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- Title
Inhibitory effects of bark chemicals of host Ipomoea murucoides on seed germination of epiphyte Tillandsia recurvata.
- Authors
VALENCIA-DÍAZ, S.; FLORES-PALACIOS, A.; RODRÍGUEZ-LÓPEZ, V.; JIMÉNEZ-APARICIO, A. R.
- Abstract
This study determined the chemical contents of dichloromethane bark extract of I. murucoides that inhibited the seed germination in T. recurvata. Dichloromethane bark extract was subjected to two consecutive fractionations. The inhibition (%) of T. recurvata seed germination was determined for each resulting fractions. Using gas chromatographymass spectrometry (GCMS), the components of primary fraction with the highest inhibition were analyzed, as well as secondary fractions derived from this primary fraction. The primary fraction G (CH2Cl2:AcOEt (v/v 1:1)) had the highest inhibitory effects on T. recurvata seed germination. The secondary fractions G1 (Hex:CH2Cl2 (mean concentration v/v 3:7)), G5 (CH2:Cl2:AcOEt (v/v 7:3)) and G7 (MeOH) were most inhibitory. Among the compounds of active primary fraction and secondary fractions G5 and G7, n-hexadecanoic acid were identified as compounds with possible allelopathic activity. However, these were not present in secondary fraction G1, it had the allelochemical 3,7,11,15-tetramethyl-2-hexadecen-1-ol. Results indicated that there were three active secondary fractions with different chemical composition but none of these inhibited the seed germination of T. recurvata. The inhibitory effects of dichloromethane extract of I. murucoides tends to diminish with fractionation, it is possible that the activity of components may be greater when they act together than when they act individually, However, further research is needed in this direction.
- Subjects
DICHLOROMETHANE; GERMINATION; TETRAMETHYL compounds; IPOMOEA; CHEMICAL terrorism; ALLELOCHEMICALS; ALLELOPATHIC agents
- Publication
Allelopathy Journal, 2013, Vol 32, Issue 1, p91
- ISSN
0971-4693
- Publication type
Article