Drought Tolerance in Two Mosses: Correlated with Enzymatic Defence Against Lipid Peroxidation

  title={Drought Tolerance in Two Mosses: Correlated with Enzymatic Defence Against Lipid Peroxidation},
  author={Rajinder S. Dhindsa and Wandekayi Matowe},
  journal={Journal of Experimental Botany},
Drought-induced changes in the activities of superoxide dismutase (SOD) and catalase, level of lipid peroxidation, and membrane permeability (solute leakage) have been studied in two mosses, the drought-tolerant Tortula ruralis and the drought-sensitive Cratoneuron filicinum. In T. ruralis the activities of SOD and catalase increase during slow drying. The level of lipid peroxidation consequently declines. On subsequent rehydration the enzyme activities decline and the level of lipid… 

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Drought Stress, Enzymes of Glutathione Metabolism, Oxidation Injury, and Protein Synthesis in Tortula ruralis.
The results show that G SSG level is a good indicator of oxidation stress and provide support to the suggestion that GSSG mediates, at least in part, the drought stress-induced inhibition of protein synthesis.
Abscisic acid modifies the changes in lipids brought about by water stress in the moss Atrichum androgynum.
The data show that mosses respond to drought stress similarly to higher plants and that ABA may reduce membrane damage by diminishing the lipid changes.
Dehydration rate determines the degree of membrane damage and desiccation tolerance in bryophytes.
In fast-dried samples, a strong signal of red autofluorescence upon rehydration is found, which correlates with an increase in ROS production and with membrane leakage, particularly the case of phenolics, which could be used as a bioindicator of oxidative stress and membrane damage.
Effects of drought stress on protective enzyme activities and lipid peroxidation in two maize cultivars.
Response of antioxidative defense system to drought stress was studied in two cultivars of maize differing in sensitivity to drought, and increase was observed in protective enzymes, MDA content and electrolyte leakage.
Effects of plant growth regulators on the antioxidant system in callus of two maize cultivars subjected to water stress
The effects of brassinolide, uniconazole and methyl jasmonate on several aspects of antioxidant defences, were studied in callus tissues of drought-resistant (PAN 6043) and drought-sensitive (SC 701)
Increased activities of superoxide dismutase and catalase are not the mechanism of desiccation tolerance induced by hardening in the moss Atrichum androgynum
While the induction of SOD appears to play a role in desiccation tolerance, a similar induction occurred in both hardened and non-hardened mosses, and induction of greater activities of enzymes that scavenge reactive oxygen species is not responsible for the added tolerance induced by hardening treatments.


PL Physiol . 59 , 295 - 300 . 1978
  • Proc . natn . Acad . Sci . U . SA .
  • 1977