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Literature DB >> 12226193

Gibberellin Metabolism in Maize (The Stepwise Conversion of Gibberellin A12-Aldehyde to Gibberellin A20.

M. Kobayashi¹, C. R. Spray, B. O. Phinney, P. Gaskin, J. MacMillan.

Abstract

The stepwise metabolism of gibberellin A12-aldehyde (GA12-aldehyde) to GA20 is demonstrated from seedling shoots of maize (Zea mays L.). The labeled substrates [13C,3H]GA12-aldehyde, [13C,3H]GA12, [14C4]GA53, [14C4/2H2]GA44, and [14C4/2H2]GA19 were fed individually to dwarf-5 vegetative shoots. Both [13C,3H]GA12-aldehyde and [13C,3H]GA12 were also added individually to normal shoots. The labeled metabolites were identified by full-scan gas chromatography-mass spectrometry and Kovats retention indices. GA12-aldehyde was metabolized to GA53-aldehyde, GA12, GA53, GA44, and GA19; GA12 was metabolized to 2[beta]-hydroxy-GA12, GA53, 2[beta]-hydroxyGA53, GA44, 2[beta]-hydroxyGA44, and GA19; GA53 was metabolized to GA44, GA19, GA20, and GA1; GA44 was metabolized to GA19; and GA19 was metabolized to GA20. These results, together with previously published data from this laboratory, document the most completely defined gibberellin pathway for the vegetative tissues of higher plants.

Entities: Chemical Gene Species

Year: 1996 PMID： 12226193 PMCID： PMC157734 DOI： 10.1104/pp.110.2.413

Source DB: PubMed Journal: Plant Physiol ISSN： 0032-0889 Impact factor: 8.340

6 in total

1. The dominant non-gibberellin-responding dwarf mutant (D8) of maize accumulates native gibberellins.

Authors: S Fujioka; H Yamane; C R Spray; M Katsumi; B O Phinney; P Gaskin; J Macmillan; N Takahashi
Journal: Proc Natl Acad Sci U S A Date: 1988-12 Impact factor: 11.205

2. Identification of Gibberellins in Spinach and Effects of Light and Darkness on their Levels.

Authors: M Talon; J A Zeevaart; D A Gage
Journal: Plant Physiol Date: 1991-12 Impact factor: 8.340

3. Metabolism of ent-Kaurene to Gibberellin A(12)-Aldehyde in Young Shoots of Normal Maize.

Authors: Y Suzuki; H Yamane; C R Spray; P Gaskin; J Macmillan; B O Phinney
Journal: Plant Physiol Date: 1992-02 Impact factor: 8.340

4. Gibberellin A(3) Is Biosynthesized from Gibberellin A(20) via Gibberellin A(5) in Shoots of Zea mays L.

Authors: S Fujioka; H Yamane; C R Spray; B O Phinney; P Gaskin; J Macmillan; N Takahashi
Journal: Plant Physiol Date: 1990-09 Impact factor: 8.340

5. Metabolism and Biological Activity of Gibberellin A4 in Vegetative Shoots of Zea mays, Oryza sativa, and Arabidopsis thaliana.

Authors: M. Kobayashi; P. Gaskin; C. R. Spray; Y. Suzuki; B. O. Phinney; J. MacMillan
Journal: Plant Physiol Date: 1993-06 Impact factor: 8.340

6. Gibberellin A1 is required for stem elongation in spinach.

Authors: J A Zeevaart; D A Gage; M Talon
Journal: Proc Natl Acad Sci U S A Date: 1993-08-01 Impact factor: 11.205

6 in total

5 in total

Gibberellin Metabolism in Maize (The Stepwise Conversion of Gibberellin A12-Aldehyde to Gibberellin A20.

1. The dominant non-gibberellin-responding dwarf mutant (D8) of maize accumulates native gibberellins.

2. Identification of Gibberellins in Spinach and Effects of Light and Darkness on their Levels.

3. Metabolism of ent-Kaurene to Gibberellin A(12)-Aldehyde in Young Shoots of Normal Maize.

4. Gibberellin A(3) Is Biosynthesized from Gibberellin A(20) via Gibberellin A(5) in Shoots of Zea mays L.

5. Metabolism and Biological Activity of Gibberellin A4 in Vegetative Shoots of Zea mays, Oryza sativa, and Arabidopsis thaliana.

6. Gibberellin A1 is required for stem elongation in spinach.

1. The Five "Classical" Plant Hormones.

2. Gibberellin Biosynthesis in Maize. Metabolic Studies with GA(15), GA(24), GA(25), GA(7), and 2,3-Dehydro-GA(9).

3. The dwarf-1 (dt) Mutant of Zea mays blocks three steps in the gibberellin-biosynthetic pathway.

4. Auxin from the developing inflorescence is required for the biosynthesis of active gibberellins in barley stems.

5. He-Ne laser accelerates seed germination by modulating growth hormones and reprogramming metabolism in brinjal.