Wyniki wyszukiwania

1

Plant growth and yield as affected by environmental factors

100%

Iqbal M.

Polish Journal of Natural Sciences. Supplement

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2003

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tom 01

2

Alleviation of salinity-induced perturbations in ionic and hormonal concentrations in spring wheat through seed preconditioning in synthetic auxins

84%

Iqbal M., Ashraf M.

Acta Physiologiae Plantarum

|

2013

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tom 35

|

nr 04

The experiments were conducted to examine the effects of seed priming in solutions (100, 150 and 200 mg L-1) of different synthetic auxins, i.e., 2,4- dichlorophenoxyacetic acid (2,4-D), 2,4,5-trichlorophenoxyacetic acid (2,4,5-T), α-naphthaleneacetic acid (NAA) on growth, grain yield, gaseous exchange characteristics, ionic and hormonal concentrations in two spring wheat (Triticum aestivum L.) cultivars MH-97 (salt intolerant) and Inqlab-91 (salt tolerant). The primed (soaked for 12 h) and non-primed seeds were sown in Petri plates in a growth room as well as in a field treated with 150 mM NaCl. Generally, all synthetic auxins did not increase germination percentage and rate in both cultivars when compared with hydropriming (control), and even decreased these attributes when applied at higher concentrations (200 mg L-1). Nonetheless, under salt stress, NAA (150 mg L-1) was most effective in increasing seedling shoot dry weight, fertile tillers per plant, number of grains per ear and grain yield in both cultivars. The plants raised from seed treated with NAA (150 mg L-1) had lower shoot [Na+] in the salt intolerant cultivar. Moreover, NAA treatment improved root [Ca2+] in both cultivars. Priming agents affected leaf free indole-3-acetic acid (IAA) and indole-3-butyric acid (IBA) concentrations differently in both cultivars. Treatment with NAA (150 mg L-1) lowered leaf free abscisic acid (ABA) and putrescine (Put) concentrations and raised salicylic acid (SA) and spermidine (Spd) concentrations in the salt intolerant cultivar. In conclusion, pre-treatment with NAA (150 mg L-1) showed consistent promotive effects on growth and grain yield in the two cultivars, which were partially attributed to the beneficial effects of NAA-priming on ionic and hormonal homeostasis under salt stress.

3

Strategies toward optimization of cultural conditions of Porphyridium cruentum for higher polysaccharide production

84%

Iqbal M., Zafar S. I.

Acta Microbiologica Polonica

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1993

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tom 42

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nr 1

4

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Phytochemical analysis, antioxidant and anticancer activity of Aerva javanica growing in district Karak, Khyber Pakhtunkhwa Pakistan

68%

Afzal S., Khan S., Iqbal M., Akhtar A.

Acta Biologica

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2021

|

tom 28

5

Effect of presowing magnetic treatment on properties of pea

68%

Iqbal M., Haq Z. U., Jamil Y., Ahmad M. R.

International Agrophysics

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2012

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tom 26

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nr 1

The pea seeds were exposed to full-wave rectified sinusoidal magnetic fields. The effects of electromagnetic treatment on seedling growth and chlorophyll contents and have been investigated. Seed were sown after magnetic field treatment according to ISTA under controlled laboratory conditions. The magnetic filed treatment of seeds increased the growth significantly (P<0.05), while the increment in contents of chlorophyll have been found non significant (P<0.05). The shoot length, root length, root dry mass, shoot dry mass, fresh root mass and fresh shoot mass increased up to 140.5, 218.2, and 104, 263.6, 74.5, 91.3%, respectively. The result suggested that magnetic field could be used to enhance the growth in pea plant.

6

Antioxidant response of Cassia angustifolia Vahl. to oxidative stress caused by Mancozeb, a pyrethroid fungicide

68%

Majid U., Mahmooduzzafar, Siddiqi T. O., Iqbal M.

Acta Physiologiae Plantarum

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2014

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tom 36

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nr 02

Seeds of Cassia angustifolia Vahl., treated with various concentrations (0, 0.1, 0.15, 0.2 and 0.25 %) of Mancozeb, a broad-spectrum contact fungicide, were sown in field conditions to study the effect of the treatments on lipid peroxidation, proline accumulation and modulation of antioxidant system of seedlings obtained. Significant increase over the control was observed in treated plants for thiobarbituric acid-reactive substances content (up to 207 %), proline content (96 %) and total glutathione content (144 %), whereas the total ascorbate content decreased by 44 %. Increased enzymatic activity was recorded for ascorbate peroxidase (63 %), glutathione reductase (154 %) and superoxide dismutase (109 %), whereas catalase activity decreased by 58 % with 0.25 % Mancozeb treatment. The changes observed were dose-dependent, showing a strong correlation with the level of treatment.

