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Actin Turnover Is Required for Myosin-Dependent Mitochondrial Movements in Arabidopsis Root Hairs

Figure 2

Mitochondrial linear movements in Arabidopsis root hairs.

Mitochondria in wild-type Arabidopsis are labeled with MitoTracker (red) and their movements in a single focal plane were recorded by evanescent wave microscope at 200 millisecond intervals. A. Plot of the x-y velocity of a mitochondrion moving in the region 5–30 µm from the tip. Note that the instantaneous velocities ranged from 0.07 µm/sec to 1.53 µm/sec. From 9.8 s to 15.2 s as indicated by arrows, the mitochondrion behaved rotations and oscillations at low instantaneous velocities. B. The mean square displacement (MSD) of the pause (highlighted the start and the end by arrows in A) plotted against time interval Δt. C. Plot of the x-y velocity of a mitochondrion moving in the region 30–80 µm from the tip. Note that the instantaneous velocities ranged from 0.06 µm/sec to 3.56 µm/sec. D. Plot of the x-y velocity of a mitochondrion moving in the basal shank. Note that the instantaneous velocities ranged from 0.41 µm/sec to 7.70 µm/sec. E. Plot of the x-y velocity of a mitochondrion moving in fully grown root hairs. Note that the instantaneous velocities ranged from 4.19 µm/sec to 9.96 µm/sec.

Figure 2

doi: https://doi.org/10.1371/journal.pone.0005961.g002