5 years ago

Effects of dual inoculation of AMF and rhizobium on alfalfa ( Medicago sativa ) root rot caused by Microdochium tabacinum

Yane Guo, Yingde Li, Tingyu Duan, Ping Gao

Abstract

This experiment aimed to test the combined effects of arbuscular mycorrhizal fungi (AMF) and rhizobium (Sinorhizobium medicae) on the alfalfa root rot (Microdochium tabacinum) disease. The results show a significant increase in alfalfa growth, induced by AMF, independent of inoculation with rhizobium. Inoculation with S. medicae increased alfalfa N concentration compared with un-inoculated plants. In the presence of both AMF and S. medicae, the N, P concentration of plant were significantly greater than in their absence. M. tabacinum caused plant branches wilt and significantly reduced plant total dry weight as well as N, P concentration. Inoculation of AMF increased nodule numbers, independent of the presence of other factors. AMF and rhizobium reduced alfalfa branches discoloration by 18%. Plant disease related enzyme, peroxidase (POD), and catalase (CAT) showed a positive response to both AMF and rhizobium, while the malondialdehyde (MDA) content responded negative.

Publisher URL: https://link.springer.com/article/10.1007/s13313-018-0543-2

DOI: 10.1007/s13313-018-0543-2

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