Abstract
The aim of the present work was to determine the effects of exogenous polyamines (PAs) supplemented into a BM medium free of plant growth regulators (PGR), on the endogenous PAs, IAA and ABA contents and growth of A. angustifolia embryogenic cultures. The addition of PAs to the PGR-free BM medium, enhanced the growth of embryogenic cultures. PAs endogenous metabolism was significantly affected by exogenous PAs. PAs supplemented to a PGR-free BM medium, mainly Put and Spm, increased the endogenous IAA and ABA levels, showing a direct relationship -between PAs levels and ABA accumulation. These results direct new strategies to further improve A. angustifolia somatic embryogenesis, especially during the maturation phase, by culture medium manipulation using exogenous PAs.
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Abbreviations
- BM:
-
Culture medium of Gupta and Pullman (1991)
- FM:
-
Fresh mass
- PAs:
-
Polyamines
- PGR:
-
Plant growth regulators
- Put:
-
Putrescine
- Spd:
-
Spermidine
- Spm:
-
Spermine
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This research was carried out with financial support from the National Council for Scientific and Technological Development (CNPq) and the State of São Paulo Research Foundation (FAPESP).
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Steiner, N., Santa-Catarina, C., Silveira, V. et al. Polyamine effects on growth and endogenous hormones levels in Araucaria angustifolia embryogenic cultures. Plant Cell Tiss Organ Cult 89, 55–62 (2007). https://doi.org/10.1007/s11240-007-9216-5
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DOI: https://doi.org/10.1007/s11240-007-9216-5