Abstract
Cuttings of potato shoots treated with the plant growth retardant 2-chloroethyltrimethyl ammonium chloride (CCC) form tubers earlier and have less biologically-active gibberellin (GA)-like substances in the roots than control cuttings. The major GA-like substance in roots of potato cuttings was identified as GA3 by gas-chromatography-mass spectrometry (GC-MS). The content of GA3 in roots of control cuttings, estimated by GC-MS-selected ion monitoring (SIM) using [17, 17-2H]GA3 as a quantitative internal standard, was 38.8 ng per g fresh weight (fw), and in roots of CCC-treated cuttings, in which tuberization was promoted, was 0.6 ng per g fw. Gibberellin A1, GA8 and GA20 were also indicated as minor components of roots from both control and CCC-treated cuttings. The comparatively high GA3 content in roots of control cuttings might be the ‘root factor’ responsible for delaying tuberization in potato.
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Abbreviations
- CCC:
-
2-chloroethyltrimethyl ammonium chloride
- dw:
-
dry weight
- EtOAc:
-
ethyl acetate
- GA:
-
gibberellin
- GC-MS-SIM:
-
gas chromatography-mass spectrometry-selected ion monitoring
- HPLC:
-
high performance liquid chromatography
- IAA:
-
indole-3-acetic acid
- KRI:
-
Kovats' retention index
- MeOH:
-
methanol
- MeTMSi:
-
methyl ester trimethylsilyl ether
- NAA:
-
naphthalene acetic acid
- SD:
-
short day(s)
- 2,4-D:
-
2,4-dichlorophenoxy acetic acid
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Abdala, G., Guiñazú, M., Tizio, R. et al. Effect of 2-chloroethyltrimethyl ammonium chloride on tuberization and endogenous GA3 in roots of potato cuttings. Plant Growth Regul 17, 95–100 (1995). https://doi.org/10.1007/BF00024167
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DOI: https://doi.org/10.1007/BF00024167