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Home > Histopathological Studies and Enhancement of Resistance Against Purple Blotch of Onion

Histopathological Studies and Enhancement of Resistance Against Purple Blotch of Onion

Thesis Info

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Author

Mansha, Muhammad Zeeshan

Program

PhD

Institute

University of Agriculture

City

Faisalabad

Province

Punjab

Country

Pakistan

Thesis Completing Year

2018

Thesis Completion Status

Completed

Subject

Plant Pathology

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/11218/1/Muhammad%20Zeeshan%20Mansha_Plant%20Pathology_UAF.docx

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676726372867

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Commercially, among the other cultivated vegetable crops, onion has paramount importance throughout the country. It is valued for its particular sharp taste and is a fundamental element for the cooking in numerous areas. A number of diseases attack onion crop but purple blotch is the most important one and cause huge losses. Genetic variability exists among onion genotypes to exploit resistance against purple blotch. Selection of onion genotypes with higher potential of resistance against purple blotch is considered a relatively better and natural way to combat against purple blotch. In 2014-15, studies on evaluating the resistant source against purple blotch of onion was conducted at the experimental research area of Department of Plant Pathology, University of Agriculture, Faisalabad. Twenty five onion genotypes were grown in randomized complete block design (RCBD) and evaluated against purple blotch on the basis of percent disease index (PDI) and disease rating scale. Experiment of resistance induction was conducted in glass house during 2015 and 2016. Selected genotype was treated with salicylic acid (2 mM) and Bion (125 ppm) by using foliar application and seedling root dipping methods to observed the severity of PB and biochemical attributes (PO, PPO, PAL, total Phenolics) following completely randomized design in factorial arrangement. Histopathological experiment was conducted during 2015-16 in which healthy and diseased onion tissues were compared with respect to time interval under microscope. Results showed that Phulkara, Sunset, Ceylon, TI-172 and XP-Red showed resistant response with rating 1. Five varieties (Desi Red, Early Red, Robina, Dark Red, Mirpurkhas) expressed moderately resistant response with rating 2. VRIO-6, VRIO-1, VRIO-4, Red Nasik and Desi Black express moderately susceptible response with rating 3. Five varieties viz. VRIO-9, Pak-10321, Fsd Red, Pusa Red and Red Imposta gave susceptible response with rating 4, while five varieties (VRIO-3, VRIO-5, VRIO-8, VRIO-7, VRIO-2) exhibited highly resistant response under rating 5 in both years. During 2015-16, severity of PB was reduced significantly with the application of resistance inducers. Foliar application significantly reduced the disease severity in both years as compared to seedling root dipping method. Maximum reduction in disease severity was observed in Bion (52.04%) while in salicylic acid (37.11%) reduction was assessed. Biochemical activity was maximum after ten days of treatment application. Foliar application of resistance inducers enhanced the biochemical activity as compared to seedling root dipping method. Remarkable increase in Total Phenolics (80.40%), Peroxidase activity (25.59%), Polyphenol Oxidase activity (47.29%), Phenylalanine ammonia lyase (88.53%) was assessed where BION + Alternaria porri was applied over control. Similar but increasing trend was observed during 2016.In histopathological experiment, Alternaria porri penetrated through epidermis and stomata in leaf tissue after three days of infection. Penetration of Alternaria porri accompanied with chemical degradation of surrounding host tissue. Host cell walls contained extracellular deposits that were prominent under microscope after six days of infection. Alternaria porri cause damage to host cell due to which cell collapse. Cytoplasm of cell disorganized due to excessive growth of hyphae and secondary metabolites. Whole process from penetration to cytoplasm degradation completed after nine days of infection. Similar results were observed in both years regarding histopathology. Resistance of onion genotype was enhanced in case of Bion against PB whereas foliar application of Bion (125 ppm) + Alternaria porri minimized purple blotch disease more efficiently.
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اداریہ

