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| Registros recuperados: 255 | |
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| De Lorgeril, Julien; Petton, Bruno; Lucasson, Aude; Perez, Valérie; Stenger, Pierre-louis; Degremont, Lionel; Montagnani, Caroline; Escoubas, Jean Michel; Haffner, Philippe; Allienne, Jean-françois; Leroy, Marc; Lagarde, Franck; Vidal Dupiol, Jeremie; Gueguen, Yannick; Mitta, Guillaume. |
| Background: As a major threat to the oyster industry, Pacific Oyster Mortality Syndrome (POMS) is a polymicrobial disease affecting the main oyster species farmed across the world. POMS affects oyster juveniles and became panzootic this last decade, but POMS resistance in some oyster genotypes has emerged. While we know some genetic loci associated with resistance, the underlying mechanisms remained uncharacterized. So, we developed a comparative transcriptomic approach using basal gene expression profiles between different oyster biparental families with contrasted phenotypes when confronted to POMS (resistant or susceptible). Results: We showed that POMS resistant oysters show differential expression of genes involved in stress responses, protein... |
| Tipo: Text |
Palavras-chave: Pacific oyster; Oyster disease; Resistance; OsHV-1; Antiviral molecular pathways; Invertebrate immunity. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00602/71369/69811.pdf |
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| Tetreau, Guillaume. |
| Toxins are a major virulence factor produced by many pathogenic bacteria. In vertebrates, the response of hosts to the bacteria is inseparable from the response to the toxins, allowing a comprehensive understanding of this tripartite host-pathogen-toxin interaction. However, in invertebrates, this interaction has been investigated by two complementary but historically distinct fields of research: toxinology and immunology. In this article, I highlight how such dichotomy between these two fields led to a biased, or even erroneous view of the ecology and evolution of the interaction between insects, toxins, and bacteria. I focus on the reason behind such a dichotomy, on how to bridge the fields together, and on confounding effects that could bias the outcome... |
| Tipo: Text |
Palavras-chave: Invertebrate immunity; Host-pathogens interaction; Toxins; Bacillus thuringiensis; Resistance. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00457/56834/78950.pdf |
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| Dubief, Bruno; Nunes, Flavia; Basuyaux, Olivier; Paillard, Christine. |
| Since 1997, populations of the European abalone Haliotis tuberculata suffer mass mortalities attributed to the bacterium Vibrio harveyi. These mortalities occur at the spawning season, when the abalone immune system is depressed, and when temperatures exceed 17 °C, leading to favorable conditions for V. harveyi proliferation. In order to identify mechanisms of disease resistance, experimental successive infections were carried out on two geographically distinct populations: one that has suffered recurrent mortalities (Saint-Malo) and one that has not been impacted by the disease (Molène). Furthermore, abalone surviving these two successive bacterial challenges and uninfected abalone were used for several post-infection analyses. The Saint-Malo population... |
| Tipo: Text |
Palavras-chave: Immunity; Hemocyte; Abalone; Disease; Extracellular products; Immune priming; Vibrio harveyi; Flow cytometry; Resistance; Phagocytosis; Bacterial growth; QPCR; Gill. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00357/46800/46667.pdf |
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| Strausbaugh, C.A.; Panella, Leonard W.. |
| Curly top caused by Beet curly top virus (BCTV) is a widespread disease problem vectored by the beet leafhopper in semiarid sugar beet production areas. Host resistance is the primary defense against this problem, but resistance in commercial cultivars is only low to intermediate. In order to identify novel sources of curly top resistance, twenty-four plant introduction (PI) lines were screened in a disease nursery in 2014. The lines were arranged in a randomized complete block design with three replications. A curly top epiphytotic was created by releasing approximately 6 viruliferous beet leafhoppers per plant at the four- to six-leaf growth stage on 23 Jun. Foliar symptoms were evaluated on 16 Jul using a scale of 0-9 (0 = healthy and 9 = dead) in a... |
| Tipo: Article |
Palavras-chave: Curly top; Resistance; Verticillium wilt. |
| Ano: 2015 |
URL: http://eprints.nwisrl.ars.usda.gov/1588/1/1546.pdf |
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| Strausbaugh, C.A.; Olsen L, Nora; Frazier J, Mary; Wambolt, C. |
