Drought‑Smart Sorghum: How Photosynthesis Helps Plants Stay Dry

Sorghum plants in central Arizona were watched for seven weeks while the soil dried out. Scientists measured how much water the plants used, looked at their genes, and checked for stress signals. They found a group of genes that act together when the plants are thirsty. One gene, called SbCDF2/3L, sits at the center of this group and is a key regulator. The genes in this group are involved in photosynthesis, the process that turns light into energy.

Plants that survive drought keep these genes active for longer than plants that fail. When researchers looked at a separate set of sorghum varieties, the same pattern appeared: drought‑tolerant plants had higher activity of SbCDF2/3L and the photosynthesis genes. These findings suggest that boosting this gene network could make sorghum more drought‑resistant and increase crop yield in hot, dry areas.

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