The inhibitory allelopathic activities of leaves and leaf-origin suspension cultured cells Spiraea thunbergii, putative allelochemicals, cis- trans-cinnamic acid, were investigated by the protoplast co-culture method with digital image analysis (DIA-PP method) using lettuce as a recipient. optimal conditions 2,4-dichlorophenoxyacetic acid (2,4-D) benzyladenine (BA) for cell division S. thunberg...

Aim The invasion of exotic macrophytes causes native biodiversity loss in aquatic ecosystems China. However, the influence invasive free-floating on epiphytic algal communities has rarely been reported, especially comparison with those macrophytes. Region Southern Methods We investigated interrelationship between roots three [two species (Eichhornia crassipes and Pistia stratiotes) one (Hydroch...

Analysis by GC-MS/MS showed that a worldwide collection of 58 wheat accessions differed significantly in the amounts of 7 known phenolic acids exuded by the living roots of 17-day-old wheat seedlings. The quantities of exuded allelochemicals varied with the specific compound and ranged from 2.3 to 18.6, from 0.6 to 17.5, from 0.1 to 4.9, from 0.0 to 52.7, from 0.33 to 12.7, from 1.5 to 20.5, an...

Larvae of the polyphagous tobacco cutworm moth, Spodoptera litura (S. litura), encounter potentially toxic allelochemicals in food. It is therefore important for S. litura to produce detoxification enzymes such as cytochrome P450 monooxygenases (P450s). In this study, we have identified two novel cytochrome P450 genes of S. litura, named CYP321A7 and CYP321A9. Phylogenetic analysis indicated th...

Herbivory activates the synthesis of allelochemicals that can mediate plant-plant interactions. There is an inverse relationship between the activity of xylophages and the abundance of epiphytes on Ipomoea murucoides. Xylophagy may modify the branch chemical constitution, which also affects the liberation of allelochemicals with defense and allelopathic properties. We evaluated the bark chemica...

BACKGROUND AND AIMS Is the release of allelochemicals by the dominant tussock grass Festuca paniculata responsible for its dominance by inhibiting growth of neighbour grasses in subalpine grasslands? As such a community is also structured by mowing practices, what could be the impact of mowing on allelopathy? METHODS A design was used that isolated allelopathy from resource competition by sep...

During recent decades, many tropical reefs have transitioned from coral to macroalgal dominance. These community shifts increase the frequency of algal-coral interactions and may suppress coral recovery following both anthropogenic and natural disturbance. However, the extent to which macroalgae damage corals directly, the mechanisms involved, and the species specificity of algal-coral interact...

Coevolving interactions between a plant population and its microbiota can potentially yield a rhizosphere enriched in metagenomes containing the blueprints for a vast array of natural products. We describe a method of isolating those metabolites through activity-based screening of soil metagenomic libraries. The method allows for the isolation of small molecules produced in vector– host express...

agement strategies for rice, which would be less dependent on synthetic herbicides. A bioactivity-guided isolation method was developed with the obThe search for allelochemicals in rice necessitates jective of isolating the allelochemicals in rice (Oryza sativa L.). Roots evaluating the activity in a laboratory set-up to distinof the allelopathic rice cultivar Taichung Native 1, grown hydroponi...