کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2015948 | 1541947 | 2014 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
How sensitive is Melissa officinalis to realistic ozone concentrations?
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کلمات کلیدی
TBARSPSIRuBPPFDRuBisCOTPUPSIITBAPSII photochemistryVPDLHCPsVcmaxMDAFBEdbpAPPFDDEPsRWCQNPABAF0′ITEAmaxDABΦPSII3,3′-diaminobenzidine - 3،3'-diaminobenzidineBSA - BSAFm′ - Fm 'Fv/Fm - Fv / Fmribulose-1,5-bisphosphate carboxylase/oxygenase - Ribulose-1،5-Bisphosphate کربوکسیلاز / Oxygenasebovine serum albumin - آلبومین سرم گاوenzyme linked immunosorbent assay - آنزیم تست ایمونوسیورسانس مرتبط استAsat - اساتabscisic acid - اسید آبسزیکThiobarbituric acid - اسید تیوباربیتوریکLemon balm - بادرنجبویهQuantum efficiency - بازده کوانتومیPhotosynthetically active radiation - تابش فعال فتوسنتزیANOVA - تحلیل واریانس Analysis of varianceone-way analysis of variance - تحلیل واریانس یک راههphoton flux density - تراکم شار فوتونELISA - تست الیزاOxidative stress - تنش اکسیداتیوPar - توسطJmax - جماکسmaximal fluorescence - حداکثر فلورسانسNon-photochemical quenching - خنک سازی غیر فتوشیمیاییstomatal conductance to water vapor - رطوبت دهان به بخار آبRelative humidity - رطوبت نسبیPhotochemical quenching - رفع عکس شیمیاییribulose 1,5-bisphosphate - ریوبولوز 1،5-بیسفسفاتApparent quantum yield - عملکرد کوانتومی ظاهریphotosystem I - عکس سیستم منintercellular CO2 concentration - غلظت CO2 بین سلولیPhotosynthesis - فتوسنتزphotosynthetic photon flux density - فتوسنتز تراکم شار فوتونPhotosystem II - فتوسیستم 2minimal fluorescence - فلورسانس حداقلmalondialdehyde - مالون دی آلدهیدRelative water content - محتوای آب نسبیthiobarbituric acid reactive substances - مواد واکنش پذیر اسید تیوباربیتوریکtranspiration rate - نرخ تنفسCafé - کافهMembrane integrity - یکپارچگی غشاء
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Lemon balm (Melissa officinalis, L.; Lamiaceae) was exposed to realistic ozone (O3) dosages (80Â ppb for 5Â h), because high background levels of O3 are considered to be as harmful as episodic O3 regimes. Temporal alterations of different ecophysiological, biochemical and structural parameters were investigated in order to test if this species can be considered as an O3-bioindicator regarding changes in background concentrations. At the end of ozone exposure, the plants did not exhibit any visible foliar symptoms, as only at microscopic level a small number of dead cells were found. Photosynthetic processes, however, were significantly affected. During and after the treatment, ozone induced a reduction in CO2 fixation capacity (up to 52% after 12Â h from the beginning of the treatment) due to mesophyllic limitations. Intercellular CO2 concentration significantly increased in comparison to controls (+90% at the end of the post-fumigation period). Furthermore impairment of carboxylation efficiency (â71% at the end of the post-fumigation period compared to controls in filtered air) and membrane damage in terms of integrity (as demonstrated by a significant rise in solute leakage) were observed. A regulatory adjustment of photosynthetic processes was highlighted during the post-fumigation period by the higher values of qNP and (1-qP) and therefore suggests a tendency to reduce the light energy used in photochemistry at the expense of the capacity to dissipate the excess as excitation energy. In addition, the chlorophyll a/b ratio and the de-epoxidation index increased, showing a rearrangement of the pigment composition of the photosynthetic apparatus and a marked activation of photoprotective mechanisms.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Physiology and Biochemistry - Volume 74, January 2014, Pages 156-164
Journal: Plant Physiology and Biochemistry - Volume 74, January 2014, Pages 156-164
نویسندگان
Anne Sarah Döring, Elisa Pellegrini, Alessandra Campanella, Alice Trivellini, Clizia Gennai, Maike Petersen, Cristina Nali, Giacomo Lorenzini,