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. 2015 Aug 21;169(2):1382–1396. doi: 10.1104/pp.15.00276

Table II. Kinematic analysis, describing the effect of mild and severe drought stress on cell division and cell expansion parameters during the steady-state growth of the fifth leaf of wild-type and transgenic plants overexpressing an Arabidopsis gene encoding an FeSOD enzyme.

A two-way ANOVA was used to determine statistically significant differences between the three treatments and the two maize lines, and P values > 0.05 are marked as NS (not significant). Data are averages ± se (n = 4). Parameters are as follows: leaf length (LL; measured on the fifth leaf at the time of harvesting; Supplemental Fig. S1), LER (calculated during the first 3 d after leaf appearance), mature cell length (Lmat), cell production rate (P), cell division rate (D), cell cycle duration (Tc), length of the meristem (Lmer), number of cells in the meristem (Nmer), time in the division zone (Tdiv), cell elongation rate (Rel), and time in the elongation zone (Tel).

Parameter Wild-Type Control 35S-FeSOD Control Wild-Type Mild Stress 35S-FeSOD Mild Stress Wild-Type Severe Stress 35S-AtFeSOD Severe Stress Treatment Lines
LL (mm) 802 ± 21 894 ± 8 662 ± 51 755 ± 43 402 ± 73 439 ± 54 S S
LER (mm h−1) 2.5 ± 0.1 3.0 ± 0.1 1.7 ± 0.3 2.3 ± 0.2 1.0 ± 0.2 1.1 ± 0.4 S S
Lmat (µm) 135 ± 12 112 ± 11 126 ± 10 116 ± 4 103 ± 4 105 ± 4 NS NS
P (cells h−1) 19 ± 2 28 ± 2 13 ± 2 20 ± 3 10 ± 2 11 ± 4 S S
D (cell cell−1 h−1) 0.025 ± 0.003 0.033 ± 0.003 0.016 ± 0.002 0.023 ± 0.004 0.013395 ± 0.004 0.015 ± 0.005 S NS
Tc (h) 29 ± 3 22 ± 2 46 ± 7 33 ± 5 62 ± 19 76 ± 32 S NS
Lmer (mm) 20 ± 1 20 ± 0 15 ± 0 14 ± 1 11 ± 0 13 ± 1 S NS
Nmer 810 ± 109 865 ± 122 799 ± 63 883 ± 46 782 ± 99 757 ± 100 NS NS
Rel (µm µm−1 h−1) 0.031 ± 0.002 0.035 ± 0.002 0.021 ± 0.005 0.030 ± 0.003 0.014283 ± 0.001 0.017 ± 0.006 S NS
Tel (h) 52 ± 6 42 ± 5 81 ± 19 64 ± 8 102 ± 4 133 ± 41 S NS