图3.

CTK浓度与硝酸盐还原酶活性的关系在很好的情况下（一个）罚款（B.）根源Gossypium hirsutum。细根是直径在0.1和2mm之间的细根，而具有小于0.1mm的直径的非常细的根。回归模型是NR = 2.54×CTK - 19.34（R.² = 0.54,P. < 0.001) and NR = 44.29 – 1.58 × CTK (R.² = 0.49,P. < 0.002) for the very fine and fine roots, respectively