Cortical actin filaments form rapidly during photopolarization and are required for the development of calcium gradients in Pelvetia compressa zygotes.

@article{Pu2000CorticalAF,
  title={Cortical actin filaments form rapidly during photopolarization and are required for the development of calcium gradients in Pelvetia compressa zygotes.},
  author={Rongsun Pu and Mietek Wozniak and Kenneth R. Robinson},
  journal={Developmental biology},
  year={2000},
  volume={222 2},
  pages={440-9}
}
Previous research has shown that cortical gradients of cytosolic Ca(2+) are formed during the photopolarization of Pelvetia compressa zygotes, with elevated Ca(2+) on the shaded hemisphere that will become the site of rhizoid germination. We report here that the marine sponge toxin, latrunculin B, which blocks photopolarization at nanomolar concentrations, inhibited the formation of the light-driven Ca(2+) gradients. Using low concentrations of microinjected fluorescent phalloidin as a tracer… CONTINUE READING

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