The role of gibberellins A 1 and A 3 in fruit growth of Pisum sativum L. and the identification of gibberellins A 4 and A 7 in young seeds

Gibberellins A1 and A3 are the major physiologically active gibberellins present in young fruit of pea

Maria J. Rodrigo

2002

Scholarcy highlights

  • Gibberellins A1 and A3 are the major physiologically active gibberellins present in young fruit of pea
  • The GA1 content is maximal in seeds and pods at 6 d after anthesis, the time of highest growth-rate of the pod, whereas gibberellic acid, which is present at high levels in seeds 4–8 d after anthesis, has very low abundance in pods
  • Gibberellins A19, A20 and A29 are most concentrated in seeds at, or shortly after, anthesis and their abundance declines rapidly with development, concomitant with the sharp increase in GA1 and GA3 content
  • There was a linear relationship between GA1 content and pod weight up to about 2 ng ·−1, whereas no such correlation existed for GA3 content
  • Most of the GA1, GA8, GA19, GA20 and GA29 was present in the testa, whereas GA3 was distributed between testa and endosperm and GA4 was localised mainly in the endosperm
  • GA1 and GA3 were not obtained as products and it is unlikely that they are formed via the early 13-hydroxylation pathway.gibberellin A12, applied to the inside surface of pods in situ, was metabolised to GA19, GA20, GA29, GA29-catabolite, GA81 and GA97, but GA1 was not detected
  • M., García-Martínez, J., Santes, C. et al The role of gibberellins A1 and A3 in fruit growth of Pisum sativum L. and the identification of gibberellins A4 and A7 in young seeds

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