“…Comprehensive reviews of the photoreceptors expressed in roots and involved in the modulation of root growth can be found in Zdarska et al, 2015, Silva-Navas et al, 2015 and van Gelderen et al, 2018, among others [ 3 , 21 , 26 ]. Root meristem activity is modulated upon exogenous and endogenous stimuli [ 2 , 4 , 46 , 47 , 48 , 49 , 50 ]. Cell proliferation comes to a halt when environmental conditions are not favorable for the plant, such as when red, energy-intensive light is perceived [ 9 , 23 , 26 , 32 ].…”