7

Exogenous menadione sodium bisulfite mitigates specific ion toxicity and oxidative damage in salinity-stressed okra (Abelmoschus esculentus Moench)

68%

Ashraf M. A., Asma H. F., Iqbal M.

Acta Physiologiae Plantarum

|

2019

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tom 41

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nr 12

Salinity, being a major environmental constraint, impedes plant growth and productivity worldwide. Menadione sodium bisulfite (MSB) was previously studied as activator of plant defense responses against pathogens. We further studied the potential of MSB in salt tolerance. MSB compound derived from vitamin K is soluble in water and possesses the potential to mediate plant defense responses to abiotic stress such as salinity. In the present experiment, foliar application of MSB (0, 50, 100, 150 and 200 µM) markedly mitigated salinity (100 mM) effects on two okra cultivars (Shabnam-786 and Arka Anamika). Salinity stress significantly decreased growth, chlorophyll and K⁺ content, but increased the tissue contents of Na⁺ and Ca²⁺ as well as the cellular levels of hydrogen peroxide (H₂O₂) and malondialdehyde (MDA). Plants with MSB treatment manifested minimal oxidative injury in the form of lower H₂O₂ and MDA accumulation. This decrease was ascribed to MSB-mediated improvement in the accumulation of antioxidant compounds (anthocyanins, ascorbate, flavonoids, and phenolics) alongside enhanced activities of catalase (CAT), peroxidase (POD), and superoxide dismutase (SOD). MSB-treated plants exhibited a maximal improvement in the accretion of total free amino acids and proline under salinity. Foliar spray of MSB at 50 µM effectively protected plants from salinity-induced oxidative damage and specific ion toxicity. Higher salinity tolerance in cv. Shabnam-786 was ascribed to better antioxidant system, lower oxidative damage, and minimal tissue Na⁺ contents compared with cv. Arka Anamika.

8

Effect of nitrogen on growth, extracellular polysaccharide and intracellular phycoerythrin production by the Porphyridium cruentum

68%

Iqbal M., Grey D., Stepan-Sarkissian G.

Acta Microbiologica Polonica

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1992

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tom 41

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nr 1-2

9

Effect of CaCl2 on growth performance, photosynthetic efficiency and nitrogen assimilation of Cichorium intybus L. grown under NaCl stress

68%

Arshi A., Abdin M. Z., Iqbal M.

Acta Physiologiae Plantarum

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2006

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tom 28

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nr 2

Pot culture experiments were conducted to assess the extent of growth, photosynthetic efficiency and nitrogen assimilation of chicory (Cichorium intybus L.) as affected by NaCl and CaCl₂ alone as well as in combination. Six treatments, i.e., 80 mM and 160 mM NaCl, 5 mM and 10 mM CaCl₂ and 80 mM + 10 mM and 160 mM + 10 mM of NaCl + CaCl₂ were given to the growing plants separately at three developmental stages, viz., the pre-flowering (30 DAS), flowering (120 DAS) and post-flowering (150 DAS) stages. Each NaCl treatment caused a significant reduction in total plant biomass, photosynthetic rate, stomatal conductance, total chlorophyll content, soluble protein content, NR activity and nitrogen content, although nitrate content increased. On the contrary CaCl₂ treatment gave a favorable effect, compared to the control. The effect of combined treatments was similar to that of NaCl but less in magnitude. Thus, the application of CaCl₂ may mitigate the adverse effect caused by NaCl.

10

Survey of residual pesticides in various fresh fruit crops: a case study

60%

Qamar A., Asi R., Iqbal M., Nazir A., Arif K.

