Studies of the functional activity of mitochondria and cell ultrastructure of the coleoptile in wheat, Agropyron and their hybrids (incomplete amphidiploids) during decreasing temperature

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
N B KhristolyubovaT K Usova


The structure of the mitochondria and endoplasmic reticulum in the coleoptile of plants (Triticum aestivum var. Lutescens 329, Agropyron glaucum, Triticum × Agropyron 56-chromosome hybrids, incomplete amphidiploids, TAH, containing 42 wheat chromosomes and 14 chromosomes of genomes D or X of Agropyron), which differ in winterhardiness, was studied after exposure to 0 ° and -4 °C for periods varying from 10 min to 4 days. The functional activity of mitochondria isolated from 3 day old seedlings was also investigated in these cereals. The cells of Triticum and Agropyron seedlings grown at 23 °C were shown to differ in mitochondrial structure. In the cells of TAH both kinds of mitochondria were found.On day 4 of exposure to -4 °C, the mitochondria of Agropyron cells were not changed; the endoplasmic reticulum formed complex closed cavities. Under similar conditions most wheat mitochondria were destroyed and in the rest no cristae were observed.Morphometric analysis indicated that the volume of such mitochondria increases by two times, while the surface area of the internal membranes and cristae decreases by 1.54 times. In such cells, the endoplasmic reticulum is represented only by membranes of the smooth type. The structure of th...Continue Reading


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Related Concepts

Endoplasmic Reticulum
Wheat (Dietary)
Morphometric Analysis

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