High temperature effects on Pi54 conferred resistance to Magnaporthe oryzae in two genetic backgrounds of Oryza sativa
作者： Geoffrey Onaga , Kerstin Wydra , Birger Koopmann , Dmytro Chebotarov , Yakouba Séré
DOI: 10.1016/J.JPLPH.2017.02.004
关键词:
摘要: The global temperatures are predicted to rise due climate change. However, knowledge on the mechanisms underlying effect of high temperature (HT) plant pathogen interaction is limited. We investigated elevated host phenotypic, biochemical and gene expression patterns in rice-Magnaporthe oryzae (Mo) pathosystem using two genetic backgrounds, Co39 (Oryzae sativa-indica) LTH (O. sativa-japonica) with (CO LT) without (Co39 LTH) R (Pi54). After exposure 28°C 35°C backgrounds showed contrasting responses Mo. At 28°C, CO, displayed a more severe disease phenotype than LT. Surprisingly, CO became resistant Mo after 35°C. LT were used for further analysis determine defence related transcriptome changes associated HT induced resistance. Pre-exposure triggered intense callose deposits cell wall fluorescence attacked epidermal cells, as well as, increased hydrogen peroxide (H2O2) salicylic acid (SA) levels. Transcriptional combined stress (35°C+Mo) largely overridden by infection both suggesting that plants tended shift their response pathogen. significant differences occurred between single (35°C Mo) double (35°C+Mo). Collectively, our results suggest rice lines carrying Pi54 respond rapid induction H2O2, these resistance amplified at HT. relative difference severity suggests background japonica facilitates function indica rice. phenotypic plasticity reveal presence intricate specific molecular signatures may potentially influence adaptation stresses.
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