Abstract
Key message
There are tissues distributed throughout the plant that have a higher morphogenic capacity than others in the plant, and these could perhaps solve recalcitrance problems.
Abstract
For many conifer species, regeneration by organogenesis or somatic embryogenesis (SE) is still difficult and is often restricted to explants taken from juvenile donors. This review is based on the premise that there are tissues in the plant that are not normally used as explant, mostly because excising them in a viable state is difficult. Nevertheless, in cases where recalcitrance is a major problem, it may be worthwhile to pay closer attention to these tissues. Recalcitrance is a general problem, and discussion of it requires examples from the general literature. However, to restrict the scope of this review, preference will be given to conifer examples whenever possible.
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Abbreviations
- LRM:
-
Lateral root meristem
- OC:
-
Organizing center
- Pluripotent:
-
Capable of forming one or more organs
- SAM:
-
Shoot apical meristem
- SE:
-
Somatic embryogenesis
- SEs:
-
Somatic embryos
- Totipotent:
-
Capable of forming an embryo from a somatic cell that is similar to a zygotic embryo
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I wish to thank Dr. Krystyna Klimaszewska and Dr. Patrick von Aderkas for their review of the manuscript.
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Communicated by M. Buckeridge.
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Bonga, J.M. Can explant choice help resolve recalcitrance problems in in vitro propagation, a problem still acute especially for adult conifers?. Trees 31, 781–789 (2017). https://doi.org/10.1007/s00468-016-1509-z
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DOI: https://doi.org/10.1007/s00468-016-1509-z