The term “phyllosphere” refers to the world of microbes that interact among themselves and with their plant hosts above ground. In this review, the authors explore what is known about this interesting habitat and how abiotic factors, especially light, influences the interactions and survival of its residents. In general, light is detrimental to phyllosphere microorganisms, however, some groups are able to harness the power of light and use it for energy. In this paper, the effects of full light spectra and narrow bandwidth-wavelengths from UV to far-red light are discussed. This paper provides a nice overview of what is known about plant-phyllosphere, and provides an interesting insight into future directions for continued research in this area.
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