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Home > Influence of Exogenous Application of Proline on Some Physio-Biochemical Parametersof Maize Zea Mays L. under Drought Stress

Influence of Exogenous Application of Proline on Some Physio-Biochemical Parametersof Maize Zea Mays L. under Drought Stress

Thesis Info

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Author

Rukhsana Qamar

Institute

Virtual University of Pakistan

Institute Type

Public

City

Lahore

Province

Punjab

Country

Pakistan

Thesis Completing Year

2019

Thesis Completion Status

Completed

Subject

Software Engineering

Language

English

Link

http://vspace.vu.edu.pk/detail.aspx?id=383

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676721039210

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In natural the plant is exposed to different environmental constrains. The abiotic factors are caused by salinity, drought, extreme temperature and heavy metals. In these stresses, the deficiency is main abiotic pressure that reduced the escalation of plant, development& yield. In reply to deficiency of pressure, plant produces different types of antioxidants and osmolytes. In these osmolytesproline and glycinebetaine are most popular. The exogenous application of proline is most important against stress. Maize is an important plant which belongs to family Poaceae. That could be cooked in terms of food, feed & forage crop. This study was designed to examine the biochemical & proteomic profile under drought and pre-Soakedproline concentration. The test was conduct in randomized set of block through three replicates. The two varieties of maize were grown in normal condition with and without pre-Soakedproline. The plant after germination of three weeks was subjected to drought stress by withdrawing normal irrigation. After one week of stress, the plant was harvested. The shoot size was minimized below deficiency of stress in 0ppm increased in 200ppm in drought stress. While the root length was minimized below lack stress and lesser reduction occurs in 400ppm concentration of proline. The dry & fresh weight of shoot & root became reduced in drought while less reduction in 200ppm pre-Soakedproline. The total soluble proteins and free amino acids was reduced under drought stress while lesser reduction occurs in 400ppm pre-Soakedproline. The chlorophyll contents was decreased in both varieties. The pre-Soaked 400ppm proline in control and drought showed better chlorophyll contents. The different expression was shown in reducing condition. The 200ppm of proline is most effective in both varieties. The varieties Hay corn is most tolerant toward the drought stress.
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Fingerprint Distortion Removal and Enhancement by Effective Use of Contextual Filtering

Automated personal authentication has become increasingly important in our information driven society and in this regard fingerprint based personal identification is considered to be the most effective tool. In order to ensure reliable fingerprint identification and improve fingerprint ridge structure, novel fingerprint enhancement approaches are proposed based on local adaptive contextual filtering. This dissertation presents the aims and objectives of the research along with the motivation and proposed research approaches for fingerprint enhancement mentioned below. In the first part of this research, a twofold enhancement technique is proposed that involves processing both in frequency and spatial domain. The fingerprint image is first filtered in frequency domain and then local directional filtering in spatial domain is applied to obtain enhanced fingerprint. Two major advantages of the proposed enhancement technique are; avoiding the hazards of frequency estimation errors and making spatial domain filtering quite simple by using a global 1D Gaussian smoothing filter. In order to determine the performance evaluation of the proposed enhancement, extensive evaluation of the proposed method against well-known enhancement approaches has been carried out on publicly available standard databases. Experimental results demonstrate that proposed enhancement performs better as compared to other well-known enhancement techniques. In the second part of this work, a fingerprint image with non-uniform ridge frequencies is considered as a 2-D dynamic signal. A non-uniform stress on the sensor’s sensing area applied during fingerprint acquisition may result in a nonlinear distortion that disturbs the local frequency of ridges, adversely affecting the matching performance. This study presents a new approach based on short time Fourier transform (STFT) analysis and local adaptive contextual filtering for frequency distortion removal and enhancement. In the proposed approach, the whole image is divided into sub-images and local dominant frequency band and orientation are estimated. Gaussian Directional band pass filtering is then adaptively applied in frequency domain. These filtered sub-images are then combined using our proposed technique to obtain the enhanced fingerprint image of high ridge quality and uniform inter-ridge distance. Experimental results show efficacy of the proposed enhancement technique.