图22.1 Many factors determine how plants respond to environmental stress: the genotype and development circumstances of the plant, the duration and severity of the stress, the number of times the plant is subjected to stress, and any additive or synergistic effects of multiple stresses. Plants response to stress through a variety of mechanisms. Failure to compensate for a severe stress can result in plant death.图22.1 Many factors determine how plants respond to environmental stress: the genotype and development circumstances of the plant, the duration and severity of the stress, the number of times the plant is subjected to stress, and any additive or synergistic effects of multiple stresses. Plants response to stress through a variety of mechanisms. Failure to compensate for a severe stress can result in plant death