Occurrence of Fusarium species in asymptomatic barley plants grown in field conditions under differential nutritional regime

ECHEVERRIA M; MORENO MV; CAPUTO C

CURRENT SCIENCE

INDIAN ACAD SCIENCES

Lugar: Bangalore ; Año: 2018 vol. 115 p. 939 - 944

0011-3891

In this research we analysed the occurrence of genus Fusarium in roots of healthy barley plants cultivated at field under two levels of phosphorous (P) in order to evaluate the widespread of Fusarium spp. colonization and the possible influence of P nutrition on its distribution. F. avenaceum, F. graminearum, F. konzum, F. oxysporum, F. sacchari, F. scirpi, F. solani were recorded. F. konzum and F. solani were only present in treatment fertilized, whereas F. sacchari in the unfertilized one. F. scirpi presented the highest frequency and relative density, and increased under P deficiency suggesting that P availability would determinate the occurrence of this species, which encourages the study about F. scirpi capacity to mitigate this or other stresses. This is the first report about 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 the barley plants or latent pathogens and could produce disease symptoms in other conditions.