Dissection of the epidermal and ground tissues to uncover the LRP in rice. (A) LRP was covered by epidermal and ground tissues which disturb the observation greatly. Arrow head indicates the LRP, bar = 50 μm. (B) After dissection of covered layers, the LRP can be clearly observed under the microscope. Arrow head indicates the LRP, bar = 50 μm. (C) The arrangement of LRPs along the central cylinder cannot clearly seen in normal conditions. (D) After the removal of covered layers, the arrangement pattern and the number of LRPs can be seen clearly. Arrows indicate very closed LRP.