Pectolytic isoenzymes by<i>Fusarium oxysporum</i>f. sp. cepae and antifungal compounds in onion cultivars as a response to pathogen infection

Özer, Nuray; Köycü, D.; Chilosi, G.; Pizzuolo, Pablo Humberto; Coşkuntuna, Arzu; Magro, P.

doi:10.1080/07060660309507077

Cited by 11 publications

(12 citation statements)

References 26 publications

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“…wäre mittels biochemischer bzw. molekularbiologischer Untersuchungen zu zeigen (Bayraktar et al 2010;galvan et al 2008;bayraktar und Dolar 2011;Swift et al 2002;Dissanayake et al 2009;Özer et al 2003;elZawahry et al 2000).…”

Section: Gewicht (G)unclassified

Auftreten und Nachweis von Fusarium oxysporum und F. proliferatum an Steck- und Saatzwiebeln

et al. 2011

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3O r i g i n a l b e i t r a g Zusammenfassung Der erreger der Zwiebelbasalfäule, Fusarium oxysporum f. sp. cepae, ist aufgrund seiner hohen temperaturansprüche vorwiegend in wärmeren anbauregionen verbreitet. Mittlerweile tritt er auch in Deutschland auf, insbesondere in Jahren mit höheren Durchschnittstemperaturen während der Vegetationszeit. Phytopathologische Untersuchungen an 300 symptomlosen Zwiebelbulben zeigten, dass ca. 10 % der bulben mit Fusarium spp. infiziert waren, wobei die art F. oxysporum dominierte. Steckzwiebeln, die auf diesen Flächen als Pflanzgut eingesetzt wurden, waren zu 19 bis 98 % latent mit F. oxysporum befallen. Das kontaminierte Pflanzgut führte bis zur Ernte jedoch nicht wie erwartet zu einem entsprechend hohem Auftreten an Pflanzen mit für die Zwiebelbasalfäule charakteristischen Symptomen wie nass-oder trockenfäule. es ist davon auszugehen, dass die Symptomausprägung insbesondere von den gegebenen klimatischen bedingungen beeinflusst wird. Dies unterstützen Ergebnisse zu Untersuchungen der Pathogenität isolierter Fusarium spp.-isolate unter kontrollierten Kulturbedingungen. So resultierte eine inokulation des Kultursubstrates mit ausgewählten Fusarium spp.-isolaten unter für den Zwiebelanbau suboptimalen Kulturbedingungen in einer Reduktion des Pflanzenaufgangs um bis zu 70 %, während dies unter optimalen Kulturbedingungen nicht zu beobachten war. Unter optimalen bedingungen wurde jedoch in späteren entwicklungsstadien eine Reduktion des Pflanzenwachstums festgestellt. neben F. oxysporum wurde sowohl an den Zwiebeln und insbesondere am Saatgut F. proliferatum nachgewiesen. Dieser gleichfalls wärmeliebende Pilz kam in allen untersuchten Saatgutproben vor, wobei Kontaminationsraten bis zu 62 % ermittelt wurden. Für F. oxysporum wurde dagegen nur eine Befallshäufigkeit von unter 1,5 % an einigen Saatgutproben ermittelt. Für beide arten F. oxysporum und F. proliferatum konnte deren Pathogenität an der Zwiebel bestätigt werden; wenngleich große Unterschiede in der Virulenz der isolate zu verzeichnen waren.Schlüsselwörter Zwiebel · Fusarium oxysporum f. sp. cepae · Fusarium proliferatum · nachweis · Pathogenität Occurrence and Detection of Fusarium oxysporum and F. proliferatum on Sown and Planted OnionsAbstract the pathogen Fusarium oxysporum f. sp. cepae inducing the Fusarium basal rot mainly spreads in warmer cultivation regions due to its adaptability to high temperature. Meanwhile the pathogen occurs in germany as well, especially in years with relatively high average temperature during the growing season. Phytopathological investigations of 300 symptomless onion bulbs showed a contamination rate of approximately 10% with regard to Fusarium spp., with F. oxysporum proving to be the predominant species. Onion sets planted in these fields were latently infected with F. oxysporum at rates of 19-98%. Unexpectedly, the contaminated sets did not indispensably lead to a high occurrence of plants exhibiting characteristic symptoms of Fusarium basal rot such as wet and dry rot. PresumGesund...

