The germination problem of oat seed lots affected by Fusarium head blight

Tekle, Selamawit; Skinnes, Helge; Bjørnstad, Åsmund

doi:10.1007/s10658-012-0074-6

Cited by 32 publications

(37 citation statements)

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“…These authors observed a significant negative correlation between kernel wheat weight and mycotoxin production. Besides, weight in the soybean seed or the wheat caryopsis also are supported by mycotoxins presence, as was previously reported by Kiekana et al (2002), and Tekle et al (2012). Additionally, Fusarium invasion could kill the germ and reduce seed germination, and yields.…”

Section: Resultssupporting

confidence: 64%

EFFECT OF Fusarium graminearum Schwabe ON PHYSIOLOGICAL QUALITY OF SOYBEAN SEEDS AND WHEAT CARYOPSIS IN ARGENTINA

Peruzzo

Pioli²,

Salinas³

2015

Rev. Caatinga

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-F. graminearum is the main causal agent of Head blight in cereals in Argentina. This is a disease that develops during the host floral state. When the reproductive structures in the host are invaded, grains may be shriveled and reduced in weight, causing a decrease in yield. Physiological diagnostic techniques on seeds detect the damages produced by this fungus could be used to take decisions related to the quality of seed lots. The objective of this study was to evaluate the possible physiological damage caused by F. graminearum isolates in soybean seeds and wheat caryopsis. Seeds and caryopsis were obtained from plants exposed to fungal infection and were evaluated under two situations: artificial inoculations under greenhouse conditions and natural infection from fields of Santa Fe Province (33°43'22''S; 62°14'46''W). Seed weight, topographical tetrazolium test, standard germination test, electrical conductivity test and X-ray test were performed in soybean seeds and wheat caryopsis from each treatment. Differential behaviors of F. graminearum strains in susceptible soybean and wheat cultivars under greenhouse conditions revealed specific interactions among soybean and wheat genotypes with this fungus. F. graminearum infection in susceptible cultivars under greenhouse conditions produced a significant decrease in the physiological quality of soybean seed and wheat caryopsis. These behaviors were not detected under field conditions in the evaluated locations. All seed quality tests used in this experiment were useful to show differences in infection in soybean and wheat independently of F. graminearum infection.Keywords: X-Ray. Tetrazolium. Germination. Electric conductivity. Pampean region. EFEITO DE Fusarium graminearum Schwabe NA QUALIDADE FISIOLÓGICA DE SEMENTES DESOJA E CARIOPSE DE TRIGO NA ARGENTINA RESUMO -F. graminearum é o principal agente causal da giberela em cereais na Argentina. É uma doença que se desenvolve durante o estado floral de hospedeiro. Quando as estruturas reprodutivas no hospedeiro são colonizadas, os grãos podem ser enrugados e mostrar reduções de peso, causando diminuição no rendimento. Técnicas de diagnóstico fisiológico em sementes podem detectar os danos produzidos por este fungo e pode ser usada para tomar decisões sobre a qualidade dos lotes. O objetivo deste estudo foi avaliar possíveis danos fisiológicos causados por F. graminearum em sementes de soja e cariopses de trigo. As sementes e cariopses foram obtidas a partir de plantas expostas a infecção fúngica e foram avaliadas em duas situações: inoculação artificial em casa de vegetação e infecção natural em campos da Província de Santa Fé (33°43'22''S; 62°14'46''O). Determinou-se o peso da semente e realizou-se os testes de tetrazólio, germinação, condutividade elétrica e raios-X em sementes de soja e cariopses de trigo para cada tratamento. Comportamentos diferenciais de cepas de F. graminearum em cultivares suscetíveis de soja e trigo sob condições de casa de vegetação revelou interações específicas entre cultivar...

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Section: Resultssupporting

confidence: 64%

EFFECT OF Fusarium graminearum Schwabe ON PHYSIOLOGICAL QUALITY OF SOYBEAN SEEDS AND WHEAT CARYOPSIS IN ARGENTINA

Peruzzo

Pioli²,

Salinas³

2015

Rev. Caatinga

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“…This may of course also lead to differences in temperature during grain filling. Although DON is less affected by scoring time than FHB, humid weather late in grain development may increase DON levels (Tekle et al., ).…”

Section: Discussionmentioning

confidence: 99%

“…However, other factors may counteract this. The use of spawn rather than spray inoculation, allowing a continuous presence of ascospores, may better mimic natural conditions (Tekle et al., ). Second, the positive correlations between lateness and disease level reported in Finland (Parikka et al., ) and Russia (Gavrilova et al., ) may be ascribed to rainfall favouring disease in late lines.…”

Section: Discussionmentioning

confidence: 99%

Genetic variation and associations involving Fusarium head blight and deoxynivalenol accumulation in cultivated oat (Avena sativa L.)

