植保素
茉莉酸
赤霉素
水杨酸
脱落酸
生物
植物
藤仓赤霉素
病菌
植物对草食的防御
作者
Ilenia Siciliano,Greice Amaral Carneiro,Davide Spadaro,Angelo Garibaldi,Maria Lodovica Gullino
标识
DOI:10.1021/acs.jafc.5b03018
摘要
Fusarium fujikuroi, the causal agent of bakanae disease, is the main seedborne pathogen on rice. To understand the basis of rice resistance, a quantitative method to simultaneously detect phytohormones and phytoalexins was developed by using HPLC–MS/MS. With this method dynamic profiles and possible interactions of defense-related phytohormones and phytoalexins were investigated on two rice cultivars, inoculated or not with F. fujikuroi. In the resistant cultivar Selenio, the presence of pathogen induced high production of phytoalexins, mainly sakuranetin, and symptoms of bakanae were not observed. On the contrary, in the susceptible genotype Dorella, the pathogen induced the production of gibberellin and abscisic acid and inhibited jasmonic acid production, phytoalexins were very low, and bakanae symptoms were observed. The results suggested that a wide range of secondary metabolites are involved in plant defense against pathogens and phytoalexin synthesis could be an important factor for rice resistance...
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