کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10840156 | 1067579 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of different cultivation temperatures on plasma membrane ATPase activity and lipid composition of sugar beet roots
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کلمات کلیدی
DGDGTAGH+ATPaseArrhenius analysisDTTphosphatidic acid - اسید فسفاتیدیکFree fatty acids - اسیدهای چرب آِزادActivation energy - انرژی فعال سازیtriacylglycerol - تری آسیل گلیسرول Temperature - دماdiacylglycerol - دیسیل گلیسیرینdigalactosyl diacylglycerol - دیگالاکتوزیل دیسیل گلیسرولdithiothreitol - دیتیوتریتولDAG - روزPlasma membranes - غشای پلاسماinorganic phosphate - فسفات معدنیphosphatidylcholine - فسفاتیدیل کولینphosphatidylglycerol - فسفاتیدیل گلیسرولphosphatidylethanolamine - فسفاتیدیلتانولامینPhospholipid - فسفولیپیدUnsaturation - نارساییpolyethylene glycol - پلی اتیلن گلیکولPEG - پلیاتیلن گلیکول Lipids - چربیهاSugar beet - چغندر قند
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Sugar beet seedlings (Beta vulgaris L. cv. Monohill) were cultivated for 3 weeks at different root and shoot temperatures and the plasma membranes (PM) from roots were purified by aqueous two-phase partitioning and analyzed for lipid composition and ATPase activities. Lipid analyses, undertaken immediately after PM purification from the roots, showed that a low root zone temperature (10 °C) decreased the ratio between the major lipids phosphatidylcholine (PC) and phosphatidylethanolamine (PE). A low temperature in the root environment increased the mol% of PE and decreased the mol% of phosphatidic acid (PA), independent on the shoot growth temperature. A low temperature also decreased the mol% of linoleic acid (18:2) and increased mol% of linolenic acid (18:3) in the analyzed lipid classes, especially in PC and PE. The ratio between acyl chain lipids and protein generally increased in PM from roots grown at 10 °C, compared with higher temperature. The changes in lipid composition correlated with changes in ATPase activities, detected as hydrolyses of MgATP. The kinetic parameters, Km and V of the PM H+ATPase in roots increased at a low cultivation temperature, independent on shoot temperature. Moreover, Arrhenius analyses showed that the transition temperature was independent of both root or shoot growth temperature at 10-24 °C, whereas the activation energy of the ATPase was dependent on the growth temperature of the root, and independent on shoot temperature. Thus, acclimation processes can take place in roots, irrespective of the shoot temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Physiology and Biochemistry - Volume 43, Issue 3, March 2005, Pages 261-268
Journal: Plant Physiology and Biochemistry - Volume 43, Issue 3, March 2005, Pages 261-268
نویسندگان
Sylvia Lindberg, Antoni Banas, Sten Stymne,