کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2015657 | 1541937 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Pb-induced responses in Zygophyllum fabago plants are organ-dependent and modulated by salicylic acid
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کلمات کلیدی
DHARmonodehydroascorbateMDAmonodehydroascorbate reductaseSAGdehydroascorbateNPTChlTBARSGSSGMDHARdehydroascorbate reductaseAPXPSIIGSHphytochelatinsASATBACATROS - ROSAscorbic acid - آسکوربیک اسیدAlkaloids - آلکالوئیدLead stress - استرس سربThiobarbituric acid - اسید تیوباربیتوریکSalicylic acid - اسید سالیسیلیکMdha - بزرگترCellular redox state - حالت دولومیت سلولیDHA - دوکوساهگزائنوئیک اسیدSOD - سدSuperoxide dismutase - سوکسوکس دیسموتازPhotosystem II - فتوسیستم 2malondialdehyde - مالون دی آلدهیدthiobarbituric acid-reacting substances - مواد واکنش دهنده تیوباربیتوریک اسیدPRO - نرم افزارHeavy metal - هوی متال، فلز سنگینascorbate peroxidase - پراکسیداز آسکورباتیNon-protein thiols - پروتئین غیر پروتئینیProline - پرولینCatalase - کاتالازChlorophylls - کلروفیلGlutathione - گلوتاتیونoxidized glutathione - گلوتاتیون اکسید شدهglutathione reductase - گلوتاتیون ردوکتازReactive 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
Zygophyllum fabago is a promising species for restoring heavy metal (HM) polluted soils, although the mechanisms involved in HM tolerance in this non-model plant remain largely unknown. This paper analyses the extent to which redox-active compounds and enzymatic antioxidants in roots, stems and leaves are responsible for Pb tolerance in a metallicolous ecotype of Z. fabago and the possible influence of salicylic acid (SA) pretreatment (24 h, 0.5 mM SA) in the response to Pb stress. SA pretreatment reduced both the accumulation of Pb in roots and even more so the concentration of Pb in aerial parts of the plants, although a similar drop in the content of chlorophylls and in the maximum quantum yield of photosystem II was observed in both Pb- and SA-Pb-treated plants. Pb increased the endogenous free SA levels in all organs and this response was enhanced in root tissues upon SA pretreatment. Generally, Pb induced a reduction in catalase, ascorbate peroxidase and glutathione reductase specific activities, whereas dehydroascorbate reductase was increased in all organs of control plants. SA pretreatment enhanced the Pb-induced H2O2 accumulation in roots by up-regulating Fe-superoxide dismutase isoenzymes. Under Pb stress, the GSH redox ratio remained highly reduced in all organs while the ascorbic acid redox ratio dropped in leaf tissues where a rise in lipid peroxidation products and electrolyte leakage was observed. Finally, an organ-dependent accumulation of proline and β-carboline alkaloids was found, suggesting these nitrogen-redox-active compounds could play a role in the adaptation strategies of this species to Pb stress.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Physiology and Biochemistry - Volume 84, November 2014, Pages 57-66
Journal: Plant Physiology and Biochemistry - Volume 84, November 2014, Pages 57-66
نویسندگان
Antonio López-Orenes, Ascensión MartÃnez-Pérez, Antonio A. Calderón, MarÃa A. Ferrer,