Abstract
Qualitative analysis by gas chromatography-mass spectrometry (GC-MS) of the auxins present in the root, cotyledons and epicotyl of 3-dold etiolated pea (Pisum sativum L., cv. Alaska) seedlings has shown that all three organs contain phenylacetic acid (PAA), 3-indoleacetic acid (IAA) and 4-chloro-3-indoleacetic acid (4Cl-IAA). In addition, 3-indolepropionic acid (IPA) was present in the root and 3-indolebutyric acid (IBA) was detected in both root and epicotyl. Phenylacetic acid, IAA and IPA were measured quantitatively in the three organs by GC-MS-single ion monitoring, using deuterated internal standards. Levels of IAA were found to range from 13 to 115 pmol g-1 FW, while amounts of PAA were considerably higher (347–451 pmol g-1 FW) and the level of IPA was quite low (5 pmol g-1 FW). On a molar basis the PAA:IAA ratio in the whole seedling was approx. 15:1.
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Abbreviations
- IAA:
-
3-indoleacetic acid
- 4Cl-IAA:
-
4-chloro-3-indoleacetic acid
- IBA:
-
3-indolebutyric acid
- IPA:
-
3-indolepropionic acid
- PAA:
-
phenylacetic acid
- GC-MS:
-
gas chromatography-mass spectrometry
- HPLC:
-
high-performance liquid chromatography
- PFB:
-
pentafluorobenzyl ester
- PFBBr:
-
pentafluorobenzyl bromide
- SIM:
-
single-ion monitoring
- TMSI:
-
trimethylsilyl ester
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Schneider, E.A., Kazakoff, C.W. & Wightman, F. Gas chromatography-mass spectrometry evidence for several endogenous auxins in pea seedling organs. Planta 165, 232–241 (1985). https://doi.org/10.1007/BF00395046
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DOI: https://doi.org/10.1007/BF00395046