Rootcap structure in wild type and in a starchless mutant of Arabidopsis.

@article{Sack1989RootcapSI,
  title={Rootcap structure in wild type and in a starchless mutant of Arabidopsis.},
  author={F. Sack and J. Kiss},
  journal={American journal of botany},
  year={1989},
  volume={76 3},
  pages={
          454-64
        }
}
  • F. Sack, J. Kiss
  • Published 1989
  • Biology, Medicine
  • American journal of botany
Rootcaps of the wild type (WT) and of a starchless, gravitropic mutant (TC7) of Arabidopsis thaliana L. were examined by electron microscopy to identify cellular polarities with respect to gravity. In columella cells, nuclei are located proximally, and the nuclear envelope is continuous with endoplasmic reticulum (ER) that is in turn connected to nearby plasmodesmata. Impregnation of ER with osmium ferricyanide revealed numerous contacts between columella plastids and ER in both genotypes. ER… Expand
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TLDR
Based on magnified electron micrographs of normal and inverted statocytes a morphometrical analysis of the distribution and redistribution of amyloplasts, nuclei, mitochondria, vacuoles and ER was made, and the only significant difference was found in the redistribution ofAmyloplast between aux-1 and the gravitropical normal types. Expand
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TLDR
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  • Biology, Medicine
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TLDR
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This appears to be the first report of cytoplasmic streaming in the presumptive statocytes of roots, and the kinetics of gravity-induced amyloplast sedimentation were comparable to those calculated from experiments using fixed material. Expand
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