A new quassinoid, ailantinol H, was isolated from the aerial parts of Ailanthus altissima. The structure was elucidated based on spectral evidence.

Numerous studies have asked whether communities with many species deter invasions more so than do species-poor communities or whether dominant species deter invasion by colonizing species. However, little is known about whether high intraspecific diversity can deter biological invasions or whether particular genotypes might deter invasions. In this study, we present experimental evidence that i...

Adult life spans of only one or two days characterise life cycles of the fig wasps (Agaonidae) that pollinate fig trees (Ficus spp., Moraceae). Selection is expected to favour traits that maximise the value of the timing of encounters between such mutualistic partners, and fig wasps are usually only attracted to their hosts by species- and developmental-stage specific volatiles released from fi...

Background: In the present study, tolerance of plantain tree species (Platanus orientalis, Morus nigra and Ailanthus altissima) to air pollution was evaluated using Air Pollution Tolerance Index (ATPI) Anticipated Performance (API) index in Isfahan city (Iran). Methods: For this purpose, three dominant trees growing at six stations selected then sampling leaves performed, after being transferre...

Invasion of forest ecosystems by invader plants and fires are two the most serious environmental problems in world. Climate change is believed to strongly influence these processes, invasibility invasive alien (IAPs) likely enhance landscape degradation. Therefore, it urgent study germinative behaviour relation fire detect possible barrier species IAPs among native species. Tree usually damagin...