They recommended a mixture of blue and red LEDs to enhance lettuce crop quality and yield in closed - type plant production systems. (sciencedaily.com)
The increased use of LEDs in environmentally controlled closed - type plant production systems allows crop production throughout the year, regardless of external weather conditions. (sciencedaily.com)
In wild type plants, for example, the root tip immediately starts to grow back in the direction of the gravitational stimulus — this is clearly visible already after six hours (upper plant, yellow arrow). (sciencedaily.com)