Polish Journal of Environmental Studies

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2017

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tom 26

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nr 6

An in-vitro study was conducted to estimate the pesticidal residues in five types of fruits; melon, guava, orange, peach, and mango. Organochlorine, organophosphate, carbamates, and pyrethroids, along with other insecticidal residues, were detected. The collection of samples was carried out from farmland located in the indigenous soil of Faisalabad and Toba Tek Singh. The residual pesticides were extracted by single-phase extraction and then purified by the gel permeation chromatographic technique. The extracted residues were isolated and quantified by HPTLC method. The detected residues were in the range of 0.1-0.3 mg kg⁻¹. The study demonstrated a high risk of ongoing contamination posed by uncontrolled applications of pesticides, which are needed to be overcome on the lines of sustainable management measures.

11

Ambient air quality evaluation: a comparative study in China and Pakistan

60%

Niaz Y., Zhou J., Iqbal M., Nasir A., Dong B.

Polish Journal of Environmental Studies

|

2015

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tom 24

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nr 4

Vehicle and industrial emissions are responsible for a considerable share of urban air pollution concentrations. We conducted a comparative study in Dalian, China and Faisalabad, Pakistan to reevaluate NO₂, SO₂, and CO concentrations. Our study was conducted over the course of one year at different stations in both cities, and measured values were compared with ambient air quality standards such as NEQS-Pakistan, NAAQSUSEPA, CNAAQS-China, and global standard WHO. The NO₂ concentrations in Faisalabad varied from 185- 262 μg/m³ , whereas it was in the range of 44-133 μg/m³ in Dalian. The SO₂ concentration was found in the range of 66-190 μg/m³ and 56-128 μg/m³ , while CO varied from 5.4-22.3 mg/m³ and 0.3-2.8 mg/m³ , respectively, in Faisalabad and Dalian. The annual average NO₂, SO₂, and CO concentrations were below the permissible limits in Dalian; however, the measured values were considerably higher in Faisalabad. Our results are the first to compare air quality of two countries at different stations and highlight the possibility of reducing air pollution by comparing conditions.

12

Enhancement in growth and yield of mushroom using magnetic field treatment

60%

Jamil Y., Zia ul Haq, Iqbal M., Perveen T., Amin N.

International Agrophysics

|

2012

|

tom 26

|

nr 4

13

Heat shock increases oxidative stress to modulate growth and physico-chemical attributes in diverse maize cultivars

52%

Hussain I., Ashraf M. A., Rasheed R., Iqbal M., Ibrahim M., Ashraf S.

International Agrophysics

|

2016

|

tom 30

|

nr 4

The present investigation was conducted to appraise the physiochemical adjustments in contrasting maize cultivars, namely, PakAfgoi (tolerant) and EV-5098 (sensitive) subjected to heat shock. Seven-day-old seedlings were exposed to heat shock for different time intervals (1, 3, 6, 24, 48 and 72 h) and data for various physiochemical attributes determined to appraise time course changes in maize. After 72 h of heat shock, the plants were grown under normal conditions for 5 d and data for different growth attributes and photosynthetic pigments recorded. Exposure to heat shock reduced growth and photosynthetic pigments in maize cultivars. The plants exposed to heat shock for up to 3 h recovered growth and photosynthetic pigments when stress was relieved. A time course rise in the relative membrane permeability, hydrogen peroxide (H2O2) and malondialdehyde contents was recorded particularly in the EV-5098 indicating that heat shock-induced oxidative stress. Activities of different enzymatic antioxidants greatly altered due to heat shock. For instance, an increase in superoxide dismutase activity was recorded in both maize cultivars. The activity of ascorbate peroxidase was greater in Pak-Afgoi. However, the peroxidase and catalase activities were higher in plants of EV-5098. Heat shock caused a significant rise in the proline and decline in the total free amino acids. Overall, the performance of Pak-Afgoi was better in terms of having lesser oxidative damage and greater cellular levels of proline. The results suggested that oxidative stress indicators (relative membrane permeability, H2O2 and malondialdehyde) and proline can be used as markers for heat shock tolerant plants.

14

Variations in the physicochemical profilevof Khushab coal under various environmental conditions

52%

Amjed N., Bhatti I. A., Arif K., Iqbal M., Nazir A., Zahid M.

