AI Article Synopsis
- Strigolactones (SLs) enhance rice plants' defense against the rice blast fungus, Magnaporthe oryzae.
- Impairments in SL-biosynthesis (d17) or signaling (d14) lead to higher susceptibility to the fungus and reduced expression of key defense genes.
- Wild-type (WT) plants show increased levels of hydrogen peroxide and soluble sugars during the infection, suggesting SLs play a crucial role in activating defense mechanisms.
Article Abstract
This study presents evidence that strigolactones (SLs) promote defense against devastating rice blast fungal pathogen Magnaporthe oryzae. Impairment in either SL-biosynthetic dwarf17 (d17) or -signaling (d14) led to increased susceptibility towards M. oryzae. Comparative transcriptome profiling of the SL-signaling d14 mutant and WT plants revealed that a large number of defense-associated genes including hydrogen peroxide (HO)-, ethylene- and cell wall-synthesis-related genes were remarkably suppressed in d14 with respect to that of WT plants, during M. oryzae infection. In addition, various KEGG metabolic pathways related to sugar metabolism were significantly suppressed in the d14 plants compared to WT, during M. oryzae infection. Accordingly, WT plants accumulated increased levels of HO and soluble sugar content compared to that of d17 and d14 in response to M. oryzae infection. Altogether, these results propose that SLs positively regulated rice defense against M. oryzae through involvement in the induction of various defense associated genes/pathways.
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| http://dx.doi.org/10.1016/j.plaphy.2019.06.028 | DOI Listing |
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