کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10840753 | 1067849 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Silicon alleviates oxidative damage of wheat plants in pots under drought
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کلمات کلیدی
NBTGSHNADPHAPXNADPGSSGCATPODDTPAROS - ROSnitroblue tetrazolium - tetrazolium nitroblueOxidative damage - آسیب اکسیداتیوEDTA - اتیلن دی آمین تترا استیک اسید ethylene diamine tetraacetic acid - اتیلن دیامین تتراستیک اسیدoxidized nicotinamide adenine dinucleotide phosphate - اکسید شده نیکوتین آمید آدنین دینکلوتید فسفاتDrought - خشکسالیDiethylenetriaminepentaacetic acid - دی اتیلنتریمین پنتا اسیدهای اسیدSOD - سدSuperoxide dismutase - سوکسوکس دیسموتازsilicon - سیلیسیم Peroxidase - پراکسیدازascorbate peroxidase - پراکسیداز آسکورباتیCatalase - کاتالازreduced nicotinamide adenine dinucleotide phosphate - کاهش نیکوتین آمید آدنین دینکلوتید فسفاتreduced glutathione - کاهش گلوتاتیونoxidized glutathione - گلوتاتیون اکسید شدهglutathione reductase - گلوتاتیون ردوکتازglycolate oxidase - گلیکول اکسیدازWheat (Triticum aestivum L.) - گندم (Triticum aestivum L.)Reactive oxygen species - گونههای فعال اکسیژن
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Drought-induced changes in oxidative damage to photosynthetic pigments, proteins and lipids, some enzyme activities and photosynthesis were investigated in wheat (Triticum aestivum L.) plants grown in pots applied with or without silicon under drought stress. Three treatments with three replicates were composed of “CK” (control, 2.11 mmol of sodium sulfate Kgâ1soil), “DR” (drought, 2.11 mmol of sodium sulfate Kgâ1soil) and “DSi” (drought + silicon, 2.11 mmol of sodium silicate Kgâ1soil). Drought stress was applied by maintaining 75% of relative water content in the “CK” soil and 50% of relative water content in the drought treatments (“DR” and “DSi”) for 12 days from jointing stage, after which the assays were performed on the recent fully expanded leaves. The results showed that application of silicon improved the water status of drought stressed plants. Compared with the non-silicon treatment, application of silicon increased the activities of some antioxidant enzymes: superoxide dismutase (SOD); catalase (CAT) and glutathione reductase (GR), the fatty acid unsaturation of lipids, and the contents of photosynthetic pigments and soluble proteins as well as total thiols under drought, whereas the content of hydrogen peroxide, activity of acid phospholipase (AP) and oxidative stress of proteins were decreased by applying silicon compared with those of non-silicon treatments under drought. The activities of glycolate oxidase (GO), peroxidase (POD) and ascorbate peroxidase (APX) showed no significant difference between “DR” and “DSi”. In addition, application of silicon also increased the net CO2 assimilation rate of wheat leaves under drought. It was suggested that the improvement of silicon on drought tolerance of wheat plants was associated with the increase of antioxidant defense abilities, therefore alleviating oxidative damage of cellular functional molecules induced by over produced reactive oxygen species (ROS) under drought and maintaining many physiological processes of stressed plants. The present work also suggested that silicon may be involved in metabolic or physiological activities in higher plants under drought, which coincided with previous studies in salt stressed plants.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Science - Volume 169, Issue 2, August 2005, Pages 313-321
Journal: Plant Science - Volume 169, Issue 2, August 2005, Pages 313-321
نویسندگان
Haijun Gong, Xueyi Zhu, Kunming Chen, Suomin Wang, Chenglie Zhang,