OALib Journal期刊

ISSN: 2333-9721




2018 ( 3 )

2017 ( 87 )

2016 ( 112 )

2015 ( 242 )


匹配条件: “Choudhary Muhammad Ayyub” ,找到相关结果约7239条。
Response of Morphological and Chemical Attributes of Perennial Verbena against Drought Stress  [PDF]
Muhammad Ahsan Khatana, Muhammad Muzammil Jahangir, Choudhary Muhammad Ayyub, Rashad Waseem Khan Qadri, Muhammad Azam, Khurram Ziaf, Muhammad Awais Ghani, Waseem Iqbal
Open Access Library Journal (OALib Journal) , 2018, DOI: 10.4236/oalib.1104387
Drought stress is one of the foremost abiotic stresses which causes damage to verbena plant production by affecting its growth and development. There is less information available regarding utilization of perennial verbena under drought conditions. To check the ability of perennial verbena plant under water deficit conditions a pot research trial was planned. Perennial verbena’s seeds were sown in plastic trays and applied water daily. When seedlings attained two to three leaves stage then transplanted them into pots and exposed to different intervals of drought. Five drought intervals were applied such as after one day (T0), 4 days (T1), 6 days (T2), 8 days (T3) and 10 days (T4) irrigation intervals. Pots were arranged by adopting completely randomized design with four replications. Many morphological i.e. plant height (cm), root length (cm), number of leaves and flowers/plant, fresh weight of shoot and root (g), dry weight of shoot and root (g) and chemical attributes i.e. chlorophyll “a”, “b” and total contents of chlorophyll were examined during this study. The findings exhibited that perennial verbena plant performed best under control conditions while when we increased drought interval gradually from 4 days’ interval till 10 days’ interval it affected all growth and chemical attributes badly and caused severe damage at 10 days’ interval.
Study of Efficacy of Various Split Applications of Inorganic Nitrogen on Potato Crop  [PDF]
Choudhary Muhammad Ayyub, Shoaib Ur Reman, Rashad Waseem Khan Qadri, Muhammad Azam, Kareem Yar Abbasi, Zia Ullah Khan, Muhammad Rashid Shaheen, Muhammad Ali, Mujahid Hussain Leghari, Tehmina Asghar
Open Access Library Journal (OALib Journal) , 2018, DOI: 10.4236/oalib.1104386
Series of experiments have been conducted to find the optimized dose and efficacy of nitrogen to fulfill the requirements of plant at each level by making split doses. Being most important macro nutrient, afield trial was conducted to study the effect of without applying nitrogen (control) single nitrogen (N) application at planting time on yield and nitrogen uptake of potato in comparison to various split applications. Data were collected about plants vegetative growth, total yield and qualitative factors (TSS, nitrogen, phosphorus, potassium and protein percentage in tuber). Experimental design used was Randomized Complete Block Design (RCBD) having seven treatments with three replications. Data were analyzed by using standard statistical techniques. Overall, qualitative characters of tubers and yield enhanced with split nitrogen application as compared to all nitrogen applied once at planting time whereas, there was no significant difference between tuber nitrogen, potassium, phosphorus and protein contents.
Characterization of Water Melon (Citrullus lanatus) Genotypes under High Salinity Regime  [PDF]
Mujahid Ali, C. M. Ayyub, Muhammad Rashid Shaheen, Rashad Waseem Khan Qadri, Imran Khan, Muhammad Azam, Naheed Akhtar
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.619317
Abstract: For horticultural crops and especially for vegetables, salinity is dilemma. It is the most limiting factor for plant growth and development by producing reactive oxygen species and ultimately oxidative stress. In the present study, the screening of watermelon (Citrullus lanatus Thanb. Mavs.) Cultivars was observed for salt tolerance. Four salinity levels (1.5, 3, 4.5, and 6 dS·m-1 NaCl) and six cultivars (Crimson, Charleston Gray, Anarkali, Chairman, Sugar Baby and Champion) tested for screening. It was observed that all morphological attributes and ionic contents were severely affected. But it was revealed by statistical analysis that Charleston Gray was affected least while Champion was most salt sensitive cultivar due to oxidative stress and ionic toxicity. It is concluded that different genotypes under consideration vary in their ability to tolerate salt stress.
