Characterizing the Synergistic Response Induced by Warm Temperatures and Shade

Plants exhibit an impressive capability to detect and respond to neighboring plants by closely monitoring changes in the light spectrum. They possess the ability to perceive adjustments in the ratio of red (R) to far-red (FR) light (R/FR) triggered by the presence of nearby plants, even before experiencing complete shading. When the R/FR ratio falls below 1, plants activate a shade avoidance response that manifests as hypocotyl elongation. Furthermore, elevated ambient temperatures can also stimulate hypocotyl elongation. As hypocotyl elongation is a visible characteristic, it is a valuable indicator for monitoring shade avoidance response, warm ambient temperature response, and the interplay between the two.