کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2181367 1095292 2008 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Carbon source-dependent variation of acquired mutagen resistance of Moniliophthora perniciosa: Similarities in natural and artificial systems
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی بیولوژی سلول
پیش نمایش صفحه اول مقاله
Carbon source-dependent variation of acquired mutagen resistance of Moniliophthora perniciosa: Similarities in natural and artificial systems
چکیده انگلیسی

The basidiomycete Moniliophthora perniciosa causes Witches’ Broom disease in Theobroma cacao. We studied the influence of carbon source on conditioning hyphae to oxidative stress agents (H2O2, paraquat, 4NQO) and to UVC, toward the goal of assessing the ability of this pathogen to avoid plant defenses involving ROS. Cells exhibited increased resistance to H2O2 when shifted from glucose to glycerol and from glycerol to glycerol. When exposed to paraquat, cells grown in fresh medium were always more resistant. Apparently glycerol and/or fresh media, but not old glucose media, up-regulate oxidative stress defenses in this fungus. For the mutagens UVC and 4NQO, whose prime action on DNA is not via ROS, change of carbon source did not elicit a clear change in sensitivity/resistance. These results correlate with expression of fungal genes that protect against ROS and with biochemical changes observed in infected cacao tissues, where glycerol and high amounts of ROS have been detected in green brooms.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fungal Genetics and Biology - Volume 45, Issue 6, June 2008, Pages 851–860
نویسندگان
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