Polish Journal of Environmental Studies

|

2018

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tom 27

|

nr 3

This work illustrates the proximate analysis on three types of coal samples obtained from Khushab mines in Pakistan. Analysis of the coal matrix was carried out to determine volatile matter, ash contents, moisture, fixed carbon contents, calorific values, and sulfur contents as per standards of American Society for Testing and Materials (ASTM). The results of proximate analysis show 30.46% fixed carbon content, 28.08% ash content, 6.96% total moisture content, and 34.5% volatile matter within sample A, whereas 40.56% volatile matter, 8.03% moisture content, 8.32% ash and 30.46% fixed carbon content was found in sample B. Sample C contained 15.44% volatile matter, 9.16% moisture content, 40.64% ash content, and 37.5% fixed carbon content, respectively. Sample B has higher calorific value and sulphur contents in comparison to A and C. These coal samples are of good quality from an industrial prospective, but they need to be desulphurized prior to industrial use for the sake of the environment.

15

Role of graph theory to facilitate landscape connectivity: subdivision of a Harary Graph

52%

Arif K., Afzal Z., Nadeem M., Ahmad B., Mahmood A., Iqbal M., Nazir A.

Polish Journal of Environmental Studies

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2018

|

tom 27

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nr 3

This work focuses on mapping landscape connectivity by making use of a subdivision of a Harary graph through super edge antimagic total labeling. This study employs a Harary graph by inserting h vertices in each edge, where h = 2n, n ≥ 1 using the super (a, 2) edge antimagic total labeling and labeling the vertices and edges by taking the difference of arithmetic progression as 2 i.e. d = 2. We divided this paper into two parts. In first part, when the order of the subdivided harary graphs p varies then the distance t will remain the same, while in the other part, when the order p varies then distance t will also vary.

16

Hard water and dyeing properties: effect of pre- and post-mordanting on dyeing using eucalyptus globulus and curcuma longa extracts

52%

Mahmood S., Ali S., Qamar M. A., Ashraf M. R., Atif M., Iqbal M., Hussain T.

Polish Journal of Environmental Studies

|

2017

|

tom 26

|

nr 2

A laboratory-scale study was performed for fostering an eco-friendly approach by substituting synthetic colorant with natural plant extracts as dye source in the presence of hard water (prepared from NaHCO₃, MgSO₄, CaSO₄, and KCl). The dyeing behavior of cotton fabric was analyzed using extract from Eucalyptus globulus and Curcuma longa. Alum and ferrous sulphate were used as mordanting agents to mitigate the hard water effect on dyeing properties. The color strength and fastness properties of dyed cotton were studied. The hard water badly affected the color properties of fabric dyed with natural dyes. Mordant lessened the adverse effects of hard water, but not satisfactorily. The sequestering agent proved to be significant in mitigating the negative effect of hard water on fabric dyeing. Moreover, water hardness also adversely affected the extraction of natural dyes from Eucalyptus globulus and Curcuma longa; however, dye exhaustion was improved by mordant and the sequestering agent. Results revealed that the negative impact of hard water on dyeing properties can be mitigated using a sequestering agent.

17

Enhancement in germination, seedling growth and yield of radish (Raphanus sativus) using seed Pre-Sowing magnetic field treatment

52%

Haq Z., Jamil Y., Irum S., Randhawa M. A., Iqbal M., Amin N.

Polish Journal of Environmental Studies

|

2012

|

tom 21

|

nr 2

Radish seeds (Raphanus sativus, Mino variety) were exposed to full-wave rectified sinusoidal magnetic fields (MF) of strengths 40 mT, 80 mT, and 110 mT for 2.5, 5, and 10 min each, and its effects have been investigated on germination, seedling growth, and yield. Seeds were sown following the MF treatment according to the protocol of the International Seed Testing Association (ISTA) under controlled laboratory and field conditions. The MF treatment of seeds marginally reduced the days taken for germination while significantly (P<0.05) increasing seedling growth and yield. Plant height, root length, root mass, root girth, and yield increased up to 118.64%, 119.5%, 76.43%, 61.74%, and 76.41%, respectively, versus control. The results have shown that the environmentally friendly MF seed treatment could be used practically to enhance the germination and yield of radish crop.

18

Optimization of pre-sowing magnetic field doses through RSM in pea

52%

Iqbal M., Ahmad I., Hussain S. M., Khera R. A., Bokhari T. H., Shehzad M. A.

