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

Journal Article · Fri Mar 01 04:00:00 EST 1991 · Plant Physiology; (United States)

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

Halinska, A; Frenkel, C ^[1]

---

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

Related Subjects

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