Temperature regulates tuber-inducing lipoxygenase-derived metabolites in potato ( Solanum tuberosum)

Temperature is one of the major environmental factors affecting potato tuberization. It has been suggested that lipoxygenase (LOX) mediates between temperature and tuber induction. In this study, the contents of the LOX-derived metabolites hydroperoxylinolenic acid (HPOT), jasmonic acid (JA), tubero...

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Bibliographic Details
Published in:Journal of plant physiology 2008-02, Vol.165 (2), p.233-238
Main Authors: Nam, Kyong-Hee, Kong, Fanjiang, Matsuura, Hideyuki, Takahashi, Kosaku, Nabeta, Kensuke, Yoshihara, Teruhiko
Format: Article
Language:English
Subjects:
Biological and medical sciences
cold stress
Enzyme Induction
Fundamental and applied biological sciences. Psychology
heat stress
Hydroperoxylinolenic acid
Jasmonic acid
lipoxygenase
Lipoxygenase - biosynthesis
Lipoxygenase - metabolism
Metabolism
Photosynthesis, respiration. Anabolism, catabolism
physiological response
Plant physiology and development
plant response
plant stress
potatoes
Solanum tuberosum
Solanum tuberosum - enzymology
Temperature
Tuberonic acid
Tuberonic acid glucoside
tubers
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Summary:Temperature is one of the major environmental factors affecting potato tuberization. It has been suggested that lipoxygenase (LOX) mediates between temperature and tuber induction. In this study, the contents of the LOX-derived metabolites hydroperoxylinolenic acid (HPOT), jasmonic acid (JA), tuberonic acid (TA) and tuberonic acid glucoside (TAG) were analyzed in leaves of potatoes growing at different temperatures. At low, tuber-inducing temperature, endogenous levels of JA, TA and TAG rise, indicating their crucial role in tuber induction. The concentration of 13( S)-HPOT seems not to be directly affected by temperature. Instead, the molecule has only a short half-life in leaves and is readily metabolized.
ISSN:0176-1617
1618-1328
DOI:10.1016/j.jplph.2007.04.003