maryam madadkar Haghjou | Lorestan University (original) (raw)

Papers by maryam madadkar Haghjou

Journal of Animal and Plant Sciences, 2019

Reactive oxygen species (ROS) are generated in response to the various environmental stresses, an... more Reactive oxygen species (ROS) are generated in response to the various environmental stresses, and overproduction of ROS can lead to the lipid peroxidation, which often is monitored by measuring the malondialdehyde (MDA). Nevertheless, the extent of oxidative stress is partly dependent on the total antioxidant capacity (AOC) of plant cells. In many experiments, the assessment of oxidative stress is based on the measurement of ROS only or more commonly individual antioxidants, but a more reliable assessment of oxidative stress requires the simultaneous measurement of ROS, AOC and MDA levels. In this study, the effects of different ZnO concentrations were studied on the oxidant and antioxidant potentials, and also on MDA levels in tobacco plants. Moreover, the significant correlations were considered between the indices, which were evaluated via different methods. Results showed that both Zn deficiency and excess levels led to the increased ROS/H2O2 production, Chl a/b reduction, elec...

Frontiers in Plant Science

Due to global climate change, abiotic stresses are affecting plant growth, productivity, and the ... more Due to global climate change, abiotic stresses are affecting plant growth, productivity, and the quality of cultivated crops. Stressful conditions disrupt physiological activities and suppress defensive mechanisms, resulting in stress-sensitive plants. Consequently, plants implement various endogenous strategies, including plant hormone biosynthesis (e.g., abscisic acid, jasmonic acid, salicylic acid, brassinosteroids, indole-3-acetic acid, cytokinins, ethylene, gibberellic acid, and strigolactones) to withstand stress conditions. Combined or single abiotic stress disrupts the normal transportation of solutes, causes electron leakage, and triggers reactive oxygen species (ROS) production, creating oxidative stress in plants. Several enzymatic and non-enzymatic defense systems marshal a plant’s antioxidant defenses. While stress responses and the protective role of the antioxidant defense system have been well-documented in recent investigations, the interrelationships among plant ho...

Functional Plant Biology

Zinc oxide nanoparticles (NPs) are the third highest in terms of global production among the vari... more Zinc oxide nanoparticles (NPs) are the third highest in terms of global production among the various inorganic nanoparticles, and there are concerns because of their worldwide availability and accumulation in the environment. In contrast, zinc is an essential element in plant growth and metabolism, and ZnO NPs (nano-ZnO) may have unknown interactions with plants due to their small sizes as well as their particular chemical and physical characteristics. The present study examined the effect of nano-ZnO (25nm) and bulk or natural form (<1000nm, bulk-ZnO), compared with zinc in the ionic form (ZnSO4) on Nicotiana tabacum seedlings in a nutrient solution supplemented with either nano-ZnO, bulk-ZnO (0.2, 1, 5 and 25µM) or ZnSO4 (control) for 21 days. Results showed that nano-ZnO at most of the levels and 1µM bulk-ZnO positively affected growth (root and shoot length/dry weight), leaf surface area and its metabolites (auxin, phenolic compounds, flavonoids), leaf enzymatic activities (C...

IRANIAN JOURNALOF PLANT BIOLOGY, 2012

Acta Physiologiae Plantarum, 2022

Zīst/shināsī-i Giyāhī-i Īrān, 2015

Opposition to destructive and side effects of salt stress, have limited suitable water and soil s... more Opposition to destructive and side effects of salt stress, have limited suitable water and soil sources for plant culturing, is possible by increasing the tolerance level of seeds and seedlings. In present research, the effect of priming technique was studied with Na2SiO3 or KNO3 in 3, 6, 9 and 12 hours on Medicago sativa cv. Hamadani in response to 200 mM salt stress. Salinity caused a decrease of most of germination and growth indices from seeds and seedlings, whereas 3h-Na2SiO3 priming increased final germination percentage (FGP) and (3/6/9h)-KNO3 increased FGP, coefficient velocity of germination (CVG), compared to control. An improvement in mean germination rate (MGR) and mean germination time (MGT) was shown by 6h-Na2SiO3 and all KNO3 treatment times and increase of Vigor index (I) was observed at 3h-KNO3. Pretreatment with (3/6/9h)-Na2SiO3 and all h-KNO3 decreased T50 at stress and in non stress conditions, 9h-Na2SiO3 and 9h-KNO3 caused a decrease in mean daily germination (...

