Effects of herbicide stress on wheat cultivars from organic and conventional cropping systems |
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Authors: | Marja Uotila Tamás Kömives |
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Institution: | 1. Department of Ecology and Systematics , University of Helsinki , POB 7, Helsinki, SF‐00014, Finland;2. Plant Protection Institute , Hungarian Academy of Science , POB 102, Budapest, H‐1525, Hungary |
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Abstract: | Abstract Wheat (Triticum aestivum L.) seedlings grown from seeds produced in “organic”; (non‐chemical) and “conventional”; cropping systems are characterized by a) similar rates of root and shoot growth, b) equal sensitivity to phytotoxicity by the herbicide glyphosate, and c) equivalent basal activity of the enzyme glutathione S‐transferase (both in the roots and in the shoots). In addition, treatment of these seedlings with glyphosate leads to significantly higher contents of this enzyme both in the shoots and in the roots. However, time‐course and dose‐response investigations indicate significant differences in the induction pattern of glutathione S‐transferase: the response of “conventional”; wheat seedlings takes place earlier and with higher efficiency, than that of the “organic”; ones. |
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Keywords: | herbicide stress gene activation glutathione S‐transferase glyphosate organic farming wheat |
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