Accumulation of cytosolic glyceraldehyde-3-phosphate dehydrogenase RNA under biological stress conditions and elicitor treatments in potato

• Published in: Plant molecular biology 1996-03, Vol.30 (5), p.961-972
• Main Authors: Laxalt, A.M. (Universidad Nacional de Mar del Plata (Argentina). Facultad de Ciencias Exactas y Naturales, Inst. de Investigaciones Biologicas IIB), cassia, R.O, Sanllorenti, P.M, Madrid, E.A, Andreu, A.B, Daleo, G.R, Conde, R.D, Lamattina, L
• Format: Article
• Language: English
• Subjects: Amino Acid Sequence; Base Sequence; Cloning, Molecular; Cytosol - enzymology; DNA, Complementary; Eicosapentaenoic Acid - pharmacology; ESTRES; EXPRESION GENICA; EXPRESSION DES GENES; GENE EXPRESSION; Gene Expression Regulation, Enzymologic; Gene Expression Regulation, Plant; Glyceraldehyde-3-Phosphate Dehydrogenases - genetics; Molecular Sequence Data; OXIDOREDUCTASES; OXIDORREDUCTASAS; OXYDOREDUCTASE; PHYTOPHTHORA INFESTANS; Plant Leaves - enzymology; Polymerase Chain Reaction; RNA, Messenger - metabolism; Sequence Homology, Amino Acid; SOLANUM TUBEROSUM; Solanum tuberosum - drug effects; Solanum tuberosum - enzymology; Solanum tuberosum - physiology; STRESS; Transcriptional Activation
• ISSN: 0167-4412; 1573-5028
• DOI: 10.1007/BF00020807

Plants respond to pathogen infection and environmental stress by regulating the coordinate expression of many stress-related genes. In plants, the expression of the glycolytic enzyme glyceraldehyde-3-phosphate dehydrogenase (GAPDH) is induced under environmental stress. This work was aimed at investigating whither the expression pattern of cytosolic GAPDH is also modulated upon infection of potato plants (Solanum tuberosum L.) with the late blight fungal agent Phytophthora infestans. Northern blot analysis showed the accumulation of the GAPDH gene transcripts in leaves and stems of inoculated potato plants. When tuber discs were treated with eicosapentaenoic acid (EPA), an elicitor found in P. infestans, GAPDH gene transcripts level increased. The increase was parallel to that of the hydroxymethyl glutharyl coenzyme A reductase (HMGR), an enzyme involved in pathogen defense reactions. Glucans obtained from P. infestans cell wall acts synergistically with EPA on GAPDH and HMGR gene induction. Salicylic acid, an endogenous signal for inducing systemic acquired resistance, was also effective in stimulating the GAPDH transcript accumulation in potato leaves. These experiments suggest that related multi-component factors, which are part of both primary and secondary metabolism, are probably regulated by similar signal transduction pathways when they are induced under biotic or abiotic stress conditions.