Acetaldehyde stimulation of net gluconeogenic carbon movement from applied malic acid in tomato fruit pericarp tissue

Journal Article · Fri Mar 01 00:00:00 EST 1991 · Plant Physiology; (United States)

DOI:https://doi.org/10.1104/pp.95.3.954· OSTI ID:5930880

Halinska, A; Frenkel, C ^[1]

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1. Rutgers, The State Univ. of New Jersey, New Brunswick (United States)

Applied acetaldehyde is known to lead to sugar accumulation in fruit including tomatoes (Lycopersicon esculentum) presumably due to stimulation of gluconeogenesis. This conjecture was examined using tomato fruit pericarp discs as a test system and applied l-(U-{sup 14}C)malic acid as the source for gluconeogenic carbon mobilization. Results indicate that malic and perhaps other organic acids are carbon sources for gluconeogenesis occurring normally in ripening tomatoes. The process is stimulated by acetaldehyde apparently by attenuating the fructose-2,6-biphosphate levels. The mode of the acetaldehyde regulation of fructose-2,6-biphosphate metabolism awaits clarification.

• OSTI ID: 5930880
• Journal Information: Plant Physiology; (United States), Vol. 95:3; ISSN 0032-0889
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
ACETALDEHYDE
BIOCHEMICAL REACTION KINETICS
TOMATOES
METABOLISM
CARBON 14 COMPOUNDS
PLANT TISSUES
RESPIRATION
TRACER TECHNIQUES
ALDEHYDES
BODY
CARBON COMPOUNDS
FOOD
FRUITS
ISOTOPE APPLICATIONS
KINETICS
LABELLED COMPOUNDS
ORGANIC COMPOUNDS
REACTION KINETICS
TISSUES
551001* - Physiological Systems- Tracer Techniques