The growth of plants is a process of photomorphogenesis is and light quality plays and important regulatory role in crop growth and development . this paper describe the effect of light quality on the crop of morphogenesis, photosyntesis, metabolish, gene expression and the regulative action of photoreceptor and hormone in the course . it has forecasted the orientation and path of study on the light quality on the impact of crop , put forward the significance and purpose of the research . it provides some useful information for the further study on the effect of light quality on the crop.
Key words: light quality , LED Grow Lights ,growth and development ,photosynthesis, endogenous hormone