سیالکوٹ کی تہذیب قدامت کے لحاظ سے پانچ ہزار سال سے بھی پہلے کے آثار ظاہر کرتی ہے۔راجہ شل نے اس تہذیب کو پروان چڑھانے میں اہم کردار ادا کیا۔اس شہر کی تہذیبی روایات اور علمی آثار " مہابھارت" میں بدرجہ اُتم موجود ہیں۔سیالکوٹ کی مٹی بڑی زرخیز اور مردم خیز ہے۔سرزمین سیالکوٹ نے علم وادب وفنون لطیفہ کے میدانوں میں گراں قدر خدمات سرانجام دی ہیں۔سیالکوٹ کی علمی وادبی  اہمیت مسلمہ ہے۔ہر دور میں خواہ وہ ہندو راج ہو ، مغلیہ راج ہویا انگریز راج سیالکوٹ نے ہردور میں علمی وادبی مرکز کے حوالے سے اپنی شناخت قائم رکھی ہے۔یہاں سے بہت سی نامور روحانی اور علمی وادبی شخصیات نے جنم لیا ہےاور بعض نے یہاں کی روحانی اور علمی وادبی شخصیات سے فیض حاصل کیا ہے۔٧٠٠ قبل مسیح سے٦٠٠ قبل مسیح تک یہ اتنا عظیم تعلیمی مرکز تھا۔کہ بنارس کے شہزادے حصول علم کے لیے یہاں آتے تھے۔

اکیسویں صدی عیسویں میں بھی شہرِ اقبال اپنی تہذیبی و ادبی  روایات کی بازیافت کے لیے خاصا سرگرم عمل ہے۔ملا عبدالحکیم سیالکوٹی ،مولانا فیروزالدین،اقبال ،فیض ،مولانا ظفر علی خاں،  ہاشم شاہ،حضرت رائج سیالکوٹی، دلشاد ،منشی میراں بخش جلوہ،محمد الدین فوق ،اثر صہبائی ،سلیم واحد سلیم ،بدری ناتھ سدرشن،جوگندر پال ،غلام الثقلین نقوی ،رجندر سنگھ بیدی،عبدالحمید عرفانی،سرمد صہبائی،خالد نظیر صوفی، ڈاکٹر جاوید اقبال،ساغر جعفری،مولوی ابراہیم میر،آسی ضیائی رامپوری،طفیل ہوشیارپوری،اے ڈی اظہر،حفیظ صدیقی،صابر ظفر،اصغر سودائی اور جابر علی سید دنیائے شعروادب کے اہم ستارے ہیں۔جن کا تعلق سیالکوٹ کی دھرتی کے ساتھ تادمِ حیات رہا ۔موجودہ دور میں بھی خطہ سیالکوٹ علمی وادبی میدان میں مضافاتی دائرے سے نکل کر قومی وبین الاقوامی ادبی دھارےمیں شامل ہونے کے لیے پرتول رہا ہے۔پنجاب لٹریری فورم سیالکوٹ اسی سلسلے میں اہم کردار ادا کررہا ہے۔اس ادبی تحریک کا ثمر اس خطے کی ادبی سرگرمیوں کی نشاة ثانیہ کی...

موجودہ وبائی ماحول میں عسل کی طبی افادیت جدیدسائنس اور اسلامی تعلیمات کی روشنی میں

 Honey is an unparalleled treasure of medicinal properties. Honey has the ability to strengthen the human body's immune system. Therefore, the use of honey and other natural foods is extremely beneficial and effective in current epidemic environment. Honey is one of the most appreciated and valued natural blessing of Allah for human being. Medicinal importance of honey hase been described in Holy Quran. Holy prophet (SAW) has advised to use honey because honey provides body instant energy. There are several varieties of honey are found in different areas of the world. Honey has been taken for research because of its nutritional popularity and medicinal quality. Honey is high in important nutrients of benefits and uses. Honey contains carbohydrates, vitamins, minerals and a significant amount of fiber. Nutrients of honey can improve digestive system by preventing constipation. Immunity system can be improved by using honey in epidemic environment. Honey is a source of fructose, which does not harm patients of diabetes. The fructose makes a better substitute for sugar because of the fiber, nutrients and antioxidants. Honey is comprised of several minerals including phosphorus, iron, potassium, calcium and magnesium. Honey has very small amount of protein and fats. This research paper analyzes ingredients and minerals of honey in Islamic perspective. The research work highlights medical benefits of honey in the light of modern science and Islamic teachings in the current epidemic environment.