| Preventing sucrose losses in storage is important to the economic viability of the sugar beet industry. In an effort to establish additional measures for reducing sucrose losses in storage, ten fungicide and/or biological treatments were evaluated on sugar beet roots in a commercial sugar beet storage building for their ability to limit fungal growth on roots harvested 2 Oct. Six of the treatments were applied as a direct spray to roots, but two treatments were applied as a cold fog and two others were applied as a thermal fog. The treated eight-beet root samples were arranged in a randomized complete block design with 6 replications on top of the commercial sugar beet pile inside a storage building. Roots were evaluated for fungal growth, root rot,... |
| Tipo: Article |
Palavras-chave: Resistance; Storage; Sugarbeet. |
| Ano: 2015 |
URL: http://eprints.nwisrl.ars.usda.gov/1603/1/1561.pdf |
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| Strausbaugh, C.A.; Panella, Leonard W.. |
| Rhizomania caused by the Beet necrotic yellow vein virus (BNYVV) is a worldwide problem that can lead to loss of tonnage and lower percent sucrose in the field. BNYVV can also reduce the storability of roots. To identify germplasm with resistance to these problems, 14 sugarbeet germplasm lines developed by the USDA-ARS Ft. Collins sugarbeet program were screened in a field experiment arranged in a randomized complete block design with 5 replications. During the growing season plants were evaluated for foliar rhizomania symptoms. At harvest on 29 September, roots were evaluated for rhizomania symptoms and then placed into an indoor commercial sugarbeet storage building in Paul, ID. Foliar symptoms ranged from 0% for one of the resistant checks to 99%... |
| Tipo: Article |
Palavras-chave: Resistance; Rhizomania; Root rots; Sugarbeet. |
| Ano: 2012 |
URL: http://eprints.nwisrl.ars.usda.gov/1466/1/1431.pdf |
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| Panella, Leonard W.; Strausbaugh, C.A.. |
| Fifty sugar beet (Beta vulgaris L.) germplasm lines produced by the USDA-ARS Ft. Collins sugar beet program and two commercial check cultivars [SV2012RR (susceptible) and HM PM90 (resistant)] were screened for resistance to Beet curly top virus (BCTV). The curly top evaluation was conducted at the USDA-ARS North Farm in Kimberly, ID, which had been in barley in 2014. The germplasm was planted (density of 142,560 seeds/A) on May 27. The plots were two rows 10 ft long with 22-in row spacing and arranged in a randomized complete block design with three replications. The fields were sprinkler irrigated, cultivated, and hand weeded as necessary. Plant populations were thinned on June 20 Plants were inoculated at the four- to six-leaf growth stage on June... |
| Tipo: Article |
Palavras-chave: Curly top; Resistance; Sugarbeet. |
| Ano: 2016 |
URL: http://eprints.nwisrl.ars.usda.gov/1617/1/1574.pdf |
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| Panella, Leonard W.; Strausbaugh, C.A.. |
| Fifty-seven sugar beet (Beta vulgaris L.) lines from the USDA-ARS Ft. Collins sugar beet program and four check cultivars were screened for resistance to Beet necrotic yellow vein virus (BNYVV), the causal agent of rhizomania, and storage rot. The rhizomania evaluation was conducted at the USDA-ARS North Farm in Kimberly, ID. Seed of the sugar beet germplasm lines was planted on April 21. One-row plots, 10 ft long with 22-in row spacing between rows were arranged in a randomized complete block design with 4 replications. The trial relied on natural infection for rhizomania and storage rot development. The plots were rated for foliar symptom (percentage of plants with yellow, stunted, upright leaves) development on July 8 and 20. At harvest, roots in... |
| Tipo: Article |
Palavras-chave: Resistance; Rhizomania; Storage; Sugarbeet. |
| Ano: 2016 |
URL: http://eprints.nwisrl.ars.usda.gov/1628/1/1585.pdf |
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| Strausbaugh, C.A.; Wambolt, C. |
| Rhizomania caused by Beet necrotic yellow vein virus (BNYVV) and storage losses are serious sugar beet production problems. To identify sugar beet cultivars with resistance to BNYVV and evaluate storability, 32 commercial cultivars were screened by growing them in a sugar beet field infested with BNYVV in Kimberly, ID during the 2015 growing season in a randomized complete block design with 6 replications. At harvest on 28-29 September 2015, roots were dug and evaluated for symptoms of rhizomania and also placed in an indoor commercial sugar beet storage building. After 136 days in storage, samples were evaluated for surface rot, weight loss, and sucrose loss. Surface root rot ranged from 8 to 81%, weight loss ranged from 8.0 to 21.0%, sucrose losses... |
| Tipo: Article |
Palavras-chave: Resistance; Rhizomania; Storage; Sugarbeet. |
| Ano: 2016 |
URL: http://eprints.nwisrl.ars.usda.gov/1627/1/1584.pdf |
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| Eujayl, Imad A.; Strausbaugh, C.A.; Chunsheng, Lu. |
