Acta Physiologiae Plantarum

, Volume 33, Issue 2, pp 313–318 | Cite as

Physiological responses of two Jerusalem artichoke cultivars to drought stress induced by polyethylene glycol

Original Paper
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Abstract

Physiological responses of two Jerusalem artichoke (Helianthus tuberosus L.) cultivars with different drought sensitivity to drought stress induced by polyethylene glycol (PEG) 6000 were investigated by characterizing water status, membrane lipid peroxidation, key antioxidant enzymes activity, and proline accumulation. It was observed that the drought-tolerant Jerusalem artichoke cv. Xiuyan maintained a relatively higher water status than the drought-sensitive cv. Yulin upon drought treatments. Meanwhile, lower levels of malondialdehyde (MDA) as well as higher levels of free proline occurred in cv. Xiuyan after 36 h drought treatments. Moreover, the activities of catalase (CAT) and superoxide dismutase (SOD) in cv. Xiuyan were higher than cv. Yulin after drought stress. These results indicated that drought sensitivities actually differ between Jerusalem artichoke cv. Xiuyan and cv. Yulin, and the cv. Xiuyan was more tolerant to drought stress caused by polyethylene glycol.

Keywords

Catalase Drought stress Jerusalem artichoke Malondialdehyde Proline Superoxide dismutase Water status 
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Notes

Acknowledgments

The authors are grateful to Drs. Zhenle Yang and Mingfeng Yang for critically reading and improving the manuscript. This work was supported by Knowledge Innovation Program of the Chinese Academy of Sciences (KSCX2-YW-G-035 and KSCX2-YW-G-027-2).

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Copyright information

© Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Kraków 2010

Authors and Affiliations

  1. 1.Center for Energy Plant Research and DevelopmentInstitute of Botany, Chinese Academy of SciencesBeijingChina
  2. 2.Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdaoChina
  3. 3.Graduate University of Chinese Academy of SciencesBeijingChina

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