Abstract
This paper describes, for the first time, de novo adventitious root formation from thin cell layers (TCLs) of Arabidopsis thaliana. The objective of the study was to determine the optimal hormonal and light conditions and the optimal exogenous Ca2+ concentration for obtaining adventitious rooting (AR) from A. thaliana TCLs and to identify the tissue(s) involved in the process. The results show that maximum AR was obtained with a single-phase method in the presence of 10 μM indole-3-butyric acid and 0.1 μM kinetin under continuous darkness for 30 days and with 0.6 mM exogenous CaCl2. The endodermis was the only tissue involved in root meristemoid formation. The role of Ca2+ in AR and the importance of using Arabidopsis TCLs in studies on the genetic/biochemical control of AR are discussed.
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Abbreviations
- AR :
-
Adventitious rooting
- CIM :
-
Callus-inducing medium
- Col-0 :
-
Columbia ecotype
- 2,4-D :
-
2,4-Dichlorophenoxyacetic acid
- HFM :
-
Hormone-free medium
- HM :
-
Medium with 10 μM IBA and 0.1 μM Kin
- IBA :
-
Indole-3-butyric acid
- Kin :
-
Kinetin
- LS :
-
Longitudinal section
- NAA :
-
α-Naphthaleneacetic acid
- RIM :
-
Root-inducing medium
- TCL :
-
Thin cell layer
- WS :
-
Wassilewskija ecotype
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Acknowledgements
This work was supported by Università La Sapienza (Rome, Italy), Progetto Ateneo, to M.M.A. The authors express their gratitude to Marisa Tomassi for support in standardizing the Arabidopsis TCL technique, and to Stefania Biondi for helpful discussions.
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Falasca, G., Zaghi, D., Possenti, M. et al. Adventitious root formation in Arabidopsis thaliana thin cell layers. Plant Cell Rep 23, 17–25 (2004). https://doi.org/10.1007/s00299-004-0801-3
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DOI: https://doi.org/10.1007/s00299-004-0801-3