Phytochrome is one of the most important photoreceptors sensing the changes of the surrounding environment,which not only plays an important role in regulation of plant growth and development,but also modulates plant stress responses against both biotic and abiotic stresses. Some researches indicated that mutation of the phytochromes decreases defense resistance against biotic stresses like pathogens,and herbivores infection as well as abiotic stresses including cold,heat,drought,salinity and so on. Plant r...