allelopathic chemicals造句

• The spraying of nematicides also causes plants to release allelopathic chemicals.
• The worst offenders are allelopathic chemicals that prevent other plants from growing.
• Sugarberry's allelopathic chemicals that inhibit seed germination and growth in many other plant species.
• Some perennials such as couch grass exude allelopathic chemicals that inhibit the growth of other nearby plants.
• Another aspect of diffuse knapweed s success relies on the effect of its allelopathic chemicals in its novel environment.
• The plant produces Allelopathic chemicals that suppress crop and pasture plants, and allergens that affect humans and livestock.
• As a result, the allelopathic chemicals will be able to reach higher concentrations, spread farther and therefore be more effective.
• An example is allelopathic chemicals which indigenous plants are not yet adapted to, a scenario sometimes called the " novel weapons hypothesis ".
• Mycelial networks may also be responsible for facilitating the transport of allelopathic chemicals from the supplying plant directly to the rhizosphere of other plants.
• Curiously, diffuse knapweed s allelopathic chemicals were shown to have a deleterious effect on the North American competitors but were beneficial to its native competitors.
• While diffuse knapweed s native competitors are able to compete more effectively in the presence of allelopathic chemicals, the novel competitor s fitness is decreased.
• A higher density of knapweed will not only increase the concentration of allelopathic chemicals in the soil but will also restrict the nutrients available to native plants.
• "' Ailanthone "'is an allelopathic chemical that is produced by the " Ailanthus altissima " tree which inhibits the growth of other plants.
• This situation provides an example of the effectiveness of the allelopathy mechanism benefiting from the ERH . The increased effectiveness of allelopathic chemicals cause diffuse knapweed to experience less competitive pressure.
• Another connection between allelopathy and the ERH is the fact that concentrations of allelopathic chemicals were found to increase when diffuse knapweed was planted in North American soil as opposed to Eurasian soil.
• However, tests conducted on the effect of diffuse knapweed on North American grasses in the absence on allelopathic chemicals demonstrated that the fitness of these grasses declined in the presence of diffuse knapweed.
• "Z . matrella " shoot's contain allelopathic chemicals that appear to affect germination rates, radicle length, and shoot length with varying levels of harm with other plants.
• Although there is still debate concerning the effectiveness of allelopathic chemicals in the field, the evidence of allelopathic effects demonstrated in a laboratory setting and its propensity to establish monocultures support the importance of allelopathy to diffuse knapweed s success.
• Asian and European chemists have found some justification for its medical use as it contains a long list of active chemicals that include quassin and saponin, while ailanthone, the allelopathic chemical in the tree of heaven, is a known antimalarial agent.