Enhancing the Salt Tolerance Potential of Watermelon (Citrullus lanatus) by Exogenous Application of Salicylic Acid  [PDF]
C. M. Ayyub, Mujahid Ali, Muhammad Rashid Shaheen, Rashad Waseem Khan Qadri, Imran Khan, M. Muzammil Jahangir, Karim Yar Abbasi, Shagufta Kamal, Muhammad Zain
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.619318
Abstract: Salicylic acid (SA) is a vital plant growth regulator providing promising role in plant development and adopts defense mechanism to abiotic stresses. Salinity is the most limiting abiotic factor for plant development and growth changes in watermelon by producing reactive oxygen species and ultimately oxidative stress. The present study was aimed to investigate the mechanism involved in salt stress alleviation in watermelon (Citrullus lanatus Thanb. Mavs.) through the foliar application of salicylic acid. Watermelon cv. Charleston Gray was grown under moderate saline regime of 3 ds·m-1 NaCl and sprayed with salicylic acid with four level (0.5, 1.0, 2.5 and 5.0 mmol/L) compared along with control. SA @ 5.0 mmol/L was found to be very effective in mitigation of salt stress. SA was found to be very effective in alleviation of salinity stress by produced antioxidants and acted as osmo-regulator.
Impact of foliar application of seaweed extract on growth, yield and quality of potato (Solanum tuberosum L.)
Muhammad Wasim Haider, Chaudhary Muhammad Ayyub, Muhammad Aslam Pervez, Habat Ullah Asad, Abdul Manan, Syed Ali Raza and Irfan Ashraf
Soil & Environment , 2012,
Abstract: A field trial was carried out in 2010 to investigate the effect of foliar application of seaweed extract “Primo” as an organic biostimulant on potato cv. ‘Sante’. Foliar application of seaweed extract was carried out at different growth stages of the crop (i.e. 30 days; 45 days; 60 days; 30 and 45 days; 30 and 60 days; 45 and 60 days; 30, 45 and 60 days after sowing). Control plants were sprayed with water without seaweed extract. A significant improvement in growth, yield and tuber quality of potato was observed where treatment was applied. The highest tuber yield was recorded with applications of seaweed extract at 30 + 60 days interval after planting. The treatment also improved nitrogen, total soluble solids and protein contents of the potato tubers. The results of the study concluded a positive response of potato plant growth and yield to the foliar application of seaweed extract.
Salt stress effects on some morphological and physiological characteristics of okra (Abelmoschus esculentus L.)
Muhammad Adnan Shahid*, Muhammad Aslam Pervez, Rashid Mukhtar Balal, Rashid Ahmad, Chaudhary Muhammad Ayyub, Tahira Abbas and Naheed Akhtar
Soil & Environment , 2011,
Abstract: Salinity is worldwide problem that limits the growth and productivity of all vegetations and it is going toincreasing day by day. The objective of the investigation was to study the response of okra (Abelmoschus esculentusL.) in terms of morphological and physiological characteristics under salt stress conditions. Okra seeds of cultivarChinese Red were grown in plastic pots having fine sand as growth medium. After 30 days of germination, theplants were subjected to salt stress under control, 25, 50, and 75 mM NaCl. Increasing salinity caused a decrease ofgermination percentage, shoot and root length, plant height, pod weight, pod length, photosynthesis rate, andstomatal conductance. The Na+ and Cl- accumulation were correlated with a decline in concentration of K+ inleaves and roots. Under salinity, a high concentrations of Na+ and Cl- were noted in both leave and roots portions.
Effect of Various Chemicals on Vase Life and Quality of Cut Tuberose Flowers
