tomato yellow leaf curl virus (tylcv) is considered as one of the most important tomato viruses in tropical and subtropical areas. in order to identify and investigate the presence of this virus in fields , greenhouses and cultivated tomato plants in tuneles of khorasan razavi, southern and northern khorasan provinces, during 2009 and 2011, plants which have been showed the symptoms were collec...

Collective migration of epithelial cells underlies diverse tissue-remodeling events, but the mechanisms that coordinate individual cell migratory behaviors for collective movement are largely unknown. Studying the Drosophila follicular epithelium, we show that the cadherin Fat2 and the receptor tyrosine phosphatase Lar function in a planar signaling system that coordinates leading and trailing ...