Interactions of<i>Verticillium dahliae, Colletotrichum coccodes, Rhizoctonia solani,</i>and<i>Pratylenchus penetrans</i>in the Early Dying Syndrome of Russet Burbank Potatoes

Kotcon, James B.; Rouse, D. I.; Mitchell, John E.

doi:10.1094/phyto-75-68

Cited by 48 publications

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“…Usually, the performance of roots is not estimated when the interaction effect of fungal pathogens and plant-parasitic nematodes are investigated on potato (Back et al 2006Bhattarai et al 2009;Bhattarai et al 2010;Kotcon et al 1985). In the present study, the dry weights of roots were negatively affected by the presence of nematodes in cv.…”

Section: Discussionmentioning

confidence: 50%

“…The plant-parasitic nematodes in the full nematode community were mostly P. crenatus but also P. neglectus occurred. Pratylenchus penetrans is a more aggressive root-lesion nematode (Castillo and Vovlas 2007) and it is in experiments with that particular species a synergistic interaction with R. solani previously has been found (Kotcon et al 1985;Viketoft et al, unpublished data). But as P. penetrans usually are more harmful, it is contradictory that there is a stronger effect of nematodes on tuber yields in the present study.…”

Section: Discussionmentioning

confidence: 87%

“…Rhizoctonia solani is often reported to be involved in disease complexes with nematodes. In potato, the interactions between R. solani and the potato cyst nematodes Globodera rostochiensis (Back et al 2006 and Globodera pallida (Bhattarai et al 2009(Bhattarai et al , 2010 have been quite well studied, and the interaction between the root-lesion nematode Pratylenchus penetrans and R. solani result in lower tuber yield (Kotcon et al 1985;Viketoft et al, unpublished data).…”

Section: Introductionmentioning

confidence: 99%

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Cultivar Effects on the Interaction between Free-Living Plant-Parasitic Nematodes and the Fungal Pathogen Rhizoctonia solani in Potato

2017

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Crop damage is associated with infection by plant pathogens but can also arise through abiotic factors. However, the plant pathogens are involved in biotic interactions with other plant pathogens, and these interactions may differ depending of the cultivar of the crop. Here, the interaction between the fungus Rhizoctonia solani (AG3) and free-living plant-parasitic nematodes was investigated in a pot experiment with different potato cultivars. No synergistic interaction between R. solani and plant-parasitic nematodes was found, instead there was an effect of treatment with lower tuber yield when nematodes occurred alone. There were differences among the cultivars regarding incidence of black scurf, dry weight of stems and tubers, and there was interactive effects between treatment and cultivar regarding dry weight of stolons and roots. Therefore, results concerning incidence and damage of R. solani and/or plant-parasitic nematodes found for one cultivar may not be applicable to other cultivars.Resumen El daño en el cultivo se asocia con infección por fitopatógenos, pero también puede surgir a través de factores abióticos. No obstante, los patógenos de plantas están involucrados en interacciones bióticas con otros patógenos, y estas interacciones pudieran diferir dependiendo de la variedad del cultivo. Aquí, se investigó la interacción entre el hongo Rhizoctonia solani (AG3) y nematodos fitoparásitos de vida libre en un experimento en macetas con diferentes variedades de papa. No se encontró una interacción sinergística entre R. solani y los nematodos fitoparásitos, en cambio, hubo un efecto de tratamiento con rendimiento más bajo de tubérculo cuando los nematodos estaban solos. Hubo diferencias entre variedades en relación a la incidencia de costra negra, peso seco de los tallos y los tubérculos, y hubo efectos interactivos entre tratamiento y variedad en relación al peso seco de los estolones y las raíces. De aquí que los resultados concernientes a la incidencia y daño de R. solani y/o nematodos fitoparásitos que se encontraron para una variedad pudieran no ser aplicables a otras.

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Section: Discussionmentioning

confidence: 50%

Section: Discussionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

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Cultivar Effects on the Interaction between Free-Living Plant-Parasitic Nematodes and the Fungal Pathogen Rhizoctonia solani in Potato

2017

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“…Verticillium dahliae Kleb. is the most important pathogen of the potato early dying complex in Wisconsin (13). Vascular fungal pathogens such as V. dahliae cause water stress in host plants by decreasing the hydraulic conductance of the xylem (1,16,25).…”

Section: Methodsmentioning

confidence: 99%

Mechanism of Photosynthesis Decrease by Verticillium dahliae in Potato

Bowden¹,

Rouse²,

Sharkey³

1990

Plant Physiol.

