Figure 2.

Expression profiles of CsMTL2 in the roots, stems, and leaves of cucumber grown under Zn²⁺ and Cd²⁺ stress. CsMTL2 expression in the roots, steams, and leaves of cucumber plants grown in the presence of different concentrations of Zn²⁺ (A,C,E) and Cd²⁺ (B,D,F) for the indicated periods, as detected by quantitative reverse transcription-polymerase chain reaction (qRT-PCR). Values represent the mean ± standard deviation (SD) of three biological replicates, with three technical replicates for each organ. Statistical significance was based on Student’s t-test ^*: p < 0.05; ^**: p < 0.01.