期刊
JOURNAL OF PLANT GROWTH REGULATION
卷 31, 期 4, 页码 490-497出版社
SPRINGER
DOI: 10.1007/s00344-012-9258-8
关键词
Euphorbia pekinensis; Endophytic fungi; Isoeuphpekinensin; Nitric oxide; Salicylic acid; Reactive oxygen species
资金
- National Natural Science Foundation of China [31070443, 30500066]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
Nitric oxide (NO), salicylic acid (SA), and reactive oxygen species (ROS) are important signal molecules that mediate plant resistance reactions and play important roles in secondary metabolism. To research the signal transduction pathway of the endophytic fungal elicitor from Fusarium sp. E5 promoting secondary metabolism in Euphorbia pekinensis suspension cells, the changes in NO, SA, ROS, and isoeuphpekinensin contents in the cells were investigated after elicitor addition to the cell suspension culture. The elicitor did not change H2O2 or O-2 (-) contents notably, whereas NO and SA contents were enhanced. Both the NO donator sodium nitroprusside (SNP) and SA enhanced isoeuphpekinensin content in the absence of the fungal elicitor, whereas the NO scavenger cPTIO and SA biosynthesis inhibitor cinnamic acid (CA) inhibited isoeuphpekinensin accumulation in the presence of the elicitor. In addition, cPTIO inhibited SA production induced by the fungal elicitor. CA did not inhibit NO production, but it significantly inhibited isoeuphpekinensin accumulation. The results demonstrated that in Euphorbia pekinensis suspension cells the endophytic fungal elicitor induced increased NO content and SA production, which promoted isoeuphpekinensin accumulation. ROS are clearly not involved in the endophytic fungus-host interaction signaling pathway.
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