The Effect of Chilling Maize Shoots and Roots on the Electric Potential, Composition of Fatty Acids and the ATPase Activity in the Non-chilled Organs of Seedlings.
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| Title: | The Effect of Chilling Maize Shoots and Roots on the Electric Potential, Composition of Fatty Acids and the ATPase Activity in the Non-chilled Organs of Seedlings. |
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| Authors: | Filek, M.1 (AUTHOR), Koscielniak, J.2 (AUTHOR) |
| Source: | Journal of Agronomy & Crop Science. Dec1996, Vol. 177 Issue 4, p261-267. 7p. |
| Subjects: | Hybrid corn, Plant shoots, Plant roots, Seedlings, Fatty acids, Adenosine triphosphatase, Low temperatures, Microsomes |
| Abstract: | The effect of separate chilling (5 °C for 2 and 4 days) on the shoots and roots of two maize hybrid seedlings on the electric potential, the composition of fatty acids and the ATPase activity in the microsomes of non-chilled leaves and roots (20 °C) was investigated. It has been found that the low temperatures induced on the non-chilled organs gave similar changes to organs exposed to a reduced temperature. The changes consisted of a parallel depolarization of leaf and root membranes and similarly a decrease in the ATPase activity as well as changes in the unsaturation of the membranes' fatty acids. The reduction of the acid content 18:2 was particularly significant, which in the leaf microsomes correlated with a drop in the ATPase activity. The similarity between the reactions of the chilled and non-chilled parts of the plant gives evidence of a 'communication' between the organs which may facilitate a coordinated reaction of the entire organism to stress. The background for these phenomena could be the action potential of the chilled parts of seedlings which, in the non-chilled parts, might produce changes in the structure of biomembranes and in the activity of enzymes. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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