title: The effects of host defence elicitors on betacyanin accumulation in Amaranthus mangostanus seedlings.
abstract: The effect of elicitors associated with host defence on betacyanin accumulation in Amaranthus mangostanus seedlings was investigated. Under the conditions of the experiments, betacyanin accumulation was generally enhanced by light. Methyl jasmonate (MeJA) treatment increased betacyanin synthesis in a concentration-dependent response. Seedlings treated with ethylene as 5mM Ethephon also had elevated levels of betacyanin. In contrast, salicylic acid (SA) and H(2)O(2) treatments had no influence on betacyanin contents in light or dark. Combined MeJA with Ethephon or H(2)O(2) had an additive effect on betacyanin accumulation in dark-grown seedlings. However, a decline was recorded in light-grown seedlings. Moreover, an antagonistic effect on betacyanin synthesis was found when MeJA and SA were added simultaneously. Our results indicate that betacyanin content in A. mangostanus seedlings can be upregulated by MeJA and ethylene. Both additive and antagonistic effects in regulating betacyanin synthesis in A. mangostanus seedlings were observed between MeJA and other elicitors.
authors: The University of Queensland, School of Agriculture and Food Sciences, Gatton Qld 4343, Australia. s.cao1@uq.edu.au
authors: Shifeng
authors: S
authors: Cao
authors: Ting
authors: T
authors: Liu
authors: Yueming
authors: Y
authors: Jiang
authors: Shenggen
authors: S
authors: He
authors: Dion K
authors: DK
authors: Harrison
authors: Daryl C
authors: DC
authors: Joyce
mesh_terms: D000085:Acetates / Q000032:analysis / Q000378:metabolism*; D027721:Amaranthus / Q000737:chemistry / Q000254:growth & development / Q000378:metabolism* / Q000528:radiation effects; D050859:Betacyanins / Q000032:analysis / Q000378:metabolism*; D003517:Cyclopentanes / Q000032:analysis / Q000378:metabolism*; D006861:Hydrogen Peroxide / Q000032:analysis / Q000378:metabolism*; D008027:Light; D054883:Oxylipins / Q000032:analysis / Q000378:metabolism*; D020156:Salicylic Acid / Q000032:analysis / Q000378:metabolism*; D036226:Seedlings / Q000737:chemistry / Q000254:growth & development* / Q000378:metabolism / Q000528:radiation effects
chemical_list: D000085:Acetates; D050859:Betacyanins; D003517:Cyclopentanes; D054883:Oxylipins; C072239:methyl jasmonate; D006861:Hydrogen Peroxide; D020156:Salicylic Acid