Abstract
In spite of the importance attained by somatic embryogenesis and of the many studies that have been conducted on this developmental process, there are still many aspects that are not fully understood. Among those features, the involvement of plant hormones and plant growth regulators on deTermining the conversion of somatic onto embryogenic tissues, and on allowing progression and maturation of somatic embryos, are far away from being completely comprehended. Part of these difficulties relies on the frequent appearance of contradictory results when studying the effect of a particular stimulus over a specific stage in somatic embryogenesis. Recent progress achieved on understanding the interaction between exogenously added plant growth regulators over the concentration of endogenous hormones, together with the involvement of sensitivity of the tissues to particular hormone groups, might help clarifying the occurrence of divergent patterns in somatic embryogenesis, and in tissue culture in general. The aspects described above, emphasizing on the effect of the concentration of plant hormones and of the addition of plant growth regulators during the different phases of somatic embryogenesis, will be reviewed in this paper. Citations will be limited to review articles as much as possible and to individual articles only in those cases in which very specific or recent information is presented.
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Abbreviations
- 2,4-D:
-
2,4-dichlorophenoxyacetic acid
- ABA:
-
abscisic acid
- CK:
-
cytokinin
- E:
-
embryogenic
- (GA3):
-
gibberellic acid
- GA:
-
gibberellin
- IAA:
-
indole-3-acetic acid
- BAP:
-
N6-benzylaminopurine
- iP:
-
N6(Δ2-isopentenyl) adenine
- iPA:
-
N6(Δ2-isopentenyl) adenosine
- NAA:
-
naphthalene acetic acid
- NE:
-
non-embryogenic
- PGR:
-
plant growth regulator
- SE:
-
somatic embryogenesis
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Jiménez, V. Involvement of Plant Hormones and Plant Growth Regulators on in vitro Somatic Embryogenesis. Plant Growth Regul 47, 91–110 (2005). https://doi.org/10.1007/s10725-005-3478-x
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DOI: https://doi.org/10.1007/s10725-005-3478-x