文献类型： 外文期刊

作者： Huang, Wen-kun ² ; Ji, Hong-li ¹ ; Gheysen, Godelieve ¹ ; Debode, Jane ⁴ ; Kyndt, Tina ¹ ;

作者机构： 1.Univ Ghent, Dept Mol Biotechnol, B-9000 Ghent, Belgium

2.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100193, Peoples R China

3.Sichuan Acad Agr Sci, Inst Plant Protect, Chengdu 610066, Peoples R China

4.Inst Agr & Fisheries Res ILVO, Plant Sci Unit Plant Protect, B-9820 Merelbeke, Belgium

关键词： Biochar;Meloidogyne graminicola;Hydrogen peroxide;Lignin;Callose

期刊名称：BMC PLANT BIOLOGY （ 影响因子：4.215； 五年影响因子：4.96 ）

ISSN： 1471-2229

年卷期： 2015 年 15 卷

页码：

收录情况： SCI

摘要： Background: Biochar is a solid coproduct of biomass pyrolysis, and soil amended with biochar has been shown to enhance the productivity of various crops and induce systemic plant resistance to fungal pathogens. The aim of this study was to explore the ability of wood biochar to induce resistance to the root-knot nematode (RKN) Meloidogyne graminicola in rice (Oryza sativa cv. Nipponbare) and examine its histochemical and molecular impact on plant defense mechanisms. Results: A 1.2 % concentration of biochar added to the potting medium of rice was found to be the most effective at reducing nematode development in rice roots, whereas direct toxic effects of biochar exudates on nematode viability, infectivity or development were not observed. The increased plant resistance was associated with biochar-primed H2O2 accumulation as well as with the transcriptional enhancement of genes involved in the ethylene (ET) signaling pathway. The increased susceptibility of the Ein2b-RNAi line, which is deficient in ET signaling, further confirmed that biochar-induced priming acts at least partly through ET signaling. Conclusion: These results suggest that biochar amendments protect rice plants challenged by nematodes. This priming effect partially depends on the ET signaling pathway and enhanced H2O2 accumulation.