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Figure 5 | BMC Plant Biology

Figure 5

From: Design and fabrication of adjustable red-green-blue LED light arrays for plant research

Figure 5

Norlux arrays induce typical light responses during early seedling development. A) Blue light fluence-rate response experiments demonstrate the effect of increased fluence rates of blue light on stem growth after 72 h (filled circles; n = 60). The cry1 mutant was tested for comparison (n = 62). B) Fluence-rate/response experiments were performed using red light and demonstrate growth inhibition in wild-type seedlings (filled circles; n = 70) compared to phyB mutants (open circles; n = 60). C) The stem-stimulatory effect of a short single pulse of green light is shown (open circles) and compared to previously published results ([17]; filled circles), and dark growth kinetics (dotted line). D) Phototropic curvature in response to blue light was measured in etiolated seedlings (filled circles; n = 21) and compared to results from previous reports ([30]; open circles). These findings demonstrate how the HEX arrays and the designs presented herein have utility in study of integration of light information from multiple photosensory systems.

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