Figure 1.

Regional difference of Si uptake and Lsi1 expression in rice seminal roots. A, Multicompartment transport box experiment. Excised seminal roots were placed in a box consisting of four compartments. One of the three compartments, first (0–10 mm from the root tip), second (10–20 mm), or third (20–30 mm), was exposed to a Si-containing solution individually. Si concentration in the fourth compartment (containing the cut ends) was determined at the times indicated. B, Relative Lsi1 transcript levels at each segment were measured by real-time RT-PCR. Data are means ± sd (n = 3).