The skotonastic and phototropic responses of primary leaves of bean (Phaseolus vulgaris L.) were studied, using one primary leaf as an untreated control for its treated twin. A sudden, drastic step-down in photon fluence rate, ΦFR, resulted in the typical skotonastic downfolding. The magnitude and kinetics of this response were independent of the preceding ΦFR as well as of the initial laminar elevation (at transition). The skotonastic response was eventually followed by increase in laminar elevation, as part of a progressive adaptation to the new (very low) ΦFR. The pulvinus exhibited positive and reversible phototropic curvature in response to adaxial and lateral exposure to high ΦFR. Adaxial exposure at different stages of its adaptation to low ΦFR resulted in very similar positive phototropic responses (rate and magnitude). At saturation, abaxial exposure of the pulvinus to equivalent ΦFR resulted in full reversal, to the same level as exposure of both sectors to low ΦFR, coinciding with the level of the non-exposed controls. Pulvinar responses involve processes of solute transport, tightly coupled to transport of water. The results suggest that phototropic pulvinar responses and those that are part of the skotonastic and adaptation responses are not only different, but are also independent of each other and can take place simultaneously.