کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2057925 1076080 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Validamycin A improves the response of Medicago truncatula plants to salt stress by inducing trehalose accumulation in the root nodules
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم زراعت و اصلاح نباتات
پیش نمایش صفحه اول مقاله
Validamycin A improves the response of Medicago truncatula plants to salt stress by inducing trehalose accumulation in the root nodules
چکیده انگلیسی

SummaryIn this work, the role of trehalose as an osmoprotectant against salt stress conditions was examined in root nodules of Medicago truncatula. For this purpose, we used validamycin A, a potent trehalase inhibitor, in order to induce trehalose accumulation. Validamycin A induced an increase of trehalose concentration in root nodules of M. truncatula by inhibiting trehalase activity; no effect on trehalose concentration was observed in roots and leaves. Trehalose accumulation was accompanied by a decrease in sucrose and starch content, indicating interference with carbohydrate partitioning in the plants. Under salinity conditions, sucrose accumulation appears to be induced in M. truncatula to protect nodule functioning by the inhibition of sucrose catabolism by sucrose synthase and alkaline invertase activities. However, trehalose accumulation induced by val A in nodules improved the response to salinity by increasing plant dry weight (PDW), and no effects of validamycin A on nitrogenase activity and PDW were observed in nonsalinized plants.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Plant Physiology - Volume 166, Issue 11, 15 July 2009, Pages 1218–1222
نویسندگان
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