Fig. 1

a qRT-PCR analysis showing OsICL gene expression levels in the whole shoots, b young leaves and c senesced leaves of the three transgenic rice over-expressing OsCam1–1 (L1, L2, L7) and WT under non-stress and salt stress at 150 mM NaCl for 4 h (N = 4). The relative expression of the whole shoots was compared using whole shoots of WT under non-stress as base line, and the relative expression level of the young and senesced leaves was compared using young leaves under non-stress as baseline. One-way ANOVA with Duncan multiple range test with criteria of p < 0.05 was separately applied for statistical data analysis of whole shoots, young leaves, and senesced leaves. Data are shown as the mean ± 1 SD, and means with the same letter are not significantly different