Zīst/shināsī-i Giyāhī-i Īrān, 2019

Abstract Removal of undesirable pollutants from aquatic ... more Abstract Removal of undesirable pollutants from aquatic ecosystems, which is caused by discharge of large amounts of industrial and urban pollutants into water resources, requires efficient, cost-effective and environmentally friendly technologies, such as phycoremediation. In this biological process, the physiological ability of some algal and cyanobacterial species in detoxifying pollutants such as textile dyes is used. In the present study, the ability of eukaryotic green alga Chlorella vulgaris and prokaryotic cyanobacter Spirulina platensis for decolorization of Direct Blue 129 (DB129) dye at zero (control), 20 and 60 mg. L-1 was studied during one week. Evaluations of physiological indices were performed on 1, 3 and 7 days of growth. C. vulgaris showed a higher percentage in removal efficiency than S. platensis. Dye treatment increased growth indices; Xm (maximum cell concentration), Px (cell productivity) and µm (maximum specific growth rate) and decreased td (doubling time) in C. vulgaris, compared to the control, but astaxanthin showed a higher increase in S. platensis. Chl a, Chl b and total carotenoid contents were increased in C. vulgaris alga at both concentrations of dye, and at 20 mg. L-1 in S. platensis, compared to control. Phycobilins were also increased in treated S. platensis. The highest concentration of dye (60 mg. L-1) caused the highest soluble carbohydrate production in both microorganisms. Along with an increase in dye concentration (unlike S. platensis) protein content was also increased in C. vulgaris. In general, it seems that C. vulgaris has a higher ability in decolrization and is more tolerant to DB129 dye stress than S. platensis.

Iranian Journal of Plant Biology, 2015

Drought stress is one of the major constraints for production and yield of soybean (Glycine max).... more Drought stress is one of the major constraints for production and yield of soybean (Glycine max). For this reason, identifying mechanisms associated with drought tolerance in soybean is very impotent for improving and increasing drought resistance by genetic engineering methods. In this study, the effect of drought on growth traits (plant height, fresh and dry weight of shoot and also fresh and dry weight of root) and enzyme activities of isocitrate dehydrogenase (ICDH), phosphoenolpyruvate carboxylase (PEPC), malate dehydrogenase (MDH), glutamine synthetase (GS) and nitrate reductase (NR) were assessed in drought sensitive and tolerant cultivars of soybean. The results showed that growth indicators are higher in drought tolerant cultivar under water availability (control) and water deficient when compared with those of drought sensitive cultivar. An increase in the activity of ICDH was observed in both the cultivars under drought stress as compared with their respective control plants but this activity was higher in tolerant cultivar. The activities of PEPC, MDH, GS and NR were significantly decreased in drought sensitive cultivar whereas the activities of these enzymes were higher in another cultivar. In general, the results of this study showed different behavior in the activities of assayed enzymes in two sets of soybean cultivars differing in drought tolerance and also decline of the activities of these enzymes in drought sensitive cultivar due to water deficit stress may be one of the possible reasons for decreased growth of the soybean plants under drought.

