Figure 3. Means ± 1 standard error of sunflower plasticity in response
to cold treatment (5°C night and 18°C day) for above-ground (green) and
root (brown) traits. Values less than 1 indicate a lower value for the
cold than control treatment, while values greater than 1 indicate a
higher value for the cold than control treatment. Asterisks indicate the
significance of the Student’s t-test between the cold and control
treatments. ***: p < 0.001, **: p < 0.01, *: p
< 0.05, NS: non-significant. Root diameter, projected area,
length, weight and number of roots tip were measured under hydroponic
conditions only, while other traits were measured under both potted soil
and hydroponic conditions. Corresponding experimentations were 19CA01,
20CA01,20CA03, 22CA01, 19CA04, 20CA02, 20HP01, 21HP01,
22HP02. |