Abstract: Light is a key environmental signal. Light,most notably blue light,may regulate many aspects of the biology of fungi,including vegetative growth,development of fruiting body,the circadian rhythm,pigment formation and varied metabolic pathways. Zygomycete fungi are generally sensitive to environmental signals,especially light stimulation and have obvious tendency,and have served as model organisms to studying light signal transduction in fungi. Zygomycete fungi are at early stage of fungal evolution,i.e.,in low evolution. Their multi-copy blue photo-receptor proteins usually form perfect photoreceptor system during long-term evolution,which may sense blue and near ultraviolet lights at different wavelengths,intensities and directions,thus play a critical role in phototaxis and carotenoid synthesis of zygomyceta,as well as in the photo-response of asexual and sexual reproduction. In this paper,we took the representative strains of Zygomyceta as an example,summarized the blue-light photoreceptor proteins reported by several researchers,and made a comparative analysis from the aspects of gene discovery,function identification,photochemical characteristics,regulatory pathways,etc. Moreover,based on the above three（four）aspects,we described special physiological process mediated and regulated by blue-photoreceptors thatwere entirely different from it in higher plant. In the end,we suggested the future focuses and the confronting difficulties on the studies of blue-photoreceptors in zygomycetes,expecting for providing direction and reference for the researchers in this field.

Key words: zygomyceta, blue-light photoreceptor, phototropism, light-induced carotenoid synthesis