[Interactive effects between allelochemical substitutes].
In order to understand the allelopathic mechanisms of rice on weed, the allelochemical substitutes salicylic acid, p-hydroxybenzonic acid, cinnamic acid, vanillic acid and ferulic acid were used in an orthogonally gyrating regression experiment to study their interactive effects on the growth of barnyardgrass. The results indicated that whether the interactive effects between two substitutes, e.g., between salicylic and cinnamic acid or between salicylic and p-hydrobanzonic acid, were synergistic or antagonistic depended on the concentrations of each substitutes in the mixture. In the mixture of salicylic acid and p-hydrobanzonic acid, the effect of salicylic acid was synergistic at < 0.14 mmol.L(-1) but antagonistic at > 0.14 mmol.L(-1), while p-hydrobanzonic acid showed an antagonistic effect at > 0.425 mmol.L(-1). Salicylic acid at all test concentrations exhibited antagonism to cinnamic acid, while cinnamic acid had a synergistic at < 0.14 mmol.L(-1), but an antagonistic effect at >0.14 mmol.L(-1) on alicylic acid. The interactive effects between cinnamic and ferulic acid were all synergistic at test concentrations.
He
Huaqin
H
Key Laboratory of Pesticide and Chemical Biology of Education Ministry, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China. hehuaqin@pub2.fz.fj.cn
Shen
Lihua
L
Song
Biqing
B
Guo
Yuchun
Y
Liang
Yiyuan
Y
Liang
Kangjing
K
Lin
Wenxiong
W
D002934:Cinnamates / Q000737:chemistry*; D004347:Drug Interactions; D062385:Hydroxybenzoates / Q000737:chemistry*; D012275:Oryza / Q000737:chemistry / Q000254:growth & development; D010675:Pheromones / Q000737:chemistry*; D006109:Poaceae / Q000254:growth & development; D020156:Salicylic Acid / Q000737:chemistry*; D014641:Vanillic Acid / Q000737:chemistry
D002934:Cinnamates; D062385:Hydroxybenzoates; D010675:Pheromones; C029010:cinnamic acid; D014641:Vanillic Acid; D020156:Salicylic Acid