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Drought stress tolerance of CsALDH transgenic plants. (A) Drought stress at 0, 10, 15 days after withdrawn watering and 4 days after rewatering; (B) leaf relative water content (RWC) and soil water content (SWC) of WT and transgenic plants; (C) plant height of WT and transgenic plants; and (D) shoot biomass of WT and transgenic plants. WT, wild-type plants; CsALDH, transgenic alfalfa co-expressing bar and CsALDH. P < 0.05.
