Endogenous gibberellins in foliage of tomato (Lycopersicon esculentum)

José M. Grünzweig, Haim D. Rabinowitch*, Jaacov Katan, Maria Wodner, Yossi Ben-Tal

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Endogenous gibberellins (GAs) from the leaves and shoot tips of 13-14 days old tomato transplants (Lycopersicon esculentum Mill.) grown in solarised or non-solarised soil were analysed by GC-mass spectrometry. Full- scan mass spectra and Kovats retention indices revealed in plants from both soils the presence of GA1, GA3, GA3-isolactone, GA4, GA8, GA19, GA20, GA29, GA34 and GA51. Further analyses by GC-SIM indicated the presence of GA44 and GA53 in the tomato foliage. An isotope-dilution analysis revealed that most of the GA3-isolactone was a methodological artefact. Our results provide the first conclusive identification of most members of the early-13-hydroxylation biosynthetic pathway in vegetative tomato tissues. In addition, the presence of GA4, GA34 and GA51 which were not reported previously in the tomato, indicates that the early-non- 3,13-hydroxylation biosynthetic pathway is a so active. Three potentially active GAs GA1, GA3 and GA4, were identified in tomato foliage, all of which may play an important role in regulating growth in this species.

Original languageAmerican English
Pages (from-to)811-815
Number of pages5
Issue number5
StatePublished - Nov 1997


  • Gibberellins
  • Identification
  • Isotope-dilution analysis
  • Lycopersicon esculentum
  • Soil solarisation
  • Solanaceae
  • Tomato


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