FIGURE 7 Effects of drought stress on the root traits of ”Guoxin 02” and ”Ji 228”. (A) Representative images of root traits of the two varieties at 5d, 10d and 15d after drought stress. Statistical analysis of the (B) total root length, (C) root dry weight, (D) specific root surface area, (E) root volume, (F) average diameter, (G) root tissue density, (H) taproot length, (I) average length-lateral roots, (J) Average length- all root, (K) lateral root angle, (L) lateral root count, and (M) convex hull area. DT type, Drought-tolerant type ”Guoxin 02”; DS type, Drought-sensitive type ”Ji 228”. NS, no-stress; DS, drought stress; C, varieties; D, drought. Error bars represent standard errors of the means. P <0.05, significant difference (*);P <0.01, highly significant difference (**).