Phenolic exudates from Ludwigia peploides and Azolla sp. enhance germination of Polygonum ferrugineum seeds

The release of allelochemicals by aquatic macrophytes can inhibit or benefit other plants. Here we studied allelopathic interactions between syntopic species native to the Neotropical region. First, we quantified the phenolic exudation in monospecies cultures of Ludwigia peploides (L) and Azolla sp. (A) and in co-cultures of both species growing together (A + L) compared to control water. Then, we studied the germination of Polygonum ferrugineum...