FIGURE 8
3.5 The hormone content in grains
In Exp. 3, the hormone contents related to grain filling changed with time in different treatments (Figure 9). Correlation analysis indicated that the average of grain filling rate was negatively correlated with the ZR content in both superior and inferior grains (Table 2). Compared with CK, ZR content was increased by 11% in DHS treatment on the 16th DAP for superior grain (Figure 9a). It was increased by 19% in DS treatment, 20% in HS treatment and 16% in DHS treatment on the 16th DAP for inferior grain. The mean grain filling rate was positively correlated with the IAA content in superior grains on the 32th DAP. For IAA content, it was reduced by 21% in DS treatment, 26% in HS treatment and 20% in DHS treatment on the 32th DAP for superior grain (Figure 9b).