| KDH13 is a sugar beet (Beta vulgaris L. ssp vulgaris) doubled haploid line (PI 663862) released as a genetic stock by USDA-ARS in cooperation with the Beet Sugar Development Foundation, Denver, CO. KDH13 is resistant to beet curly top (BCT) caused by Beet curly top virus which is transmitted by the beet leafhopper (Circulifer tenellus Baker). KDH13 was extracted from the BCT resistant C762-17 (PI 560130) parental line that segregates for BCT resistance and genetic male sterility. Intensive phenotypic screening was used for selecting plants from C762-17 that showed no symptoms under fully controlled infection conditions in the greenhouse. Seed from a single plant was used as a donor of floral buds for isolation of unfertilized ovaries to regenerate KDH13... |
| Tipo: Article |
Palavras-chave: Curly top; Genetics; Resistance; Sugarbeet. |
| Ano: 2016 |
URL: http://eprints.nwisrl.ars.usda.gov/1608/1/1566.pdf |
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| Strausbaugh, C.A.; Eujayl, Imad A.; Wambolt, C. |
| Rhizomania caused by Beet necrotic yellow vein virus (BNYVV) and storage losses are serious sugar beet production problems. To identify sugar beet cultivars with resistance to BNYVV and evaluate storability, 30 experimental cultivars were screened by growing them in a sugar beet field infested with BNYVV in Kimberly, ID during the 2014 growing season in a randomized complete block design with 6 replications. At harvest on 24-25 September 2014, roots were dug and evaluated for symptoms of rhizomania and also placed in an indoor commercial sugar beet storage building. After 138 days in storage, samples were evaluated for surface rot, weight loss, and sucrose loss. Surface root rot ranged from 6 to 82%, weight loss ranged from 9.1 to 17.5%, sucrose losses... |
| Tipo: Article |
Palavras-chave: Resistance; Rhizomania; Sugarbeet. |
| Ano: 2015 |
URL: http://eprints.nwisrl.ars.usda.gov/1601/1/1559.pdf |
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| Strausbaugh, C.A.; Gillen, A.M.. |
| Twenty-five experimental sugarbeet hybrids submitted to the official variety trials were evaluated for resistance to Beet curly top virus (BCTV). Hybrids were planted in a commercial sprinkler-irrigated sugarbeet field and exposed to a natural epiphytotic of BCTV. Experimental units were arranged in a randomized complete block design with seven replications. Plots were evaluated for BCTV based on a Disease Index (DI) scale of 0 to 9 (no symptoms to dead) on Sept 14, 2004 by three raters. The moderately severe epiphytotic resulted in uniform disease pressure and significant differences between hybrids for DI, root yield, sugar content, and estimated recoverable sugar. Our disease ratings were positively correlated with (r = 0.632, P < 0.0001)... |
| Tipo: Article |
Palavras-chave: Resistance; Curly top. |
| Ano: 2006 |
URL: http://eprints.nwisrl.ars.usda.gov/1221/1/1193.pdf |
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| Strausbaugh, C.A.; Gillen, A.M.. |
| Commercial sugar beet hybrids were evaluated for resistance to Beet severe curly top virus in a furrow-irrigated sugar beet field near Ontario, OR where curly top had been a problem in previous years. The field trial relied on natural infection and was planted on 6 Apr. Plots were planted to a density of 285,120 seeds/A, and thinned to 40,731 plants/A. Plots were four rows wide (22 in. between rows) and 23 ft long. The experimental design was a randomized complete block with eight replications. The crop was managed according to standard cultural practices. The weather during the growing season was normal except for above average temperatures in Mar and Aug and above average precipitation in Apr and May. Disease pressure was uniform and moderately... |
| Tipo: Article |
Palavras-chave: Resistance; Curly top. |
| Ano: 2006 |
URL: http://eprints.nwisrl.ars.usda.gov/1222/1/1194.pdf |
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| Strausbaugh, C.A.; Eujayl, I.A.. |
| Curly top caused by Beet curly top virus is a widespread disease problem vectored by the beet leafhopper in semiarid sugar beet production areas. Host resistance is the primary defense against this problem, but resistance in commercial cultivars is only low to intermediate. In order to identify novel sources of curly top resistance, 14 sugar beet lines were screened in a disease nursery in 2015. The lines were arranged in a randomized complete block design with six replications. A curly top epiphytotic was created by releasing six viruliferous beet leafhoppers per plant at the four-to six-leaf growth stage on 24 Jun. Foliar symptoms were evaluated on 13 and 20 Jul using a scale of 0-9 (0 = healthy and 9 = dead) in a continuous manner. Curly top... |
| Tipo: Article |
Palavras-chave: Curly top; Resistance; Sugarbeet. |
| Ano: 2016 |
URL: http://eprints.nwisrl.ars.usda.gov/1616/1/1573.pdf |
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| Registros recuperados: 255 | |
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