International Agrophysics

|

2013

|

tom 27

|

nr 3

Seed pre-sowing magnetic field treatment was reported to induce biochemical and physiological changes. In the present study, response surface methodology was used for deduction of optimal magnetic field doses. Improved growth and yield responses in the pea cultivar were achieved using a rotatable central composite design and multivariate data analysis. The growth parameters such as root and shoot fresh masses and lengths as well as yield were enhanced at a certain magnetic field level. The chlorophyll contents were also enhanced significantly vs. the control. The low magnetic field strength for longer duration of exposure/ high strength for shorter exposure were found to be optimal points for maximum responses in root fresh mass, chlorophyll ‘a’ contents, and green pod yield/plant, respectively and a similar trend was observed for other measured parameters. The results indicate that the magnetic field pre-sowing seed treatment can be used practically to enhance the growth and yield in pea cultivar and response surface methodology was found an efficient experimental tool for optimization of the treatment level to obtain maximum response of interest.

19

Novel approach for investigation of antibiotic residue in broilers grown under different agro-ecological conditions

44%

Nazir A., Raza A., Akbar A., Ahmad A., Aziz A., Iqbal M., Arooj T., Ehtisham-ul-Haque S.

Polish Journal of Environmental Studies

|

2020

|

tom 29

|

nr 6

20

Cytotoxicity and antimicrobial activity of pivalic and benzoic acid complexed Cu and Mn complexes

44%

Ali B., Tahir S., Akhtar M. N., Yameen M., Ashraf R., Hussain T., Ghaffar A., Abbas M., Bokhari T. H., Iqbal M.

Polish Journal of Environmental Studies

|

2017

|

tom 26

|

nr 6

The complexes of Cu and Mn metals with carboxylates (pivalic acid and benzoic acid) and imidazole were prepared and characterized. The synthesized complexes were screened for antimicrobial activity and cytotoxicity. The FTIR technique was used for characterization. The antibacterial assay revealed that the ligand and complexes are active against Escherichia coli, Staphylococcus aureus and Pasteurella multocida bacterial strains. The haemolytic assay revealed that [Cu(imi)(N₃)] and [MnIII(piv)(imi)(N₃)] were nontoxic, whereas [Cu(piv)(imi)] and [MnIII(Benz)(imi)(OCH₃)] showed moderate toxicity, and [Mn(Him)(N₃)₂] was highly toxic against human red blood cells (RBCs). Results revealed that Cu and Mn complexes with carboxylates (pivalic acid and benzoic acid) have antimicrobial activities. However, haemlytic assay revealed that the metal complex cytotoxicity was variable and biological activity evaluatuion of newly synthesized metals complexes is suggested for safe applications.

Ograniczanie wyników

Plant growth and yield as affected by environmental factors

Alleviation of salinity-induced perturbations in ionic and hormonal concentrations in spring wheat through seed preconditioning in synthetic auxins

Strategies toward optimization of cultural conditions of Porphyridium cruentum for higher polysaccharide production

Phytochemical analysis, antioxidant and anticancer activity of Aerva javanica growing in district Karak, Khyber Pakhtunkhwa Pakistan

Effect of presowing magnetic treatment on properties of pea

Antioxidant response of Cassia angustifolia Vahl. to oxidative stress caused by Mancozeb, a pyrethroid fungicide

Exogenous menadione sodium bisulfite mitigates specific ion toxicity and oxidative damage in salinity-stressed okra (Abelmoschus esculentus Moench)

Effect of nitrogen on growth, extracellular polysaccharide and intracellular phycoerythrin production by the Porphyridium cruentum

Effect of CaCl2 on growth performance, photosynthetic efficiency and nitrogen assimilation of Cichorium intybus L. grown under NaCl stress

Survey of residual pesticides in various fresh fruit crops: a case study

Ambient air quality evaluation: a comparative study in China and Pakistan

Enhancement in growth and yield of mushroom using magnetic field treatment

Heat shock increases oxidative stress to modulate growth and physico-chemical attributes in diverse maize cultivars

Variations in the physicochemical profilevof Khushab coal under various environmental conditions

Role of graph theory to facilitate landscape connectivity: subdivision of a Harary Graph

Hard water and dyeing properties: effect of pre- and post-mordanting on dyeing using eucalyptus globulus and curcuma longa extracts

Enhancement in germination, seedling growth and yield of radish (Raphanus sativus) using seed Pre-Sowing magnetic field treatment

Optimization of pre-sowing magnetic field doses through RSM in pea

Novel approach for investigation of antibiotic residue in broilers grown under different agro-ecological conditions

Cytotoxicity and antimicrobial activity of pivalic and benzoic acid complexed Cu and Mn complexes