Plant Physiology and Biochemistry, 2014

Nano and bulk-forms of zinc oxide (ZnO) are used extensively in industry and consequently may acc... more Nano and bulk-forms of zinc oxide (ZnO) are used extensively in industry and consequently may accumulate in the environment. However, there is little information available on the comparative effects of these forms during the critical early stages of plant life. Furthermore, the role of chelating agents, which affect the bioavailability of metals, in ameliorating plant stress due to exposure to nano and bulk-forms of ZnO is not well characterised. In this study, the effects of different concentrations (0.5, 2.5, 5, 10, 50 and 100 ppm) of nano ZnO (22 nm) and bulk ZnO (natural form, 1000 nm) with and without organic (citrate) and inorganic (EDTA) chelators on germination and seedling growth, and oxidative stress markers of Nicotiana tabacum L. were compared. Chelators (without ZnO) enhanced root growth, whilst ZnO negatively affected seedling growth. ZnO toxicity was often mitigated by adding chelators, especially citrate, although at the highest levels (50 and 100 ...

Abstract: The photosynthetic and respiratory behaviors of two Dunaliella salina strains (IR-1 and... more Abstract: The photosynthetic and respiratory behaviors of two Dunaliella salina strains (IR-1 and Gh-U) were investigated at two temperature treatments and two assay temperatures. Net photosynthetic rate (P N), photonsaturated net photosynthetic rate (P Nmax), irradiance required to Saturate Photosynthetic (SI), respiration and pigment changes in D. salina strains, containing different chlorophyll (Chl) contents, shifted from 28 to 13°C for 24 h were compared with controls kept at 28°C, at two assay temperatures (28 and 13°C). Cold stress produced a decrease in total Chl content of IR-1 (higher Chl strain) whereas, Gh-U (lower Chl strain) did not exhibit significant changes under low temperature condition in total Chl. Carotenoid showed a larger decrease in IR-1 compared to that in Gh-U under treatment conditions. P N, P Nmax, SI and respiration rate were higher in IR-1 than those in Gh-U, which had a higher carotenoid/total chlorophyll ratio than IR-1, at all conditions. Transferri...

By comparison between two Dunaliella species, differing in B-carotene accumulation potential, the... more By comparison between two Dunaliella species, differing in B-carotene accumulation potential, the interrelationship between B-carotene and ABA production was investigated. Both D. salina MUR8 and D. viridis MUR29 (as higher and lower B-carotene accumulators, respectively) responded to salt-stress by an increase in ABA levels at initial hours after the imposition of hypersaline stress. But ABA enhancement was considerably higher in D. salina than that in D. viridis. The high level of ABA was transient in stressed D. salina and it had returned near to basal levels, but remained higher than control. In contrast to ABA levels, B-carotene content declined at the point of ABA enhancement in D. salina but not in D. viridis. After 24 hours exposure to salt stress, B-carotene accumulation was observed in D. salina. There were no significant changes of B-carotene in D. viridis. These results showed that D. salina appears more capable to response to salt stress by producing higher levels of AB...

