The AgNPs of all sizes at 10mg/L did not show any significant
effects on both the shoot and root fresh weights of 21-day old seedlings (Fig. 3C andE),although the numerical trend was to
reduce the fresh weight with increasing AgNP sizes.
Moreover,
the addition of AgNPs of any size decreased the dry weight ,plant
height and root length (Fig. 3D, F–H), and so revealed the negative
effects of AgNP sizes on rice seedling growth.