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Full Supporting Figure legends
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Figure S1: Enriched gene ontology (GO) terms for up-regulated genes in transgenic barley
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lines expressing the wheat Lr34res. (a) Seedling stage, (b) Mature leaf stage. The node size
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reflects the number of genes attributed to the respective category. Colored nodes represent GO
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terms which are significantly overrepresented (corrected P value of <0.05). More intense color
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indicates higher statistical significance as indicated on the right of the Figure.
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Figure S2. MapMan maps for overview of transcriptomics. Maps showing differences in
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transcripts belonging to different functional classes between wild-type (Sib) and transgenic
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barley in two growth stages, seedling and mature leaves. In the color scale, blue represents
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genes down-regulated by at least 5-fold in transgenics and red represents 5-fold up-regulation
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in seedling and mature leaf stages.
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Figure S3: MapMan maps for metabolism overview. Maps showing differences in transcript
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levels between wild type (Sib) and transgenic barley expressing Lr34res in two growth stages,
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seedling (left) and mature (right) leaves. In the color scale, blue represents genes down
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regulated by at least 5-fold and red represents 5-fold up-regulation in seedling and mature leaf
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stage.
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Figure S4: qRT-PCR expression analysis of genes involved in the biosynthesis of JA in wild-
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type (Sib) and transgenic barley. qPCR analysis were performed in wild-type (Sib) plants and
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plants from two transgenic lines expressing Lr34res (BG8 and BG9) and two growth stages,
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seedling leaves and mature leaves. At least three biological replicates and three technical
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replicated were used for analysis and values on Y-axis represent relative transcript abundance
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compared to Sib and error bars represent standard error. (AOS=allene oxide synthase, AOC=
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allene
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value=<0.01, calculated by student t-test).
oxide
cyclase,
OPR=oxophytodienoate
reductase)
(*=p-value=<0.05;
**=p-
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Figure S5: Hypothetical representation of Lr34res-mediated biochemical pathways in
transgenic barley plants (modified from Caldo et al., 2004). The enzyme names are given in
red color and the red box indicates the genes which are up-regulated in transgenic barley
plants expressing Lr34res.
Source: Caldo, R.A., Nettleton, D. and Wise, R.P. (2004) Interaction-dependent gene
expression in Mla-specified response to barley powdery mildew. Plant Cell, 16(9), 2514–
2528.
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Figure S6. Quantification of hordatines. Relative quantification of hordatines in barley
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seedlings based on extracted ion chromatograms of the [M+2H]2+ ions. Sib = sister line,
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BG8, BG9 = transgenic lines, peak areas are given relative to internal standard ampicillin,
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values are means of five biological replicates and error bars represents standard error (***=p-
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value=<0.001, calculated by student t-test).
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Figure S7: Accumulation of defense hormones, salicylic acid (SA) and jasmonic acid (JA) in
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wild-type cv. Bobwhite (BW) and transgenic wheat plants of line Ta54 expressing Lr34res,
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before and after rust infection (-INF). At least five biological replicates were used for analysis
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and error bar represent standard error (***=p-value=<0.001, calculated by student t-test).
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Figure S8: (a) Heterologous transcript levels of new Lr34 alleles (M1 and M2) in barley
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showed induced LTN by the M1 allele. (b) RT-qPCR analysis of the Lr34res (BG8), M1 and
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M2 alleles. The values represents the mean expression of three different T1 transgenic
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families, respectively and error bar represent standard error. The transcript levels were
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normalized to the reference gene GAPDH and three biological replicates and three technical
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replicates were used for expression analysis.
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M1 = deletion of phenylalanine 546 with tyrosine 634; M2 = phenylalanine 546 with histidine
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634
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Figure S9: Response of different wheat genotypes towards leaf rust. Two-week-old seedlings
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were infected with wheat leaf rust, pathotype Mackeller and grown for four weeks after
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infection at 4 oC. Three different leaves (second, third and fourth leaf) are shown in the figure
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of genotypes viz. Thatcher isolines with Lr34res (Th34), Lr34sus (Th16), Bobwhite with
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Lr34sus, transgenic Bobwhite expressing Lr34res (Ta54), sib line of M1 and transgenic
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Bobwhite expressing M1 allele (M1-143).
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Figure S10: Eight-week-old mature plants grown in the greenhouse: wild-type plant from
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cultivar Golden Promise (GP), an F2 plant containing both Lr34res and Lr34sus alleles
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derived from a cross of BG8xSUS3. Transgenic barley having both Lr34res and Lr34sus
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alleles showed reduction of the LTN phenotype.
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Figure S11: Relative transcript levels of Lr34res and Lr34sus alleles in F2 progenies of BG8 x
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SUS3 and BG9 x SUS3. Two independent crosses were made and analyzed for each parental
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combination (upper and lower panel). Transcript levels were calculated based on ∆Cq values
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using primers for Lr34res, Lr34sus and the reference gene GAPDH. Transcript levels for both
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alleles are shown in the same graph. Bars represent mean expression values of 3-4 biological
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replicates. Letters indicate lines with equivalent expression levels (Students t-test on Log10-
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transformed expression values, α>0.05). Error bars represent the 95% confidence intervals
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(back transformed). ‘R’ = F2 progenies with only Lr34res; ‘RS’ = F2 progenies with both
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alleles and ‘S’ = F2 progenies with only Lr34sus. The 3-4 biological replicates for ‘R’, ‘RS’
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and ‘S’ represent a mixture of homozygous and heterozygous F2 progeny.
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Figure S12: Accumulation of defense hormones before and after infection (inf): salicylic acid
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(a) and jasmonic acid (b) in third leaves of three-week-old barley seedlings of wild type (GP:
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cultivar Golden Promise) and transgenic plants expressing Lr34res, Lr34sus and F2 plants
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expressing both alleles, respectively. Values represent the mean of five biological replicates
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and error bars represent standard error. For leaf-rust infected plants, hormone measurements
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were done seven days after rust infection (***=p-value=<0.001, calculated by student t-test).
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Supporting Table S1-Differential expression in seedling stage
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Supporting Table S2-Differential expression in mature leaf
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Supporting Table S3-Agronomic performance
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Supporting experimental procedures-Methods S4
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Supporting Table S5-Primers for qRT-PCR
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Supporting Table S6: Segregation analysis
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