Allah Bakhsh,Muhammad Arif Khan,C.M. Ayyub,Mubarak Ali Shah
Pakistan Journal of Biological Sciences , 1999,
Abstract: These studies were conducted at Floriculture and Landscaping Research Sub-station Multan, during 1996. Cut tuberose were treated with solutions containing various chemicals to test their effects on vase life and quality. Vase life was increased three times by a solution containing 200 ppm silver nitrate (AgNO3) and 4m M silver thiosulfate (STS). Pulsing cut tuberose stems in a solution containing glucose and sucrose prolonged vase life and improved quality. Flower harvested at tight bud stage had significantly longer vase life compared to flowers cut at half opened bud stage. The quality of flowers was also improved greatly by pulsing flowers in silver nitrate (AgNO3) and silver thiosulfate (STS) chemicals.
Evaluation of Different Radish (Raphanus sativus) Genotypes under Different Saline Regimes  [PDF]
C. M. Ayyub, Muhammad Rashid Shaheen, Samad Raza, Muhammad Sarwar Yaqoob, Rashad Waseem Khan Qadri, Muhammad Azam, M. Awais Ghani, Imran Khan, Naheed Akhtar
American Journal of Plant Sciences (AJPS) , 2016, DOI: 10.4236/ajps.2016.76084
Abstract: An effective and simple screening technique for identification of salt tolerant and salt sensitive radish genotypes was observed. Sand is used as potting media. Six genotypes of radish were used for screening against four salinity levels (0, 1, 3, 5 and 7 dS/m-1). Twenty days old seedlings of radish were salinized with salt solution (NaCl). Morphological, physiological and ionic parameters were studied. Radish genotypes Laal-Pari and 40 Days executed the best performance in all the measured attributes and categorized as salt tolerant genotype while Green Neck was the poorest in retaining normal functioning at higher salinity levels thus grouped under salt sensitive cultivar.
Phytochemical Evaluation of Chenopodium murale Linn.
Bashir Ahmad,Qasim Jan,Shumaila Bashir,Muhammad Iqbal Choudhary
Asian Journal of Plant Sciences , 2003,
Abstract: Phytochemical evaluation of Chenopodium murale Linn. whole plant,revealed the presence of two flavonoids along with two steroidal glycosides, which were identified as 3,7-Dihydroxy-3`-(4-hydroxy-3-methylbutyl)-5,6,4`-trimethoxyflavone (1), 5,7-Dihydroxy-3`-(2-hydroxy-3-methyl-3-butenyl)-3,6,4`-trimethoxyflavone (2), βSitosterol 3-O-βD-glucoside (3),Stigmasterol 3-O-βD-glucoside (4). Although these were known compounds, but isolated for the first time from this plant specie. The characterization of all these compounds was achieved by various spectroscopic methods and the results were compared with the literature.
A Study of Online English Language Teacher Education Programmes in Distance Education Context in Pakistan
Muhammad U. Farooq,AbdulRahman Al Asmari,Choudhary Z. Javid
English Language Teaching , 2012, DOI: 10.5539/elt.v5n11p91
Abstract: Technology-based initiatives have transformed the process of teaching and learning activities at formal institutions generally and distance education institutions particularly. Distance education is at the heart of the digital age making maximum use of the emerging technologies. Researchers have favoured computer mediated communications (CMC) for improving the quality of teacher education in developing countries by providing access to more and better educational resources. The researchers designed a CMC-ELT blended model and offered online English language teacher education courses at post-graduate level. A group of students enrolled in MA TEFL programme of Allama Iqbal Open University (AIOU) Islamabad Pakistan, was selected randomly and was guided through CMC-ELT blended model. The results of the study showed that the online support in distance education enhanced students’ performance in terms of access, interaction and cost. The effective use of online support in distance education can improve the quality of English language teaching programmes in Pakistan.

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