Development, Characterization and In-Vivo Evaluation of Pharmaceutical Cocrystals

Background: Oral drug delivery is a great challenge for poorly water soluble drugs. In the past various techniques have been adopted to improve the solubility of lipophilic drugs. Major problem associated with oral drug delivery system is poor bioavailability that is attributed to low solubility and permeability. A pharmaceutical cocrystal is one of the recent techniques for the modification of various pharmaceutical parameters of drugs such as solubility, stability, dissolution and bioavailability. Various cocrystal formers i.e., citric acid, benzoic acid, glutaric acid, glycolic acid, tartaric acid and nicotinamide etc. have been utilized for this purpose. Glipizide belongs to second generation sulphonylureas have low solubility and high permeability. Efforts have been made for solubility enhancement of glipizide through various techniques. However, cocrystalization is another emerging technique for solubility enhancement of BCS-II class drug glipizide. Objective of study: The aim of present work was to develop pharmaceutical cocrystals for solubility enhancement of glipizide using citric acid, nicotinamide, glutaric acid and glycolic acid as a coformer. Statement of novelty: Pharmaceutical cocrystalization technique has adopted in this work for solubility enhancement of poorly water soluble drug, glipizide. So, novelty lies in the synthesis of glipizide cocrystals using different coformers and techniques for improvement of solubility, dissolution as well as in-vivo performance of drug. Methodology: Cocrystals were prepared by four reported methods i.e., solid state grinding, liquid assisted grinding, slurry and solvent evaporation. The effect of formulation parameters such as coformer type, ratio of coformer used as well as type of method employed was studied on solubility and drug release. On the basis of invitro drug release and solubility studies, optimum formulations were selected for further characterization. Micromeritic studies were performed to determine the flow properties of synthesized cocrystals. Particle size was confirmed by optical microscopy and zeta sizer analysis. Fourier Transform Infrared Spectroscopy (FTIR), Powder X-ray Diffraction (PXRD), Differential Scanning Calorimetry (DSC), Thermo-gravimetric analysis (TGA) and Scanning Electron Microscopy (SEM) were performed for structural analysis, crystallinity, thermal stability and surface Page XXII morphology determination, respectively. In-vivo studies of optimum formulations i.e., glipizide-citric acid (GPZ-CA) and glipizide-nicotinamide (GPZ-NICO) cocrystals were conducted to determine the pharmacokinetic profile of glipizide. Statistical analysis was also performed through univariate analysis of variance (UANOVA) at 5% level of significance (p-value) to determine the significance of results. Results: GPZ-CA, GPZ-NICO, GPZ-GLU and GPZ-GLY cocrystals were synthesized successfully. Solubility of glipizide was significantly enhanced by cocrystals in water as well as in buffers of pH 1.2 and pH 6.8. Solubility of GPZ-CA cocrystals in distilled water was found 54.75 folds and 55.75 folds from F1 and F8 formulations, respectively. Optimum formulations of GPZ-NICO cocrystals showed 69.5 folds (F2) and 73 folds (F6) increase in water solubility. GPZ-GLU cocrystals showed 53 folds and 54.27 folds improved solubility in distilled water from optimum formulations F3 and F7, respectively. However, solubility enhancement in case of GPZ-GLY cocrystals was found as 52 folds (F4) and 53 folds (F8) from optimum formulations as compared to pure drug. All formulated cocrystals were having good flow properties as confirmed by micromeritic analysis. Optical microscopy and zeta sizer confirmed the particle size of cocrystals in micrometric to nanometric range. SEM revealed variable surface morphology of cocrystals. Presence of glipizide in the form of white steaks on cocrytals was confirmed by SEM. FTIR analysis confirmed the formation of cocrystals. Thermal stability was confirmed by thermal analysis of formulations. Crystalline nature of formulated cocrystals was confirmed by PXRD. Release of glipizide from prepared cocrystals was found to be higher when compared to conventional glipizide. However, maximum drug release was observed at pH 6.8 than pH 1.2 from all formulations. In-vivo studies presented higherCmax and improved pharmacokinetic parameters i.e., AUC(0-24), AUMC(0-24) and shortened Tmax as compared to glipizide in the form of powder. Conclusion: Hence, it was concluded that cocrystals could pave the way for development of an improved design strategy to overcome the solubility and dissolution problems associated with BCS-II class drugs.