D. bardawil تظّغ ضز ،ٝیٛؾ ٚز طٞ یاطث سقض خط٘ ٗیطتلابث ٚ ٜزٛث 5 / 0 ی٘غٚطتی٘ غجٙٔ ضز ٚ هٕ٘ ضلاٛٔ K... more D. bardawil تظّغ ضز ،ٝیٛؾ ٚز طٞ یاطث سقض خط٘ ٗیطتلابث ٚ ٜزٛث 5 / 0 ی٘غٚطتی٘ غجٙٔ ضز ٚ هٕ٘ ضلاٛٔ KNO3 فٞبو طثوا .سق ٜسٞبكٔ ضز بٞ ظٚض 8 ٖٛٔظآ ْا ا ٚ سیزطٌ ٜسٞبكٔ بٞ ُیفٚطّو طیزبمٔ فیاعف یبٞ a ، b ضبٕیت ضز ُو ُیفٚطّو ٚ KNO3 تظّغ ضز ( هٕ٘ طتلابث یبٞ 5 / 0 ٚ 3 )ضلاٛٔ ٖاظٚا ٗیطتٕو .سق ٜسٞبكٔ تظّغ ضز طت 5 / 0 ضبٕیت .سق ٜسٞبكٔ زبیظ ٓیؿمت تػطؾ بث ضلاٛٔ NH4Cl َّٛؾ سقض تػطؾ فٞبو تجؾ ٚز ضز بٞ تظّغ 1 / 0 ٚ 3 ٝیٛؾ ضز ٓتكٞ ظٚض ضز ضلاٛٔ D. bardawil فٞبو بٔا .سیزطٌ ُیفٚطّو ٖاعیٔ ضز ٝیٛؾ ٚز طٞ ضز ٝخٛت ُثبل یبٞ یبٞ a ، b ُیفٚطّو ، تظّغ یٙؼی طتكیث یضٛق ضز بفطن ،ٗیئتٚطپ سیسق فیاعفا ٜاطٕٞ ٝث ُو سیئٛٙتٚضبو ٚ ٗتٚضبوبتث ،ُو M 3 ٝخٛت ُثبل فیاعفا .سق ٜسٞبكٔ هٕ٘ ٝ٘اسٍ٘ض ٝیّو ٝث ٓتكٞ ظٚض ظا ٗیئتٚطپ ٚ بٞ ضبٕیت .سیزطٌ ٜسٞبكٔ ضٛوصٔ تظّغ ضز سؼث KNO3+NH4Cl ، َّٛؾ تیؼضٚ زٛجٟث تجؾ ٝث تجؿ٘ بٞ ضبٕیت NH4Cl دؾبپ تٚبفت ٜسٔآ تؾسث حیبت٘ ؼبؾا طث .سق ضز ی٘غٚطتی٘ غثبٙٔ ٝث بٞ D. bardawil فیاعفا ٚ ٜزٛث طتكیث ی٘اطیا ٝیٛؾ ظا ، یذطث ضز بٞ ضز ٝیٛؾ ٗیا ضز ٜسق یطیٌ ٜظاس٘ا تبجیوطت ظٚض 16 یٔ ٝظحلأ سقض ْا یٔ طظ٘ ٝث یّو ضٛغث .زٛق َّٛؾ ْٛی٘...

The photosynthetic and respiratory behaviors of two Dunaliella salina strains (IR-1 and Gh-U) wer... more The photosynthetic and respiratory behaviors of two Dunaliella salina strains (IR-1 and Gh-U) were investigated at two temperature treatments and two assay temperatures. Net photosynthetic rate (P ), photon- N saturated net photosynthetic rate (P ), irradiance required to Saturate Photosynthetic (SI), respiration and Nmax pigment changes in D. salina strains, containing different chlorophyll (Chl) contents, shifted from 28 to 13°C for 24 h were compared with controls kept at 28°C, at two assay temperatures (28 and 13°C). Cold stress produced a decrease in total Chl content of IR-1 (higher Chl strain) whereas, Gh-U (lower Chl strain) did not exhibit significant changes under low temperature condition in total Chl. Carotenoid showed a larger decrease in IR-1 compared to that in Gh-U under treatment conditions. P , P , SI and respiration rate were higher in IR-1 N Nmax than those in Gh-U, which had a higher carotenoid/total chlorophyll ratio than IR-1, at all conditions. Transferring t...

A sensitive, relatively selective and semi-automated microextraction by packed sorbent (MEPS) met... more A sensitive, relatively selective and semi-automated microextraction by packed sorbent (MEPS) method was developed for the spectrophotometric determination of nitrofurantoin (NFT) in urine samples using a green sorbent. Chlorella vulgaris, a unicellular green microalgae, was used for the first time, as a biosorbent in the developed MEPS method. Effects of several factors such as sample volume, eluent volume, sample pH and no. of extraction cycles (draw-ejects) on the performance of the method were carefully studied. It was found that NFT is quantitatively enriched on the packed syringe from a sample adjusted on pH 8, after 14 draw-eject cycles. This procedure was easily performed by a designed reciprocating apparatus. After washing the sorbent for removing matrix interferences, the analyte was eluted by 30% acetone in water as eluent. Under the optimized conditions, a detection limit of 0.039 mg L-1 and a linear calibration curve with an R2 of 0.997 was obtained for NFT determinatio...

Plant Biotechnology Reports

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