Barely Significant

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The contents of Cr, Cu, As, Pb and Zn in MLS were significantly exceeded those in MLZ and MLX, which reason was that long-term storage of CG due to weathering and rainwater leaching promoted the activity of harmful heavy metals in CG, some of them were dissolved into the water body or soil with precipitation and infiltration, continued to migrate and enrich, resulting in the increase of heavy metal content in the soil [ 13 , 14 ], and it showed a decreasing trend with the increase distance from CG dump [ 19 , 22 ], aligning with observations by Lu et al.
However, 48 hours treatment later, the GUS activity of the transgenic plants under the darkness treatment showed obvious increase by 26% when compared with that of the control, and the transgenic plants under the low temperature treatment exhibited the extraordinarily significant increase of GUS activity by about 14-fold comparing with the control ( Fig 4 ).