Relative expression of <i>PAL</i> and <i>ICS</i> in <i>S</i>. <i>baicalensis</i> roots (A) under drought and salt stress (B) and (C) in exogenous SA treatment (n = 9, * <i>P</i><0.05, NS: non-significant).

<p>Relative expression of <i>PAL</i> and <i>ICS</i> in <i>S</i>. <i>baicalensis</i> roots (A) under drought and salt stress (B) and (C) in exogenous SA treatment (n = 9, * <i>P</i><0.05, NS: non-significant).</p

Correlation of SA with PAL, ICS, and metabolites in gene-silenced <i>S</i>. <i>baicalensis</i> roots.

<p>Correlation of SA with PAL, ICS, and metabolites in gene-silenced <i>S</i>. <i>baicalensis</i> roots.</p

Primers for RACE PCR.

<p>Primers for RACE PCR.</p

Correlation of SA with PAL, ICS, and metabolites in the roots of <i>S</i>. <i>baicalensis</i> after exogenous SA treatment.

<p>Correlation of SA with PAL, ICS, and metabolites in the roots of <i>S</i>. <i>baicalensis</i> after exogenous SA treatment.</p

Correlation network in response to stress and exogenous SA treatment (Thick dashed lines indicates more high correlation.).

<p>Correlation network in response to stress and exogenous SA treatment (Thick dashed lines indicates more high correlation.).</p

PAL and ICS activity in <i>S</i>. <i>baicalensis</i> roots (A) under drought and salt stress (B) and (C) in exogenous SA treatment (n = 9, * <i>P</i><0.05, ** <i>P</i><0.01, NS: non-significant).

<p>PAL and ICS activity in <i>S</i>. <i>baicalensis</i> roots (A) under drought and salt stress (B) and (C) in exogenous SA treatment (n = 9, * <i>P</i><0.05, ** <i>P</i><0.01, NS: non-significant).</p

Alignment of the predicted protein sequence of <i>ICS</i> in <i>S</i>. <i>baicalensis</i> (the chorismate binding site is indicated in black.).

<p>Alignment of the predicted protein sequence of <i>ICS</i> in <i>S</i>. <i>baicalensis</i> (the chorismate binding site is indicated in black.).</p

Structure of baicalin and baicalein.

<p>Structure of baicalin and baicalein.</p