Interactive effects between allelochemical substitutes

Abstract

Abstract: 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稬^-1 but antagonistic at >0.14 mmol稬^-1,while p-hydrobanzonic acid showed an antagonistic effect at >0.425 mmol稬^-1.Salicylic acid at all test concentrations exhibited antagonism to cinnamic acid,while cinnamic acid had a synergistic at <0.14 mmol稬^-1,but an antagonistic effect at >0.14 mmol稬^-1 on alicylic acid.The interactive effects between cinnamic and ferulic acid were all synergistic at test concentrations.

Key words: Allelochemical, Substitute, Interactive effect, Synergistic, Antagonistic

CLC Number:

Q946

HE Huaqin, SHEN Lihua, SONG Biqing, GUO Yuchun, LIANG Yiyuan, LIANG Kangjing, LIN Wenxiong . Interactive effects between allelochemical substitutes[J]. Chinese Journal of Applied Ecology, 2005, 16(5): 890-894.

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