biologia plantarum

International journal on Plant Life established by Bohumil Němec in 1959

Biologia plantarum 29:290, 1987 | DOI: 10.1007/BF02892792

The development of structural changes in epidermal cells of Maize Roots During Water Stress

Milada Čiamporová1
1 Institute of Experimental Biology and Ecology, Slovak Academy of Sciences, Bratislava, Czechoslovakia

Ultrastructural changes following increasing periods of water stress induced by means of polyethylene glycol 4000 (from 5 min to 18 h) were investigated in young epidermal cells of the primary roots ofZea mays. The sensitivity of the individual cell components to water stress was considered according to the time sequence in which their alterations appeared.
Endoplasmic reticulum (ER) and mitochondria proved to be the most sensitive cell components, their structure changing after 5 min of water stress. By 8 h of stress, the condensation of nuclear chromatin in some cells was apparent, preceding polyribosome degradation but not all the other changes of the stressed cells. Similar types of structural alterations appeared slightly earlier in the more differentiated epidermal cells. The rapid changes in the structure of ER and mitochondria coincided with the rapid decrease of water potential of the root tips and the immediate cessation of the root growth.

Received: November 14, 1986; Accepted: January 14, 1987; Published: July 1, 1987  Show citation

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Čiamporová, M. (1987). The development of structural changes in epidermal cells of Maize Roots During Water Stress. Biologia plantarum, 29(4), 290. doi: 10.1007/BF02892792
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