| Title: | An allelopathic substance in red pine needles (Pinus densiflora) |
| Author(s): | Kato-Noguchi H; Fushimi Y; Shigemori H; |
| Address: | "Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, Miki, Kagawa, Japan. hisashi@ag.kagawa-u.ac.jp" |
| DOI: | 10.1016/j.jplph.2008.06.012 |
| ISSN/ISBN: | 1618-1328 (Electronic) 0176-1617 (Linking) |
| Abstract: | "Aqueous methanol extracts of red pine (Pinus densiflora) needles inhibited the growth of roots and shoots of cress (Lepidium sativum), lettuce (Lactuca sativa), alfalfa (Medicago sativa), ryegrass (Lolium multiflorum), timothy (Pheleum pratense), Digitaria sanguinalis and Echinochloa crus-galli. Increasing the extract concentration increased inhibition, suggesting that the pine needles may have growth inhibitory substances and possess allelopathic potential. The aqueous methanol extract of the pine needles was purified, and a main inhibitory substance was isolated and determined by spectral data as 9alpha,13beta-epidioxyabeit-8(14)en-18-oic acid. This substance inhibited root and shoot growth of cress and Echinochloa crus-galli seedlings at concentrations greater than 0.1 mM. The endogenous concentration of the substance was 0.13 mmol/kg pine needle. These results suggest that 9alpha,13beta-epidioxyabeit-8(14)en-18-oic acid may contribute to the growth inhibitory effect of the pine needles and may play an important role in the allelopathy of red pine" |
| Keywords: | Echinochloa/drug effects/growth & development Lepidium sativum/drug effects/growth & development Pheromones/chemistry/*isolation & purification/pharmacology Pinus/*chemistry Plant Extracts Plant Leaves/*chemistry Plant Roots/drug effects/growth & developm; |
| Notes: | "MedlineKato-Noguchi, Hisashi Fushimi, Yoshiko Shigemori, Hideyuki eng Germany 2008/08/30 J Plant Physiol. 2009 Mar 1; 166(4):442-6. doi: 10.1016/j.jplph.2008.06.012. Epub 2008 Aug 27" |
