Global gene expression profiling of two switchgrass cultivars following inoculation with Burkholderia phytofirmans strain PsJN

Journal of Experimental Botany
Alejandra Lara-ChavezChuansheng Mei

Abstract

Improvement and year-to-year stabilization of biomass yields are primary objectives for the development of a low-input switchgrass feedstock production system using microbial endophytes. An earlier investigation of the effect of Burkholderia phytofirmans strain PsJN on switchgrass germplasm demonstrated differential responses between genotypes. PsJN inoculation of cv. Alamo (lowland ecotype) increased the plant root system, shoot length, and biomass yields, whereas it had no beneficial effect on cv. Cave-in-Rock (upland ecotype). To understand the gene networks governing plant growth promotion responses triggered by PsJN, the gene expression profiles were analysed in these two hosts, following seedling inoculation. The Affymetrix platform switchgrass expressed sequence tag (EST) microarray chip representing 122 972 probe sets, developed by the DOE BioEnergy Science Center, was employed to assess transcript abundance at 0.5, 2, 4, and 8 DAI (days after PsJN inoculation). Approximately 20 000 switchgrass probe sets showed significant responses in either cultivar. Switchgrass identifiers were used to map 19 421 genes in MapMan software. There were apparent differences in gene expression profiling between responsive and non-respons...Continue Reading

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Citations

Sep 12, 2015·Journal of Experimental Botany·Nicholas C Carpita, Rowan F Sage
May 11, 2017·Annual Review of Phytopathology·Günter BraderAngela Sessitsch
Sep 3, 2019·Frontiers in Microbiology·Jennifer KearlBrent L Nielsen
Apr 4, 2021·International Journal of Molecular Sciences·Ashley K Miller, Brent L Nielsen

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