Genotype-Specific Physiological Responses of Potassium-Induced Drought Tolerance in Potato: Chlorophyll Protection, Stomatal Regulation, and Proline Accumulation
Potassium (K) fertilization is a promising strategy to alleviate drought-induced photosynthetic inhibition in potato. However, cultivar-specific responses remain poorly understood. Six potato cultivars were grown under four treatments: low K, low K + drought, K application, and K application + drought. Chlorophyll cont...