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The Relationship Between Active Oxygen Metabolism and Resistance to Late Blight in Potato

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Abstract

The relationship between active oxygen metabolism and resistance to late blight (Phytophthora infestans) in potato (Solanum tuberosum L.) was studied for 72 h post-inoculation by comparing three resistant cultivars (low disease index) with three susceptible ones (high disease index). Activities of superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX), and the content of ascorbic acid (ASA), were higher in the resistant cultivars than in the susceptible ones. The production rate of the superoxide anion radical (O2) was lower in the resistant cultivars than in the susceptible ones. These changes, which were associated with the potato plant’s response to infection with P. infestans, provide some insight into the physiological basis of resistance and may also provide a screening tool for resistance to late blight.

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Abbreviations

ROS:

Reactive oxygen species

O2 :

Superoxide anion radical

SOD:

Superoxide dismutase

CAT:

Catalase

ASA:

Ascorbic acid

APX:

Ascorbate peroxidase

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Funding

This project was financially supported by Doctoral Research foundation of Inner Mongolia Agriculture University (BJ201312-5).

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Correspondence to Shaoying Zhang.

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Li, G., Zhang, X. & Zhang, S. The Relationship Between Active Oxygen Metabolism and Resistance to Late Blight in Potato. Potato Res. 61, 365–373 (2018). https://doi.org/10.1007/s11540-018-9391-2

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  • DOI: https://doi.org/10.1007/s11540-018-9391-2

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