Transcriptomics of Epichloë-Grass Symbioses in Host Vegetative and Reproductive Stages

Molecular Plant-microbe Interactions : MPMI
Padmaja NagabhyruC L Schardl

Abstract

Epichloë species are fungal symbionts (endophytes) of cool-season grasses that transmit vertically via inflorescence primordia (IP), ovaries (OV), and ultimately, embryos. Epichloë coenophiala, an endophyte of tall fescue (Schedonorus arundinaceus), provides multiple protective benefits to the grass. We conducted transcriptome analysis of the tall fescue-E. coenophiala symbiosis, comparing IP, OV, vegetative pseudostems (PS), and the lemma and palea (LP) (bracts) of the young floret. Transcriptomes of host OV and PS exhibited almost no significant differences attributable to endophyte presence or absence. Comparison of endophyte gene expression in different plant parts revealed numerous differentially expressed genes (DEGs). The 150 endophyte DEGs significantly higher in PS over OV included genes for alkaloid biosynthesis and sugar or amino acid transport. The 277 endophyte DEGs significantly higher in OV over PS included genes for protein chaperones (including most heat-shock proteins), trehalose synthesis complex, a bax inhibitor-1 protein homolog, the CLC chloride ion channel, catalase, and superoxide dismutase. Similar trends were apparent in the Brachypodium sylvaticum-Epichloë sylvatica symbiosis. Gene expression profiles...Continue Reading

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Citations

Dec 21, 2018·Frontiers in Microbiology·Erika Kothe, Katarzyna Turnau
Jun 21, 2020·World Journal of Microbiology & Biotechnology·R BharadwajS Ramalingam
Jul 30, 2021·Environmental Research·Andrea C UenoM Alejandra Martínez-Ghersa
Jun 1, 2019·Journal of Agricultural and Food Chemistry·Wei ZhangStuart D Card

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