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Section: Gewicht (G)unclassified

Auftreten und Nachweis von Fusarium oxysporum und F. proliferatum an Steck- und Saatzwiebeln

et al. 2011

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“…f. sp. cepae (Hans) Synder and Hans (FOC) is caused seedborne and soilborne diseases such as damping off and basal root (Köycü and Özer, 1997;Özer et al, 2003). This pathogen may be seen and noticed in different growth stages of onion and can cause serious loss in the field and during storage (Fantino and Schiavi, 1987;Özer et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

“…cepae (Hans) Synder and Hans (FOC) is caused seedborne and soilborne diseases such as damping off and basal root (Köycü and Özer, 1997;Özer et al, 2003). This pathogen may be seen and noticed in different growth stages of onion and can cause serious loss in the field and during storage (Fantino and Schiavi, 1987;Özer et al, 2003). Symptoms of Fusarium basal rot (FBR) appear on leaves, roots, basal plates, on the bulb scales of small seedlings, on the mature and dormant plants (Cramer, 2000;Özer et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

“…This pathogen may be seen and noticed in different growth stages of onion and can cause serious loss in the field and during storage (Fantino and Schiavi, 1987;Özer et al, 2003). Symptoms of Fusarium basal rot (FBR) appear on leaves, roots, basal plates, on the bulb scales of small seedlings, on the mature and dormant plants (Cramer, 2000;Özer et al, 2003). Symptoms are pre-and post-emergence damping-off of seedling in the field, root rot in older plants, discoloration in onion stem plate, basal rot in bulbs during storage (Abawi and Lorbeer, 1972;Cramer, 2000).…”

Section: Introductionmentioning

confidence: 99%

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Determination of Resistance Levels of Some Onion Cultivars or Inbreed Lines with Fusarium Testing at Seedling Stage

KARABULUT¹,

Gökçe²

2022

Horticultural Studies

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This study was carried out to determine the resistance levels of some onion genotypes in Yalova onion gene pool by Fusarium testing during seedling stage. The isolate used in the study was Fusarium oxysporum f. sp. cepae, which causes damping off during the seedling stage and later basal rot in onion bulbs. The variance analysis for the onion seedling test and the mean differences against control were analyzed by using General Linear Model of the Tukey test. The germination rate of control seeds varied between 72% to 98%, while the germination rate of inoculated seeds varied between 39% to 93%. Texas Early Grano 502 showed the highest level of resistance with a survival rate of 83.8%, and resistance levels of 19Y07 and 19Y142 genotypes were higher than other genotypes. Resistance levels of 19Y51, 19Y15 and 19Y73 genotypes were lower than other genotypes. Akgün 12 showed moderate resistance with a survival rate of 59.6%. Determining the resistance levels of these onion genotypes during the seedling stage may be a preliminary step towards further studies.

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“…Rot and Red-brown discoloration expand at the margin of the root-basal plate, and bulbs and stems get reddish-purple discoloration as the Fusarium ties up from the plate into scales. With the progression of the disease, the whole plant can crumple, and when the fungus infects the shallot at maturity, the infestation can cause serious postharvest losses (Entwistle, 1990;Ozer et al,2003).…”

Section: Introductionmentioning

confidence: 99%

Shallot Basal Bulb Rot Management through Integration of Trichoderma asperellum, Composted Plant Residues and Natural Mulch

Ismail¹,

Rosmana²,

Sjam³

et al. 2020

J Pure Appl Microbiol

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Basal bulb rot (BBR) of shallot caused by Fusarium oxysporum f. sp. cepae is one of the highly deleterious diseases on shallot, Allium cepa L. var ascalonicum Backer. in Indonesia. This study aimed to assess the potency of organic mulch, composted plant residues, and endophytic Trichoderma asperellum to control this disease. Treatment with mulch alone, mulch plus compost, mulch plus T. asperellum, and combination of all the three provided the decrease of BBR incidence by 15%, 20%, 29%, and 39% and the increase of shallot productivity by 22%, 66%, 84%, and 125%, respectively. Observation of another treatment impact on the fungal occurrence at harvest time indicated that their population in soil increased by 671%, 771%, 257%, and 814% and the fungal colonization in root tissues mounted by 31%, 77%, 77%, and 74%, respectively. The introduced Trichoderma was found predominantly, especially in leaf tissues of inoculated shallot. These data showed that all the treatments were able to control BBR disease. However, the most effective was the mulch in combination with compost and T. asperellum. Therefore, large-scale disease control could take advantage of this integration.

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Pectolytic isoenzymes byFusarium oxysporumf. sp. cepae and antifungal compounds in onion cultivars as a response to pathogen infection

Cited by 11 publications

References 26 publications

Auftreten und Nachweis von Fusarium oxysporum und F. proliferatum an Steck- und Saatzwiebeln

Auftreten und Nachweis von Fusarium oxysporum und F. proliferatum an Steck- und Saatzwiebeln

Determination of Resistance Levels of Some Onion Cultivars or Inbreed Lines with Fusarium Testing at Seedling Stage

Shallot Basal Bulb Rot Management through Integration of Trichoderma asperellum, Composted Plant Residues and Natural Mulch

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