Table III.

Amyloplast sedimentation velocities of Arabidopsis S1 to S3 columella tiers

Cell Type2-aVelocity2-bSedimentation2-c
μm min−1 %
S1, central columella0.909  ± 0.059 (55)100
S1, flank columella0.4960  ± 0.060 (54)2 66.67
S2, central columella1.200  ± 0.059 (56)100
S2, flank columella0.640  ± 0.058 (57)2 78.95
S3, central columella0.085  ± 0.064 (47)1 14.89
S3, flank columella0.072  ± 0.059 (56)1 8.93

Amyloplast sedimentation was measured over 5 min after 135° rotation of live roots on a vertical stage microscope. Values are means ± se. Values in parentheses are n values, the number of cells observed from 25 or more roots.

    • F2-a See Figure 1B for definition of cell type analyzed.

    • F2-b Sedimentation velocities (averages of all observed cells) are significantly different as determined by ANOVA/Tukey's Honestly Significant Difference test (P < 0.02) except as shown (1 and2).

    • F2-c Percentages indicate proportions of cells with sedimentable amyloplasts.