Elemental analysis of soil-grown wild-type (WT) and siz1-2 plants. Determination of metal elements was done in the leaves of 3-week-old, soil-grown wild-type and siz1-2 plants by ICP-OES. Means and error bars were calculated from three repeats (** P < 0.01). Al, Aluminum; Ca, calcium; Cr, chromium; DW, dry weight; Mo, molybdenum; Na, sodium; P, phosphorus.