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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Potential allelopathic effects of the tropical legume Sesbania virgata on the alien Leucaena leucocephala related to seed carbohydrate metabolism

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Broch Mignoni, Daiane Salete [1] ; Simes, Kelly [1] ; Braga, Marcia Regina [1]
Total Authors: 3
[1] Inst Bot, Dept Plant Physiol & Biochem, Av Miguel Estefano 3687, BR-04301902 Sao Paulo, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Biological Invasions; v. 20, n. 1, p. 165-180, JAN 2018.
Web of Science Citations: 3

Allelopathy has been considered a key mechanism to explain the invasiveness of some species. It is well known that invasive plants can affect native plants by producing novel allelochemicals but some exotic plant species may be also sensitive to allelochemicals released by native species, providing a tool to reduce growth and impacts of invasive exotic species. Here, using growth chamber experiments we tested the mutual potential allelopathic effects of Sesbania virgata (a native dominant species) and the alien Leucaena leucocephala seeds. S. virgata was unaffected by seed leachates of L. leucocephala, indicating that, under lab conditions, this legume presents resistance to the phytotoxic compounds produced by seeds of this alien species. In contrast, germination and seedling growth of L. leucocephala were strongly affected by the phytochemicals produced by seeds of S. virgata. A delay in endospermic mobilization of storage carbohydrates (raffinose-family oligosaccharides and galactomannan) was observed in the alien species. These potential allelopathic effects could not be attributed sole to the presence neither of the phytoxic catechin nor of ABA in seed leachates of S. virgata. Our findings indicate that the in vitro behavior of S. virgata is consistent with its aggressiveness in natural environment and suggest sesbanimide as a potential candidate as implicated in the noxious effects of S. virgata on the alien species. (AU)

FAPESP's process: 12/16332-0 - Storage and cell wall carbohydrates from plants and filamentous fungi: changes in response to alelochemicals and environmental conditions
Grantee:Marcia Regina Braga
Support type: Regular Research Grants
FAPESP's process: 13/03978-1 - Phytotoxic potential of Sesbania virgata seeds on germination and early growth of seedlings Leucaena leucocephala (Lam.)de Wit
Grantee:Daiane Salete Broch Mignoni
Support type: Scholarships in Brazil - Master