Plant growth regulator and graft control of axillary bud formation and development in theTO-2 mutant tomato
✍ Scribed by S. Mapelli; J. M. Kinet
- Publisher
- Springer Netherlands
- Year
- 1992
- Tongue
- English
- Weight
- 416 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0167-6903
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✦ Synopsis
The torosa-2 tomato mutant is characterized by a strong inhibition of release of axillary shoots, that is not under the control of the main apex and IAA . Microscopic examination indicated that about 70% of leaf axils do not have axillary buds . Of the growth regulators tested, gibberellic acid and cytokinins were able to modify the to-2 phenotype : increasing bud number (GA, treated) and developing shoots (both substances) . Sequential application of growth regulators demonstrated that bud production was only affected by treatments given between sowing time and 32 days after germination . Grafting experiments indicated that endogenous root factors have no essential role in the lateral branching of the genotypes investigated . The control of axillary bud differentiation and the branching pattern in the to-2 appears to be dependent of a complex mechanism involving gibberellins and cytokinins .