Change over time after freezing in the percentage of red color due to Safranin staining within oat crowns.

<p>Each data point is the mean of 7 plants and each plant is the sum of the red color in 120 to 180 sections, depending on the height of the crown. The bars on the unfrozen control line show the least significant difference (Tukeys HSD) at P≤0.05).</p>