Weed Research (2009) 49, 621-627

H. Kato-Noguchi, K. Kobayashi and H. Shigemori (2009)
Allelopathy of the moss Hypnum plumaeforme by the production of momilactone A and B
Weed Research 49 (6), 621-627
Abstract: Extract of soil under colonies of Hypnum plumaeforme inhibited the growth of roots and shoots of cress, lettuce, lucerne, ryegrass, timothy, Digitaria sanguinalis and Echinochloa crus-galli. Increasing the extract concentration increased the inhibition, which suggest that the soil may contain growth inhibitory substances and possess allelopathic potential. The extract of the soil under H. plumaeforme was purified and two main inhibitory substances were isolated and determined by MS and ¹H- and ¹³C-NMR spectral data as momilactone A and B. Momilactone A and B inhibited hypocotyls and roots of cress seedlings at concentrations >10 and 1 μm respectively. The endogenous concentration of momilactone A and B in H. plumaeforme was 58.7 and 23.4 μg g^-1 dry weight respectively and the concentration of momilactone A and B in MS growth medium of H. plumaeforme was 4.3 and 6.4 μg g^-1 dry weight of H. plumaeforme, respectively. These results suggest that momilactone A and B were probably secreted into the medium during the incubation and momilactone A and B found in the soil under H. plumaeforme may have been released by the moss. Therefore, growth inhibitory activity of the soil under H. plumaeforme may be caused by momilactone A and B, which may act as allelopathic agents of H. plumaeforme.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Hisashi Kato-Noguchi, Katsuichiro Kobayashi

Research topic(s) for pests/diseases/weeds:
control - general

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Digitaria sanguinalis (weed)
	Echinochloa crus-galli (weed)