Relative transcript abundance of <i>GmNAC003</i> and <i>GmNAC004</i> in response to water stress.

<p>Transcript abundance was quantified using qRT-PCR and the data were normalized to the four best internal control genes (<i>CYP2, IDE, UNK1</i> and <i>UNK2</i>) based on the M stability of GeNorm analysis. Mean relative expression levels were transformed to a value of 1 for the sample having lowest expression. Error bars are standard errors of the means from three replications. (A) Response to water deficit stress. Plants at the 2-leaf (V2) growth stage were allowed to grow without supply of additional water until desired stem water potentials were achieved. V2, V3 and V6 are the growth stages of the control plants corresponding to the time when water stressed-plants were sampled. (B) Response to dehydration stress. V2 growth stage plants were harvested and allowed to dehydrate in a growth chamber for the designated times.