phenolic, 3,4-dihydroxybenzoic acid, is an endogenous regulator of rooting in Protea cynaroides

Analysis of stem extracts identified large quantities of 3,4-dihydroxybenzoic acid and other similar phenolics. The exogenous application of 3,4-dihydroxybenzoic acid on Protea cynaroides explants in vitro significantly increased the root mass at 100 mg l-¹, but not at lower concentrations, while ro...

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Published inPlant growth regulation Vol. 52; no. 3; pp. 207 - 215
Main Authors Wu, H. C, du Toit, E. S, Reinhardt, C. F, Rimando, A. M, van der Kooy, F, Meyer, J. J. M
Format Journal Article
LanguageEnglish
Published Dordrecht Dordrecht : Kluwer Academic Publishers 01.07.2007
Springer Nature B.V
Subjects
Acids
Cuttings
Dihydroxybenzoic acid
Explants
High-performance liquid chromatography
King Protea
Liquid chromatography
Phenolics
Phenols
Plant propagation
Propagation
protocatechuic acid
Rooting
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Summary:Analysis of stem extracts identified large quantities of 3,4-dihydroxybenzoic acid and other similar phenolics. The exogenous application of 3,4-dihydroxybenzoic acid on Protea cynaroides explants in vitro significantly increased the root mass at 100 mg l-¹, but not at lower concentrations, while root inhibition was observed at 500 mg l-¹. HPLC analysis of cuttings during vegetative propagation showed a considerable increase in 3,4-dihydroxybenzoic acid levels from initial planting to when root formation took place, indicating for the first time that 3,4-dihydroxybenzoic acid may be an important phenolic compound in regulating root formation in P. cynaroides cuttings. HPLC analysis also identified caffeic, ferulic, gallic and salicylic acids in the cuttings.
Bibliography:http://dx.doi.org/10.1007/s10725-007-9191-1
ISSN:0167-6903
1573-5087
DOI:10.1007/s10725-007-9191-1