Red cabbage sections treated with 0.5 M sucrose showed a slight increase in tolerance on exposure to drought. This was so small that it may simply represent a removal of injury due to excess turgor in distilled water. Drought tolerance was markedly increased by mercaptoethanol (ME), but not by glutathione. Sulfhydryl reagents (PCMB and NEM) were unable to enhance drought tolerance unless replaced by ME during rehydration.
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Paricha et al. (1967) studied this question.
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