Journal
JOURNAL OF PLANT INTERACTIONS
Volume 9, Issue 1, Pages 259-266Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/17429145.2013.820359
Keywords
ascorbate peroxidase; catalase; combined stress; copper; Fusarium culmorum; peroxidase
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The effect of stress combinations on plants cannot be extrapolated from the response to each of the applied stressors. Greenhouse experiments were carried out on soil to which copper ions were introduced at four concentrations (0, 150, 400, and 600 mg kg(-1)). Copper treatments without or with Fusarium infection were established. Both stress factors, applied separately or together inhibited growth with the exception of the lowest Cu concentration, which stimulated growth of healthy plants. Depending on concentration, Cu did not change or increased the activity of root peroxidase and leaf catalase, and decreased ascorbate peroxidase (APO) activity in leaves and roots. Infection increased the activities of the enzymes with exception of root APO. The simultaneous presence of these two stress factors modified their individual effects. Generally, the stress combination aggravated the plant status though an opposite trend was observed in some cases.
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