Figure 5.
Variation of SPAD readings at different positions of 20 leaves collected from plants grown under light N deficiency (150 kg N ha−1) at panicle initiation growth stage. WYJ-24, the abbreviation of a Japonica rice hybrid Wuyunjing-24. YLY-1, the abbreviation of an Indica rice hybrid Yliangyou-1. The SD (standard deviation) of the first (A,E), second (B,F), third (C,G), and fourth (D,H) fully expanded leaves from top (LFT1-4) were compared at different measurement positions. a–c are leaf positions at the 1/3, 1/2, and 2/3 of the distance from the leaf base, respectively. ab, bc, ac and abc are combinations of the corresponding a–c positions.