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Effect of 2-chloroethyltrimethyl ammonium chloride on tuberization and endogenous GA3 in roots of potato cuttings

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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

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