Ethylene-enhanced catabolism of ( sup 14 C)indole-3-acetic acid to indole-3-carboxylic acid in citrus leaf tissues. [Citrus sinensis]

Journal Article · Mon Jan 01 00:00:00 EST 1990 · Plant Physiology; (USA)

DOI:https://doi.org/10.1104/pp.92.1.54· OSTI ID:7192047

Sagee, O; Riov, J; Goren, J ^[1]

---

1. Hebrew Univ. of Jerusalem, Rehovot (Israel)

Exogenous ({sup 14}C)indole-3-acetic acid (IAA) is conjugated in citrus (Citrus sinensis) leaf tissues to one major substance which has been identified as indole-3-acetylaspartic acid (IAAsp). Ethylene pretreatment enhanced the catabolism of ({sup 14}C)IAA to indole-3-carboxylic acid (ICA), which accumulated as glucose esters (ICGlu). Increased formation of ICGlu by ethylene was accompanied by a concomitant decrease in IAAsp formation. IAAsp and ICGlu were identified by combined gas chromatography-mass spectrometry. Formation of ICGlu was dependent on the concentration of ethylene and the duration of the ethylene pretreatment. It is suggested that the catabolism of IAA to ICA may be one of the mechanisms by which ethylene endogenous IAA levels.

• OSTI ID: 7192047
• Journal Information: Plant Physiology; (USA), Vol. 92:1; ISSN 0032-0889
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
CITRUS
PHYSIOLOGY
ETHYLENE
BIOCHEMICAL REACTION KINETICS
PLANT GROWTH REGULATORS
CATABOLISM
BIOLOGICAL PATHWAYS
CARBON 14 COMPOUNDS
TRACER TECHNIQUES
ALKENES
HYDROCARBONS
ISOTOPE APPLICATIONS
KINETICS
LABELLED COMPOUNDS
MAGNOLIOPHYTA
MAGNOLIOPSIDA
METABOLISM
ORGANIC COMPOUNDS
PLANTS
REACTION KINETICS
551001* - Physiological Systems- Tracer Techniques