What question did this study set out to answer?

To determine the relationship between ozone tolerance and the ascorbate-dependent hydrogen peroxide scavenging system in chloroplasts across different spinach cultivars.

October 1, 1985Plant and Cell Physiology

O3 Tolerance and the Ascorbate-Dependent H2O2 Decomposing System in Chloroplasts

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Authors

KTKiyoshi TanakaKitasato University YSYoshiko SUDAShinshu University NKNoriaki KondoShiga University

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Implication

Experimental study demonstrates that antioxidant levels and ascorbate peroxidase activity confer ozone tolerance in spinach, suggesting chloroplast scavenging systems detoxify active oxygen.

Key Points

To determine the relationship between ozone tolerance and the ascorbate-dependent hydrogen peroxide scavenging system in chloroplasts across different spinach cultivars.
Fumigated spinach plants with high (0.5 ppm) and low (0.1 ppm) concentrations of ozone.
Measured concentrations of ascorbate, glutathione, and protective antioxidant enzymes across six spinach cultivars displaying different ozone sensitivities.
Exposure to 0.5 ppm ozone rapidly depleted ascorbate within hours, with highly tolerant cultivars ('King of Denmark' and 'Touko') maintaining higher baseline ascorbate and glutathione levels than sensitive cultivars despite similar protective enzyme levels.
Fumigation with 0.1 ppm ozone induced an increase in ascorbate peroxidase activity within several days without producing visible leaf injury.

Cite This Study

Tanaka et al. (1985) studied this question.

synapsesocial.com/papers/6a6fef43439bab0cabc2f55f https://doi.org/10.1093/oxfordjournals.pcp.a077043

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Implication

Experimental study demonstrates that antioxidant levels and ascorbate peroxidase activity confer ozone tolerance in spinach, suggesting chloroplast scavenging systems detoxify active oxygen.

O3 Tolerance and the Ascorbate-Dependent H2O2 Decomposing System in Chloroplasts

Discussion

Member takes

Implication

Key Points

Cite This Study

O3 Tolerance and the Ascorbate-Dependent H2O2 Decomposing System in Chloroplasts

Discussion

Member takes

Implication

Key Points

Cite This Study

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