The quantitative relationship between gibberellin A1 and internode growth in Pisum sativum L.

These results indicate that gibberellin A20 has negligible intrinsic activity and support the contention that GA1 is the only GA active per se in promoting stem growth in pea

T. J. Ingram; J. B. Reid; J. MacMillan

2004

Key concepts

Scholarcy highlights

  • The metabolism and growth-promoting activity of gibberellin A20 were compared in the internode-length genotypes of pea, na le and na Le
  • Gibberellin A29 and GA29-catabolite were the major metabolites of GA20 in the genotype na le
  • In each case a close linear relationship was observed between internode growth and the logarithm of GA8 levels
  • A similar relationship was found on comparing GA20 metabolism in the three genotypes led, le and Le
  • The former mutation results in a more severe dwarf phenotype than the le allele. These results indicate that GA20 has negligible intrinsic activity and support the contention that GA1 is the only GA active per se in promoting stem growth in pea
  • These results indicate that gibberellin A20 has negligible intrinsic activity and support the contention that GA1 is the only GA active per se in promoting stem growth in pea

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