WEE1 and infection: In addition, a protein kinase APK1B which is involved in stamen development and its repression can prevent pollen tube germination causing self incompatibility in Arabidopsis was observed at a later stage of U. virens rice spikelet infection suggesting that the pathogen manipulates host development signaling by prohibiting protein phosphorylation, hence allowing further infection of the plant with U. virens to occur (Chao et al., 2014).