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Young, visually symptomless leaves from potato (Solanum tuberosum) plants infected with Verticillium dahliae exhibited reduced carbon assimilation rate, stomatal conductance, and intercellular C02, but no increase in dark respiration, no change in the relationship between carbon assimilation rate versus intercellular C02, and no change in light use efficiency when intercellular CO2 was held constant. Therefore, the initial decrease in photosynthesis caused by V. dahliae was caused by stomatal closure.Errors in the intercellular CO2 calculation caused by uneven distribution of carbon assimilation rate across the leaf were tested by "4CO2 autoradiography. Patchiness was found at a low frequency. Low stomatal conductance was correlated with low leaf water potentials. Infection did not affect leaf osmotic potentials.on the biochemistry of photosynthesis can be ruled out, especially if the relationship is determined at several light levels. If differences are found between control and infected plants, these differences can be interpreted using biochemically based models of photosynthesis (9,20).Using this analysis can be complicated when stomata close unevenly across the leaf (6,23). This patchiness has been observed in water-stressed plants (6, 21). The occurrence of patchy photosynthesis can be checked by autoradiography.We have tested for patchy photosynthesis using autoradiography in control and Verticillium infected potatoes. We determined the relationship between photosynthesis and Ci at three light levels. Then we compared the relationship between stomatal conductance and water potential. MATERIALS AND METHODSThe potato early dying disease causes losses of 30 Inoculum PreparationInoculum was produced from pathogenic cultures of Verticillium dahliae which were isolated from potato. In experiment 1, eight cultures were grown on 10% strength Difco potato dextrose agar for 2 weeks. The agar containing the fungal colonies was homogenized in a blender, then mixed with peat-vermiculite at the rate of 1 mL/L of soil mix. The infested soil was dried and stored 5 months at room temperature prior to use.In experiments 2 through 4, three isolates of V. dahliae from potato were grown on autoclaved rye grain at 20°C for 4 weeks. The infested grain was dried for 2 weeks at room temperature, then ground in a Wiley mill. Dried, ground rye www.plantphysiol.org on May 12, 2018 -Published by Downloaded from

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“…The canker is commonly known as black scurf. The pathogen is also involved in the early dying syndrome of potato (KOTCON et al, 1985). In winter, the pathogen usually lives as mycelium or sclerotia in the soil and in or on infected perennial plants or propagative material such as potato tubers.…”

Section: Introductionmentioning

confidence: 99%

Effect of organic amendment on stem canker and black scurf disease of potato (Solanum tuberosum)

Rahman¹,

Ali²,

Dey³

et al. 2016

Biosci. J.

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An experiment was conducted at Tuber Crops Research Centre, BARI, Bogra during [2008][2009] to evaluate the organic amendment for controlling the stem canker and black scurf of potato. The different kinds of organic amendments were: T 1 =Poultry refuse (PR) at 4 t ha -1 , T 2 =PR at 5 t ha -1 , T 3 =PR at 6 t ha -1 , T 4 =Mustard oil cake (MOC) at 300kg ha -1 , T 5 =MOC at 500kg ha -1 , T 6 =Neem oil cake (NOC) at 300kg ha -1 , T 7 =NOC at 500kg ha -1 , T 8 =Sawdust burning and T 9 = Control. The experiment was laid out in a randomized complete block design (RCBD) with four replications. The organic amendment significantly influenced the disease incidence, yield attributes and yield of potato. The lowest disease incidence (17.5%) and per cent disease index (9.99) were found in T 3 (poultry waste at 6 t ha -1 ). The minimum russet, deformed and Sclerotia infected tubers were also recorded in poultry waste at 6 t ha -1 . The highest healthy tubers and tuber yield were found in the same treatment. Therefore, poultry manure 6 t ha -1 along with recommended dose of chemical fertilizer can be recommended to produce healthy tubers and maximum tuber yield of potato.

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Interactions ofVerticillium dahliae, Colletotrichum coccodes, Rhizoctonia solani,andPratylenchus penetransin the Early Dying Syndrome of Russet Burbank Potatoes

Cited by 48 publications

References 0 publications

Cultivar Effects on the Interaction between Free-Living Plant-Parasitic Nematodes and the Fungal Pathogen Rhizoctonia solani in Potato

Cultivar Effects on the Interaction between Free-Living Plant-Parasitic Nematodes and the Fungal Pathogen Rhizoctonia solani in Potato

Mechanism of Photosynthesis Decrease by Verticillium dahliae in Potato

Effect of organic amendment on stem canker and black scurf disease of potato (Solanum tuberosum)

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