Bjørnstad

Tekle

et al. 2017

Plant Breeding

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Resistance in oats (Avena sativa L.) to Fusarium graminearum was phenotyped in 424 spring oat lines from North America and Scandinavia and genotyped with 2974 SNP markers. Fusarium head blight (FHB), deoxynivalenol (DON) content, days to flowering (DTF) and days to yellow maturity (DTM) were scored in field trials in 2011–12. Trials with phenotypic ranges from 1 to 30 ppm, and sufficient accuracy were obtained by an augmented design and spawn inoculation. Discriminant analysis–PCA identified the different gene pools, with overlaps corresponding to known pedigrees and germplasm exchanges. Structure was negligible and GWAS (genomewide association study) was done using mixed linear models in TASSEL or partial least‐squares regression (PLSR). PLSR allows simultaneous analyses of several phenotypes (environments and/or traits) and is a promising tool for GWAS in plants and should be tested in species with sequenced genomes. FHB was associated with phenology QTLs, due to very susceptible early lines from the Midwest. Lines with consistently low DON (and early heading) were identified. Six QTLs for DON were not associated with earliness, including three QTLs reported previously.

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“…Actuellement, la méthode qui est encore la plus répandue pour résoudre le problème de la germination des semences de céréales demeure la congéla-tion sur papier buvard (Hajihasani et al 2012;Mobasser et al 2012;Tekle et al 2013). Par contre, cette méthode non sélective peut se révéler imprécise pour détecter les Fusarium spp.…”

Section: Stéphan Pouleur Et Luc Coutureunclassified

Amélioration de la détection des Fusarium spp. et du Bipolaris sorokiniana dans les semences par l’ajout de paraquat dans les milieux de culture

Pouleur

Couture

2013

phyto

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La germination des graines complique les analyses de l’état sanitaire des semences effectuées sur milieux de culture gélosés. Cette recherche visait à identifier un inhibiteur de la germination des semences inoffensif pour les Fusarium spp. et le Bipolaris sorokiniana, des champignons pathogènes qui diminuent le pouvoir germinatif et l’état sanitaire des semences. Dans des essais préliminaires, le NaCl a été écarté, alors que le paraquat a été retenu comme candidat le plus prometteur. Des doses de paraquat de 0 à 80 mg L-1 ont été évaluées pour le recouvrement des Fusarium sur un milieu peptone-PCNB (pentachloronitrobenzène) et du B. sorokiniana sur un milieu PDA-bénomyl. Des lots de semences d’avoine, de blé et d’orge contaminés à différents degrés ont été utilisés. On a déterminé la contamination par ces champignons, la germination totale et la germination nuisible des graines après 7 j. Les doses de 40 mg L-1 pour les Fusarium spp. et de 50 mg L-1 pour le B. sorokiniana ont été retenues pour leur efficacité. On a aussi observé une diminution de divers contaminants importuns, dont des levures et des Rhizopus spp. L’ajout du paraquat aux deux milieux de culture apporte une nette amélioration technique pour la détection de ces champignons pathogènes dans les semences de céréales.Seed germination complicates seed health tests performed on agar culture media. The objective of this research was to identify an inhibitor of seed germination that does not affect recovery of Fusarium spp. and Bipolaris sorokiniana, two fungal pathogens that reduce seed germination and seed health. During preliminary assays, NaCl was rejected while paraquat was identified as the best candidate. Paraquat doses ranging from 0 to 80 mg L-1 were evaluated for the recovery of Fusarium spp. on peptone-PCNB (pentachloronitrobenzene) agar and for the recovery of B. sorokiniana on a PDA-benomyl medium. Seed lots of oat, wheat, and barley, infected at different degrees, were used for the trials. Contamination with both fungi as well as total and detrimental germinations were determined after 7 d. Doses of 40 mg L-1 for Fusarium spp. and 50 mg L-1 for B. sorokiniana detection were identified as the most efficient. We also noticed a reduction in some contaminants such as yeasts and Rhizopus spp. The addition of paraquat into culture media to detect these pathogens constitutes a significant improvement of the seed health testing techniques used in cereals

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The germination problem of oat seed lots affected by Fusarium head blight

Cited by 32 publications

References 32 publications

EFFECT OF Fusarium graminearum Schwabe ON PHYSIOLOGICAL QUALITY OF SOYBEAN SEEDS AND WHEAT CARYOPSIS IN ARGENTINA

EFFECT OF Fusarium graminearum Schwabe ON PHYSIOLOGICAL QUALITY OF SOYBEAN SEEDS AND WHEAT CARYOPSIS IN ARGENTINA

Genetic variation and associations involving Fusarium head blight and deoxynivalenol accumulation in cultivated oat (Avena sativa L.)

Amélioration de la détection des Fusarium spp. et du Bipolaris sorokiniana dans les semences par l’ajout de paraquat dans les milieux de culture

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