Reduced expression of <i>HST</i> results in an early flowering phenotype.

<p>(<b>A</b>) Typical 22-day-old <i>pds2-1</i> and WT seedlings. Black arrows indicate floral structures on bolting <i>pds2-1</i> plants. (<b>B</b>) Onset of early flowering in three <i>pds2-1</i> plants compared with WT plants. (<b>C</b>) Anti-HST early flowering phenotype. (<b>D</b>) Expression analysis by qRT-PCR of genes involved in regulating flowering time in <i>pds2-1</i> plants. Significant differences of the means (± SD) between WT plants and <i>pds2-1</i> plants (n = 3) are indicated by * (P≤0.05). The Arabidopsis <i>TUB2</i> gene was used as an internal control. <i>FLC</i>: <i>Flowering Locus C</i>; <i>GI</i>: <i>Gigantea</i>; <i>CO</i>: <i>Constans</i>; <i>SOC1</i>: <i>Supressor of Overexpression of Constance1</i>.