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Key messageDifferent responses of photosystem I and II to chilling. Abstract Tropical crops are sensitive to chilling stress, but the underlying physiological mechanisms are unclear. We investigated the maximum quantum yield of PSII (Fv/Fm), the maximum photo-oxidizable P700 (Pm), the energy distribution in PSII, and the redox state of P700 in leaves of seedlings of three promising oilseed...