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Home > Response of Maize Zea Mays to Auxin Producing Plant Growth Promoting Rhizobacteria under Saline Conditions

Response of Maize Zea Mays to Auxin Producing Plant Growth Promoting Rhizobacteria under Saline Conditions

Thesis Info

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Author

Iqbal, Muhammad Asif

Program

PhD

Institute

University of Agriculture

City

Faisalabad

Province

Punjab

Country

Pakistan

Thesis Completing Year

2014

Thesis Completion Status

Completed

Subject

Commerce

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/2076/1/2357S.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676724985122

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Soil salinity is one of the most widespread agricultural problems which reduce the field and crop productivity. Salinity disturbs the hormonal balance in plants which results in poor growth. Use of plant growth promoting rhizobacteria (PGPR) is considered an economical and environment-friendly approach to combat salinity stress. This study was carried out to investigate the effect of PGPR on the growth, antioxidant status, physiological parameters and mineral content of maize (Zea mays) in salt affected soils. Bacterial strains were isolated from the rhizosphere of maize growing under salt affected soil conditions. These strains were screened on the basis of auxin production and their ability to withstand salinity stress. Nineteen rhizobacterial strains producing auxin were further screened for their growth promoting activity under axenic conditions at 0, 4, 8, 12 and 15 dS m-1 salinity levels. Two strains were selected after this study and their ability of growth promotion in the presence and absence of L-TRP was tested alone and in combination under salt affected pot and field conditions. Results showed that soil salinity reduced the plant growth, physiological parameters, mineral nutrient uptake and yield of maize while antioxidant activity and proline concentration was increased. Inoculation with PGPR strains under saline soils alleviated the salinity effects on the antioxidant enzymes (APX and SOD), along with those on photosynthesis, mineral content and growth in the absence and presence of L-TRP application. Dual inoculation showed better results than sole inoculation. The results of the present study highlight the significance of PGPR strains to alleviate the adverse effects of salinity stress
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مولانا سید اخلاق حسین دہلوی

مولانا سید اخلاق حسین دہلوی
افسوس گزشتہ ماہ مولانا سید اخلاق حسین دہلوی کی رحلت سے علم و ادب اور دلی کی تہذیب و شرافت کا ایک روشن نقش بھی مٹ گیا۔
وہ ۱۹۰۶؁ء میں دہلی کے ایک معزز سادات عالیات کے خاندان میں پیدا ہوئے، ان کے پردادا سید علی بغدادی محمد شاہ کے زمانہ میں بغداد سے دہلی تشریف لائے، ان کے پوتے اور مرحوم کے والد ماجد محمد ابراہیم حسین کا شمار دلی کے نامور شرفاء میں ہوتا تھا، سید احمد دہلوی صاحب فرہنگ آصفیہ ان کے رشتہ کے چچا تھے اور مولانا دہلوی کے بھائی حکیم سید حسین دہلوی کے متعلق کہا جاتا ہے کہ دلی کی تہذیب و معاشرت کے شاید آخری کامل نمونہ تھے۔ ان کا انتقال کچھ عرصہ قبل ہوا۔ پہلے عرب سرائے، دلی کے شرفاء کی قابل احترام ہستی تھی، گردشِ روزگار سے جب یہ اپنے مکینوں سے خالی ہوئی تو اس کے آثار و باقیات کو سخت حالات کے باوجود ان دونوں بھائیوں نے قائم رکھنے کی سعی کی اور اس کے قبرستان و مساجد کی تولیت ان ہی کے ہاتھوں میں رہی۔
خاندان کے علمی ماحول کے اثر سے سولہ برس کی عمر ہی میں مولانا اخلاق دہلوی کے قلم سے ایک کتاب نکلی۔ کچھ عرصہ تک انہوں نے میرٹھ کے قصبہ بڑوت کے ایک کالج میں تدریسی فرائض بھی انجام دیے، اسی زمانے میں انھوں نے درسیات کا سلسلہ شروع کیا جیسے مضمون نگاری، میزان سخن، خلاصہ مصباح القوا عداد رشمیم بلاغت وغیرہ۔ اردو کالج دہلی کے طالب علموں کی سہولت کے لیے مولانا امام بخش صہبائی کی کتاب حدائق البلاغت کی تلخیص روح بلاغت کے نام سے کی، یہ سب کتابیں مقبول ہوئیں اور طلبہ کے علاوہ عام اردو خواں طبقہ کو بھی اس سے فائدہ پہنچا، مولانا کی علمی و تحقیقی کاوشوں کا موضوع...

EFFECTS OF MULLIGAN ROTATIONAL MOVEMENT VERSUS MEDIAL GAPPING TECHNIQUE ON PAIN, RANGE OF MOTION AND DISABILITY IN PATIENTS WITH KNEE OSTEOARTHRITIS

Background and Aim: To compare the effects of mulligan rotational movement and medial gapping technique on pain, range of motion and disability in knee osteoarthritis patients. Methodology: This study was a Randomized Clinical Trial. The data was collected using a convenience sampling technique. Data was collected from Jinnah Hospital Lahore, from 15th December – 30th June 2022.36 subjects (males and females) were recruited in two groups. The first group received Mobilization with movement along with a conservative treatment protocol. The second group received the Medial gapping technique along with conservative treatment protocol. Each group was treated for four weeks in which three sessions per week were given. Numeric pain rating scale and the disability index were used as outcome measures. Data was analyzed through statistical package for the social sciences (SPSS) version 25. Results: Within-group comparison by paired t-test showed the p-value was significant <.05, indicating that both treatment was effective in improving symptoms. Between groups, comparison by independent t-test showed that Mulligan Mobilization Technique is more effective than the medial gapping technique in improving pain disability and quality of life. Conclusion: The study concluded that Mulligan Mobilization Technique provides more clinical benefits regarding pain, disability and range of motion in osteoarthritis patients than Medial Gapping Technique.

Phosphate Solubilizing Bacteria: Their Isolation, Characterization and Impact on Plant Growth

Three phosphate solubilizing bacteria were isolated and identified by 16S rRNA sequencing as Pseudomonas putida, Pseudomonas sp and Pseudomonas fulva. The strains were subjected to plant biochemical testing and all the PGPR attributes were checked in the presence of pesticides (chlorpyrifos and pyriproxyfen). The phosphate solubilizing index of strain Ros2 was highest in NBRIP medium i.e 2.23 mm. All the strains showed acidic pH (ranges from 2.5-5) on both medium i.e PVK and NBRIP. Strain Ros2 was highly positive for ammonia production as well as siderophore production while strain Rad2 was positive for HCN production. The results obtained by the strains Rad1, Rad2 and Ros2 for auxin production were 33.1, 30.67 and 15.38 μg ml-1, respectively. Strain Rad1 showed 16% increase in percentage germination in comparison to control in the presence of pesticide stress. Most promising results for chlorophyll content estimation were obtained in the presence of carotenoids upto 6 mgg-1 without stress by both strains Rad1 and Rad2. Study suggests that especially strain Ros2 can enhance plant growth parameters in the pesticide stress.