Quantification of O2- (A) and H₂O₂ (B) content of <i>A</i>. <i>stolonifera</i> and <i>A</i>. <i>scabra</i> following control or heat-stress treatment and histochemical staining of <i>A</i>. <i>stolonifera</i> and <i>A</i>. <i>scabra</i> roots with NBT (C) or DAB (D).

<p>Data shown are the mean ± SE of four biological replicates. Different letters atop bars indicate significant differences exist at the P ≤ 0.05 level. Bar represents 100 μm.</p

Histochemical staining of <i>A</i>. <i>stolonifera</i> (A to F) and <i>A</i>. <i>scabra</i> (G to L) root tips under control and heat stress conditions using NBT.

<p>Bar represents 100 μm.</p

Transcript levels of <i>APX</i> (A), <i>GR</i> (B), <i>MR</i> (C) and <i>DR</i> (D) in roots of <i>A</i>. <i>stolonifera</i> and <i>A</i>. <i>scabra</i> under control or heat stress condition.

<p>Data shown are the mean ± SE of four biological replicates. Different letters atop bars indicate significant differences exist at the P ≤ 0.05 level.</p

Enzymatic activity of SOD (A), POD (B) and CAT (C) in roots of control or heat-stressed <i>A</i>. <i>stolonifera</i> and <i>A</i>. <i>scabra</i>.

<p>Data shown are the mean ± SE of four biological replicates. Different letters atop bars indicate significant differences exist at the P ≤ 0.05 level.</p

Root respiration rate for <i>A</i>. <i>stolonifera</i> and <i>A</i>. <i>scabra</i> under heat stress condition as affected by SNP or SHAM.

<p>Data shown are the mean ± SE of four biological replicates. Different letters atop bars indicate significant differences exist at the P ≤ 0.05 level.</p