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- Title
Interference of allelopathic wheat with different weeds.
- Authors
Zhang, Song‐Zhu; Li, Yong‐Hua; Kong, Chui‐Hua; Xu, Xiao‐Hua
- Abstract
BACKGROUND: Interference of allelopathic wheat with weeds involves a broad spectrum of species either independently or synergistically with competitive factors. This study examined the interference of allelopathic wheat with 38 weeds in relation to the production of allelochemical 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA) in wheat with and without root-root interactions. RESULTS: There were substantial differences in weed biomass and DIMBOA concentration in wheat-weed coexisting systems. Among 38 weeds, nineweedswere inhibited significantly by allelopathic wheat but the other 29 weedswere not.DIMBOA levels in wheat varied greatlywith weed species. Therewas no significant relationship between DIMBOA levels and weed suppression effects. Root segregation led to great changes inweed inhibition and DIMBOA level. Comparedwith root contact, the inhibition of eightweedswas loweredsignificantly, while significantly increased inhibition occurredin 11weedswith anincreasedDIMBOA concentration under root segregation. Furthermore, the production of DIMBOA in wheatwas induced by the root exudates from weeds. CONCLUSION: Interference of allelopathic wheat with weeds not only is determined by the specificity of the weeds but also depends on root-root interactions. In particular, allelopathic wheat may detect certain weeds through the root exudates and respond by increasing the allelochemical, resulting in weed identity recognition.
- Subjects
WHEAT farming; ALLELOPATHIC agents; WEEDS; BENZOXAZINES; METHOXY compounds
- Publication
Pest Management Science, 2016, Vol 72, Issue 1, p172
- ISSN
1526-498X
- Publication type
Article
- DOI
10.1002/ps.3985