TY - JOUR
T1 - Secretomics identifies Fusarium graminearum proteins involved in the interaction with barley and wheat
AU - Yang, Fen
AU - Jensen, Jens Due
AU - Svensson, Birte
AU - Jørgensen, Hans Jørgen Lyngs
AU - Collinge, David B.
AU - Finnie, Christine
PY - 2012/6
Y1 - 2012/6
N2 - Fusarium graminearum is a phytopathogenic fungus primarily infecting small grain cereals, including barley and wheat. Secreted enzymes play important roles in the pathogenicity of many fungi. In order to access the secretome of F.graminearum, the fungus was grown in liquid culture with barley or wheat flour as the sole nutrient source to mimic the host-pathogen interaction. A gel-based proteomics approach was employed to identify the proteins secreted into the culture medium. Sixty-nine unique fungal proteins were identified in 154 protein spots, including enzymes involved in the degradation of cell walls, starch and proteins. Of these proteins, 35% had not been identified in previous inplanta or invitro studies, 70% were predicted to contain signal peptides and a further 16% may be secreted in a nonclassical manner. Proteins identified in the 72 spots showing differential appearance between wheat and barley flour medium were mainly involved in fungal cell wall remodelling and the degradation of plant cell walls, starch and proteins. The inplanta expression of corresponding F.graminearum genes was confirmed by quantitative reverse transcriptase-polymerase chain reaction in barley and wheat spikelets harvested at 2-6days after inoculation. In addition, a clear difference in the accumulation of fungal biomass and the extent of fungal-induced proteolysis of plant β-amylase was observed in barley and wheat. The present study considerably expands the current database of F.graminearum secreted proteins which may be involved in Fusarium head blight.
AB - Fusarium graminearum is a phytopathogenic fungus primarily infecting small grain cereals, including barley and wheat. Secreted enzymes play important roles in the pathogenicity of many fungi. In order to access the secretome of F.graminearum, the fungus was grown in liquid culture with barley or wheat flour as the sole nutrient source to mimic the host-pathogen interaction. A gel-based proteomics approach was employed to identify the proteins secreted into the culture medium. Sixty-nine unique fungal proteins were identified in 154 protein spots, including enzymes involved in the degradation of cell walls, starch and proteins. Of these proteins, 35% had not been identified in previous inplanta or invitro studies, 70% were predicted to contain signal peptides and a further 16% may be secreted in a nonclassical manner. Proteins identified in the 72 spots showing differential appearance between wheat and barley flour medium were mainly involved in fungal cell wall remodelling and the degradation of plant cell walls, starch and proteins. The inplanta expression of corresponding F.graminearum genes was confirmed by quantitative reverse transcriptase-polymerase chain reaction in barley and wheat spikelets harvested at 2-6days after inoculation. In addition, a clear difference in the accumulation of fungal biomass and the extent of fungal-induced proteolysis of plant β-amylase was observed in barley and wheat. The present study considerably expands the current database of F.graminearum secreted proteins which may be involved in Fusarium head blight.
U2 - 10.1111/j.1364-3703.2011.00759.X
DO - 10.1111/j.1364-3703.2011.00759.X
M3 - Journal article
SN - 1464-6722
VL - 13
SP - 445
EP - 453
JO - Molecular Plant Pathology
JF - Molecular Plant Pathology
IS - 5
ER -