English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The release of allelochemicals by plants can affect the performance of other organisms positively or negatively. We tested the effects of aqueous extracts and leachates derived from the leaves and roots of the invasive water primrose ( Ludwigia hexapetala ) on one submerged native species –  Ceratophyllum demersum , and two exotic species – the submerged  Egeria densa  and the emergent growth form of  Myriophyllum aquaticum . The effect of the aqueous extracts and leachates of  L. hexapetala  on photosynthetic yield, growth (i.e., relative growth rate, leaf area), root length, and length of the lateral shoots of each species were analyzed in spring and in autumn. In autumn, an allelopathic effect was established on the traits of the three macrophytes species. The root extracts stimulated leaf area and the photosynthetic yield of  C. demersum  and of  E. densa , whereas leaf treatments (leachates and extracts) and root leachate reduced the leaf area of  M. aquaticum . The autumnal root leachate of  L. hexapetala  decreased the relative growth rate of  C. demersum , whereas it had no effect on the two others plants. The root extract increased the length of lateral branches of  M. aquaticum  in autumn, suggesting a positive effect of  L. hexapetala  on the lateral growth of  M. aquaticum.  Three main allelochemicals were identified in leaves: quercitrin, prunin, myricitrin. The concentrations of these allelochemicals were greater in the leaf extract taken from  L. hexapetala  in autumn than in spring, and those found in the leaf leachates for both seasons. This assessment of autumnal allelopathy could help to explain the patterns of plant community succession in invaded areas.

Allelopathic Effect of the Invasive Ludwigia hexapetala on Growth of Three Macrophyte Species