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Occurrence of Fusarium Species in Asymptomatic Barley Plants Grown in Field Conditions Under Differential Phosphate Regimes


Affiliations
1 CONICET-Universidad de Buenos Aires, Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA), Buenos Aires, Argentina
2 CONICET-BIOLAB (CICBA-INBIOTEC-CONICET), Facultad de Agronomía (UNCPBA), Microbiología, Rep. de Italia No. 780, Azul B7300BZD, Buenos Aires, Argentina
 

Occurrence of genus Fusarium as endophytes in ischolar_mains of healthy barley plants cultivated in fields under two levels of phosphorous (P) was examined. F. avenaceum, F. graminearum, F. konzum, F. oxysporum, F. sacchari, F. scirpi, F. solani were isolated from asymptomatic surface sterilized ischolar_main tissues. F. konzum and F. solani were only present in the ischolar_mains of fertilized plants, whereas F. sacchari was present in unfertilized plants. F. scirpi was isolated in highest frequency and relative density, and was higher under P deficiency suggesting that P availability would determinate the occurrence of this species, suggesting the possibility of their association with stressed plants. This is the first report on the occurrence of Fusarium spp. as endophytes in healthy barley plants. However, it remains to be determined whether Fusarium spp. isolated are nonpathogenic forms and beneficial to barley plants or latent pathogens that could produce disease symptoms in other conditions.

Keywords

Barley (HGordeum Vulgare L.), Endophytic Fungi, Fusarium Species, Latent Pathogens, Nutritional Regime.
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  • Occurrence of Fusarium Species in Asymptomatic Barley Plants Grown in Field Conditions Under Differential Phosphate Regimes

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Authors

Mariela Echeverria
CONICET-Universidad de Buenos Aires, Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA), Buenos Aires, Argentina
Maria Virginia Moreno
CONICET-BIOLAB (CICBA-INBIOTEC-CONICET), Facultad de Agronomía (UNCPBA), Microbiología, Rep. de Italia No. 780, Azul B7300BZD, Buenos Aires, Argentina
Carla Caputo
CONICET-Universidad de Buenos Aires, Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA), Buenos Aires, Argentina

Abstract


Occurrence of genus Fusarium as endophytes in ischolar_mains of healthy barley plants cultivated in fields under two levels of phosphorous (P) was examined. F. avenaceum, F. graminearum, F. konzum, F. oxysporum, F. sacchari, F. scirpi, F. solani were isolated from asymptomatic surface sterilized ischolar_main tissues. F. konzum and F. solani were only present in the ischolar_mains of fertilized plants, whereas F. sacchari was present in unfertilized plants. F. scirpi was isolated in highest frequency and relative density, and was higher under P deficiency suggesting that P availability would determinate the occurrence of this species, suggesting the possibility of their association with stressed plants. This is the first report on the occurrence of Fusarium spp. as endophytes in healthy barley plants. However, it remains to be determined whether Fusarium spp. isolated are nonpathogenic forms and beneficial to barley plants or latent pathogens that could produce disease symptoms in other conditions.

Keywords


Barley (HGordeum Vulgare L.), Endophytic Fungi, Fusarium Species, Latent Pathogens, Nutritional Regime.

References





DOI: https://doi.org/10.18520/cs%2Fv115%2Fi5%2F939-944