Relationships between the shoot Cu concentration (A), root Cu concentration (B) and the ratio of the Cu concentration in shoots to that in roots of <i>E</i>. <i>haichowensis</i> (C) and the leaf transpiration rate.

<p>Mean value followed by different letter is statistically significant (ANOVA; Duncan multiple range test, p<0.01).</p

Microstructure of the root cells of two plant species.

<p>(<b>A</b>) Paraffin cross section of <i>O</i>. <i>glazioviana</i>, (<b>B</b>) electron micrograph of <i>O</i>. <i>glazioviana</i> cross-section, (<b>C</b>) paraffin cross section of <i>E</i>. <i>haichowensis</i>, and (<b>D</b>) electron micrograph of a cross section of <i>E</i>. <i>haichowensis</i>.</p

The lower epidermis as shown by SEM.

<p>(<b>A</b>) Lower epidermis of <i>O</i>. <i>glazioviana</i>, (<b>B</b>) magnifying epidermal stoma of <i>O</i>. <i>glazioviana</i>, (<b>C</b>) lower epidermis of <i>E</i>. <i>haichowensis</i>, and (<b>D</b>) magnifying epidermal stoma of <i>E</i>. <i>haichowensis</i>.</p

ABA contents in the leaves of <i>O</i>. <i>glazioviana</i> and <i>E</i>. <i>haichowensis</i> seedlings with treatment with 0 or 50 μM CuSO₄.

<p>Mean value followed by different letter is statistically significant (ANOVA; Duncan multiple range test, p<0.05).</p

The adsorption of Cu²⁺ in the root cell walls of <i>O</i>. <i>glazioviana</i> and <i>E</i>. <i>haichowensis</i>.

<p>Mean value followed by different letter is statistically significant (ANOVA; Duncan multiple range test, p<0.05).</p

Wax content in leaves and stomatal density of the leaf epidermis of <i>O</i>. <i>glazioviana</i> and <i>E</i>. <i>haichowensis</i> seedlings.

<p>Mean value followed by different letter is statistically significant (ANOVA; Duncan multiple range test, p<0.05).</p><p>Wax content in leaves and stomatal density of the leaf epidermis of <i>O</i>. <i>glazioviana</i> and <i>E</i>. <i>haichowensis</i> seedlings.</p