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Silicon modulates multi-layered defense against powdery mildew in Arabidopsis

dc.contributor.authorWang, Lili
dc.contributor.authorDong, Min
dc.contributor.authorZhang, Qiong
dc.contributor.authorWu, Ying
dc.contributor.authorHu, Liang
dc.contributor.authorParson, James F.
dc.contributor.authorEisenstein, Edward
dc.contributor.authorDu, Xiangge
dc.contributor.authorXiao, Shunyuan
dc.identifier.citationWang, L., Dong, M., Zhang, Q. et al. Silicon modulates multi-layered defense against powdery mildew in Arabidopsis. Phytopathol Res 2, 7 (2020).en_US
dc.description.abstractSilicon (Si) has been widely employed in agriculture to enhance resistance against pathogens in many crop plants. However, the underlying molecular mechanisms of Si-mediated resistance remain elusive. In this study, the Arabidopsis-powdery mildew pathosystem was employed to investigate possible defense mechanisms of Si-mediated resistance. Because Arabidopsis lacks efficient Si transporters and thus is a low Si-accumulator, two heterologous Si influx transporters (from barley and muskmelon) were individually expressed in wild-type Arabidopsis Col-0 and a panel of mutants defective in different immune signaling pathways. Results from infection tests showed that while very low leaf Si content slightly induced salicylic acid (SA)-dependent resistance, high Si promoted PAD4-dependent but largely EDS1- and SA-independent resistance against the adapted powdery mildew isolate Golovinomyces cichoracearum UCSC1. Intriguingly, our results also showed that high Si could largely reboot non-host resistance in an immune-compromised eds1/pad4/sid2 triple mutant background against a non-adapted powdery mildew isolate G. cichoracearum UMSG1. Taken together, our results suggest that assimilated Si modulates distinct, multi-layered defense mechanisms to enhance plant resistance against adapted and no-adapted powdery mildew pathogens, possibly via synergistic interaction with defense-induced callose.en_US
dc.publisherSpringer Natureen_US
dc.subjectPowdery mildewen_US
dc.subjectSalicylic aciden_US
dc.subjectDisease resistanceen_US
dc.titleSilicon modulates multi-layered defense against powdery mildew in Arabidopsisen_US
dc.relation.isAvailableAtA. James Clark School of Engineeringen_us
dc.relation.isAvailableAtFischell Department of Bioengineeringen_us
dc.relation.isAvailableAtDigital Repository at the University of Marylanden_us
dc.relation.isAvailableAtUniversity of Maryland (College Park, MD)en_us

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