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Effect of DCPA on Ultrastructure of Foxtail Millet Cells

Published online by Cambridge University Press:  12 June 2017

C. T. Chang  and
Don Smith
C. T. Chang
Affiliation:
Dep. of Biol. Sci., North Texas State Univ., Denton, Texas 76203
Don Smith
Affiliation:
Dep. of Biol. Sci., North Texas State Univ., Denton, Texas 76203
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Abstract

Shoot apices of 7-day old foxtail millet (Setaria italica (L) Beauv.) seedlings treated with 2 and 20 mg/L of dimethyltetrachloroterephthalate (DCPA) were examined under the electron microscope. Cell division is interrupted. The nucleus and nucleolus do not disintegrate and chromosomes do not differentiate. Instead, giant nuclei and giant nucleoli occupy most of the cell volume in the meristematic regions. Several nucleolar caps form on the giant nucleolus; and in the advanced stages, they separate and are encircled by a nuclear membrane to form multiple nuclei. Other organelles are also affected. Cristae and thylakoid membranes of mitochondria and chloroplasts degenerate and multiple vacuoles form. Cell walls are markedly more osmophilic after DCPA treatment. Treated cells are less turgid than controls.

Type
Research Article
Information
Weed Science , Volume 20 , Issue 3 , May 1972 , pp. 220 - 225
Copyright
Copyright © Weed Science Society of America 

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