Epidemiological importance ofSolanum sisymbriifolium,S. nigrumandS. dulcamaraas alternative hosts forPhytophthora infestans

Flier, W.G.; Bosch, G.B.M. van den; Turkensteen, L. J.

doi:10.1046/j.1365-3059.2003.00922.x

Cited by 45 publications

(50 citation statements)

References 26 publications

(32 reference statements)

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“…Despite the broad occurrence of bittersweet in many European countries and its possible impact as a source of Phythophthora in cultivated potato (Platt 1999;Cooke et al 2002;Flier et al 2003;Dandurand et al 2006), our knowledge about this species is very limited. Only a few experiments have been done aimed at answering different research questions (Hare 1983;Wang et al 1994).…”

Section: Discussionmentioning

confidence: 99%

“…It is a well-known host for the potato quarantine pathogen Pseudomonas solanacearum (Smith) Smith, a causal agent of bacterial wilt or brown rot (Olsson 1976;Elphinstone et al 1996;Janse 1996), and may play an important role in potato late blight epidemiology (Flier et al 2003;Dandurand et al 2006). In some countries in North-West Europe where potato is cultivated, S. dulcamara was subjected to eradication programs from the natural vegetation, aimed at preventing the spread of P. solanacearum.…”

Section: Introductionmentioning

confidence: 99%

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Genetic structure of European accessions of Solanum dulcamara L. (Solanaceae)

et al. 2010

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Solanum dulcamara (bittersweet) is one of the few native species of Solanum present in Europe. It is a common weed that occupies a wide range of habitats and is often found in the direct vicinity of cultivated potatoes (Solanum tuberosum), where it could transmit diseases. A broad sampling of European S. dulcamara accessions was carried out to gain insight into the population structure and crossing preferences of this species. Three amplified fragment length polymorphism (AFLP Ò ) primer combinations generating 288 polymorphic fragments were used to analyze 79 bittersweet accessions (245 individuals). Dendrograms revealed a low level of genetic polymorphism in the bittersweet populations, caused partially by the out-crossing nature of this species.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Genetic structure of European accessions of Solanum dulcamara L. (Solanaceae)

et al. 2010

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“…The resulting bacterially treated and control plants (four replicates per cultivar per treatment) were planted in commercial potting soil (Potgrond 4; Hortimea, Elst, The Netherlands) and allowed to grow until they flowered (i.e., growth stage 6 [21]) in a greenhouse using a daily cycle consisting of 16 h of light (with supplemental illumination provided by Philips HPIT lamps; 80 to 90 W per m 2 ) at 20°C and 8 h of darkness at 16°C. Then plants were infected with P. infestans isolate IPO82001 (mating type A2), which was chosen because of its aggressive infection of potato plants (16). Leaves at positions 9, 10, and 11 (54) of each plant were treated with 10 l of a suspension containing 10 4 P. infestans IPO82001 spores per ml.…”

Section: Methodsmentioning

confidence: 99%

Endophytic Colonization of Potato ( Solanum tuberosum L.) by a Novel Competent Bacterial Endophyte, Pseudomonas putida Strain P9, and Its Effect on Associated Bacterial Communities

Andreote

Araújo

Azevedo

et al. 2009

Appl Environ Microbiol

105

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Pseudomonas putida strain P9 is a novel competent endophyte from potato. P9 causes cultivar-dependent suppression of Phytophthora infestans. Colonization of the rhizoplane and endosphere of potato plants by P9 and its rifampin-resistant derivative P9R was studied. The purposes of this work were to follow the fate of P9 inside growing potato plants and to establish its effect on associated microbial communities. The effects of P9 and P9R inoculation were studied in two separate experiments. The roots of transplants of three different cultivars of potato were dipped in suspensions of P9 or P9R cells, and the plants were planted in soil. The fate of both strains was followed by examining colony growth and by performing PCR-denaturing gradient gel electrophoresis (PCR-DGGE). Colonies of both strains were recovered from rhizoplane and endosphere samples of all three cultivars at two growth stages. A conspicuous band, representing P9 and P9R, was found in all Pseudomonas PCR-DGGE fingerprints for treated plants. The numbers of P9R CFU and the P9R-specific band intensities for the different replicate samples were positively correlated, as determined by linear regression analysis. The effects of plant growth stage, genotype, and the presence of P9R on associated microbial communities were examined by multivariate and unweighted-pair group method with arithmetic mean cluster analyses of PCR-DGGE fingerprints. The presence of strain P9R had an effect on bacterial groups identified as Pseudomonas azotoformans, Pseudomonas veronii, and Pseudomonas syringae. In conclusion, strain P9 is an avid colonizer of potato plants, competing with microbial populations indigenous to the potato phytosphere. Bacterization with a biocontrol agent has an important and previously unexplored effect on plant-associated communities.The colonization of plant tissue is of paramount importance for successful application of plant-growth-promoting bacteria. For instance, efficient root colonization was shown to be important for the control of Fusarium oxysporum in tomato by a phenazine-1-carboxamide-producing Pseudomonas chlororaphis strain (6). The migratory response of bacterial inoculants to compounds released by plant roots is often the first step required for establishment of the bacteria in the rhizosphere and rhizoplane (29,48,50). Following the initial colonization by introduced bacteria, these organisms may spread further to the aerial parts of the plant (35). The degree of root colonization by bacterial inoculants depends on, in addition to the mode of application (35), factors intrinsic to the organism used, like the presence of flagella (11) and/or the presence of particular outer membrane lipopolysaccharides (13). Such features may differ from strain to strain. Once attached to plant roots, the inoculant bacteria may evoke "protective" responses in the plants, enabling them to resist phytopathogen attack (4).Endophytic colonization, characterized by colonization of internal plant tissues concomitant with growth and systemic spread, can ...

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“…The causal pathogen from tomato was first described by Payen in France in 1847 (Payen, 1847) and has been found responsible for numerous epidemics since it was first described (Stevenson, 1997). P. infestans has a wider host range which includes L. esculentum, S. tuberosum, S. sarrachoides, S. triflorum, S. dulcamara, S. sisymbriifolium, Nicotiana benthamiana and plants of the genus Calibrachoa (Bectell et al, 2006;Dandurand et al, 2006;Flier et al, 2003;Lebecka, 2008). P. infestans can attack leaves, petioles, stems, fruits and seeds of tomato (Irzhansky and Cohen 2006).…”

Section: Introductionmentioning

confidence: 99%