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The Effect of Salinity on the Malic Dehydrogenase of Pea Roots

Overview
Journal Plant Physiol
Specialty Physiology
Date 1969 Jul 1
PMID 16657152
Citations 4
Authors
E Hason-Porath
A Poljakoff-Mayber
Affiliations
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Abstract

Effect of salinity on malate dehydrogenase activity was studied.Pea root tips contain 2 different malate dehydrogenases. One is located in the particulate, mitochondrial fraction, the other in the soluble, cytoplasmic fraction. Both can act when coupled with either NAD or NADP.Growing plants in Na(2)SO(4) salinated medium did not affect the pattern of the malate dehydrogenases in the root tips. Growing plants in NaCl salinated media resulted in the appearance of a new, third isoenzyme. This new isoenzyme was located in the cytoplasmic fraction.Salinity of both types, when present in growth medium, induced increases in the NADP coupled activity of the mitochondrial malate dehydrogenase. The NAD coupled activity, however, was depressed except in the cytoplasmic fraction of plants grown in media salinated with NaCl to 1 atmosphere. Addition of either of the salts to assay media of enzymes, isolated from plants grown in non salinated substrate, did not have any significant effect.

Citing Articles

[Effect of sodium chloride on respiration and the activity of malate dehydrogenase in some halophytes and glycophytes].

von Willert D Oecologia. 2017; 14(1-2):127-137.

PMID: 28308102 DOI: 10.1007/BF00344903.

Effect of growth in highly salinized media on the enzymes of the photosynthetic apparatus in pea seedlings.

Weimberg R Plant Physiol. 1975; 56(1):8-12.

PMID: 16659262 PMC: 541288. DOI: 10.1104/pp.56.1.8.

Salt responses of enzymes from species differing in salt tolerance.

Greenway H Plant Physiol. 1972; 49(2):256-9.

PMID: 16657936 PMC: 365940. DOI: 10.1104/pp.49.2.256.

Enzyme levels in pea seedlings grown on highly salinized media.

Weimberg R Plant Physiol. 1970; 46(3):466-70.

PMID: 16657488 PMC: 396617. DOI: 10.1104/pp.46.3.466.

References
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Kahane I, Poljakoff-Mayber A . Effect of substrate salinity on the ability for protein synthesis in pea roots. Plant Physiol. 1968; 43(7):1115-9. PMC: 1086980. DOI: 10.1104/pp.43.7.1115. View