| Abstrakt: |
A study of the influence of microgravity and ethylene on the morphology and ultrastructural organization of mitochondria in root apex statocytes of 6-day old soybean seedlings that traveled on the Columbia space station on the STS-87 mission is presented. The seedlings were grown in hermetically sealed canisters in the presence of KMnO4 to neutralize ethylene. It is established that, independent of KMnO4 treatment, most of the mitochondria in the cells of the spaceflight seedlings were characterized by a round or oval shape and electronically transparent matrix, whereas in the seedlings in the ground controls the organelles were distinguished by a characteristic polymorphism, large dimensions, and higher electronic density of the matrix. One possible mechanism that could be responsible for the morphological and ultrastructural arrangement of the organelles in the process of adaptation of the seedlings to conditions of microgravity is discussed. [ABSTRACT FROM AUTHOR] |
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