by the quantification of bacterial population associated to different organs, through direct and indirect isolation on NA medium. In sand and commercial substrate, assessments were carried out until 30 days using the same procedures. Bacteria was easily isolated from the coat along the first six days, and from radicles, hypocotyls and cotyledon leaves just after the organs appearance, at two or three days after sowing, respectively. Maximum population of Xanthomonas vesicatoria was observed at 48 hours after sowing at the time of radicle protrusion. In sand and commercial substrate experiments, the bacteria colonized all plant organs and this process occurred as they arose. These bacteria can survive as resident at roots, epicotyls, cotyledon and definitive leaves until, at least, 30 days after sowing, not necessarily causing symptoms.

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Improved seed health tests for Xanthomonas axonopodis pv. phaseoli in common bean

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Inoculação e sobrevivência de Xanthomonas vesicatoria em sementes de tomateiro

Cited by 4 publications

References 3 publications

Occurrence of Pseudomonas syringae pv. garcae in coffee seeds

Occurrence of Pseudomonas syringae pv. garcae in coffee seeds

Transporte de Xanthomonas vesicatoria de sementes para plântulas e mudas de tomate

Improved seed health tests for Xanthomonas axonopodis pv. phaseoli in common bean

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