Effect of inhibitors of HDAC on callose deposition in <i>Picea wilsonii</i> pollen tube walls.

<p>(A) Control pollen tubes labeled with aniline blue. The fluorescence was distributed evenly along the tube shank, but was absent in the tip region. (B) Pollen tubes treated with 0.2% DMSO. The fluorescence distribution is consistent with that in the control. (C) Pollen tubes cultured in medium containing 0.5 μM TSA. Strong fluorescence was detected at the tip. (D) Pollen tubes cultured in medium containing 0.5 mM NaB. Bar = 50 μm.