Habituation to thaxtomin A in hybrid poplar cell suspensions provides enhanced and durable resistance to inhibitors of cellulose synthesis |
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Authors: | Viviane Brochu Marie Girard-Martel Isabelle Duval Sylvain Lerat Gilles Grondin Olivier Domingue Carole Beaulieu Nathalie Beaudoin |
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Institution: | 1.Natural Resources Canada, Canadian Forest Service,Pacific Forestry Centre,Victoria,Canada V8Z 1M5;2.Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre,Québec,Canada G1V 4C7;3.Centre SèVE, Département de biologie, Faculté des Sciences,Université de Sherbrooke,Sherbrooke,Canada J1K 2R1 |
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Abstract: | Background Thaxtomin A (TA), a phytotoxin produced by the phytopathogen Streptomyces scabies, is essential for the development of potato common scab disease. TA inhibits cellulose synthesis but its actual mode of action
is unknown. Addition of TA to hybrid poplar (Populus trichocarpa x Populus deltoides) cell suspensions can activate a cellular program leading to cell death. In contrast, it is possible to habituate hybrid
poplar cell cultures to grow in the presence of TA levels that would normally induce cell death. The purpose of this study
is to characterize TA-habituated cells and the mechanisms that may be involved in enhancing resistance to TA. |
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