In maize (Zea mays L., cv. Voronezhskaya-76) seedlings subjected to salinity, the values of indicators of stress response development (contents of proline and lactate, activity of peroxidase) were higher in the cells of mesophyll than in the bundle sheath. At short-term NaCl (150 mM) action, the main reactions of the total adaptation syndrome were located in the cell of mesophyll. At salinity, substantial rearrangements of the isoenzyme composition of the malate dehydrogenase (MDH) system main enzymes occurred, which determined cell energization, the synthesis of reducing equivalents, maintenance of the osmotic balance, and functioning of the Hatch-Slake cycle. The changes in some intermediate concentrations and MDH-system enzyme functioning occurring under stress conditions permit a suggestion that, in maize tissues subjected to salt stress, an additional metabolic pathway related to aspartate synthesis and transport is induced.
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oxidative pentosophosphate pathway
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Original Russian Text © A.T. Eprintsev, O.S. Fedorina, Yu.S. Bessmeltseva, 2011, published in Fiziologiya Rastenii, 2011, Vol. 58, No. 3, pp. 384–390.
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Eprintsev, A.T., Fedorina, O.S. & Bessmeltseva, Y.S. Response of the malate dehydrogenase system of maize mesophyll and bundle sheath to salt stress. Russ J Plant Physiol 58, 448 (2011). https://doi.org/10.1134/S102144371102004X
- Zea mays
- bundle sheath
- salt stress
- malate dehydrogenase enzyme system