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Interference of allelopathic wheat with different weeds
Author(s) -
Zhang SongZhu,
Li YongHua,
Kong ChuiHua,
Xu XiaoHua
Publication year - 2016
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.3985
Subject(s) - allelopathy , interference (communication) , agronomy , biology , weed , botany , germination , computer science , telecommunications , channel (broadcasting)
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, nine weeds were inhibited significantly by allelopathic wheat but the other 29 weeds were not. DIMBOA levels in wheat varied greatly with weed species. There was no significant relationship between DIMBOA levels and weed suppression effects. Root segregation led to great changes in weed inhibition and DIMBOA level. Compared with root contact, the inhibition of eight weeds was lowered significantly, while significantly increased inhibition occurred in 11 weeds with an increased DIMBOA concentration under root segregation. Furthermore, the production of DIMBOA in wheat was 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. © 2015 Society of Chemical Industry