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Chaudhary Charan Singh Haryana Agricultural University, Hisar

Chaudhary Charan Singh Haryana Agricultural University popularly known as HAU, is one of Asia's biggest agricultural universities, located at Hisar in the Indian state of Haryana. It is named after India's seventh Prime Minister, Chaudhary Charan Singh. It is a leader in agricultural research in India and contributed significantly to Green Revolution and White Revolution in India in the 1960s and 70s. It has a very large campus and has several research centres throughout the state. It won the Indian Council of Agricultural Research's Award for the Best Institute in 1997. HAU was initially a campus of Punjab Agricultural University, Ludhiana. After the formation of Haryana in 1966, it became an autonomous institution on February 2, 1970 through a Presidential Ordinance, later ratified as Haryana and Punjab Agricultural Universities Act, 1970, passed by the Lok Sabha on March 29, 1970. A. L. Fletcher, the first Vice-Chancellor of the university, was instrumental in its initial growth.

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Subject: Biochemistry × Author: Anju Rani × End date: 2022 × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    Biochemical and protein profiling in response to application of herbal nano-formulation(s) on shelf life of guava (Psidium guajava L.)
    (CCSHAU Hisar, 2022-09) Anju Rani; Tokas, Jayanti
    The guava (Psidium guajava L) is a resilient, easily adaptable and evergreen tree of the Myrtaceae family. Guavas are nutrient rich fruit having high content of vitamin A, vitamin C, antioxidants and minerals but the post-harvest losses stand at 20-40% of the produce. Herbal NFs were used to prevent post-harvest losses. Initially, different herbal extracts of giloy (leaves and stem) and ajwain seeds were prepared using different solvents and extraction procedure. Ajwain methanol (E2), ajwain methanol-acetone (7:3) (E3), giloy methanol (E16) and giloy acetone (E17) leaves extracts were selected for NFs synthesis. Three NFs viz. sodium alginate: CaCl2 (T1), sodium alginate: CaCl2: ajwain extract (T2), and sodium alginate: CaCl2: giloy extract (T3) were selected for further treatment. Physiological, quality, minerals, cell wall and ripening related parameters were analyzed every alternate day upto 10 DAT during storage at 25±2 °C and 32±2 °C. The results revealed that physiological loss in weight increased and fruit firmness decreased during storage. The quality parameters viz., total sugars, reducing sugars total soluble solids and ascorbate increased initially and then decreased at both the storage temperatures. The percent increase in total soluble sugars, reducing sugars and TSS on 10th day was maximum in control (34.8 and 36.6%; 70.7 and 76.3%; 31.8 and 34.8%) followed by T1 (29.3 and 30.0%; 64.6 and 66.2%; 15.7 and 25.1%), T3 (17.3 and 23.1%;42.5 and 49.4%; 5.1 and 9.5%), and T2 (14.9 and 20.7%; 36.4 and 44.6%; 3.7 and 8.9%) NFs at 25±2 °C and 32±2 °C. Whereas, Titratable acidity, crude proteins and antioxidant activity reduced during storage. Minerals content decreased during ripening in all the treatments and minimum decrease was recorded in T2 NFs treated fruits. Activity of cell wall degrading enzymes cellulase and polygalaturonase increased as the storage period increased whereas pectin methyl esterase activity increased initially and then decreased. The maximum percent increase of cellulase and PG was observed in control (272.6 and 365.3%; 285.3 and 325.3%) fruits followed by T1 (225.6 and 343.6%; 271.0 and 306.5%), T3 (211.2 and 318.7%; 224.1 and 272.2%) and T2 (201.3 and 292.9%; 215.2 and 266.5%) NFs treated fruits at 25±2 °C and 32±2 °C. Ethylene peak was observed on 4th and 6th day of treatment at 25±2 °C and 32±2 °C and similar trend was observed for ACC oxidase activity. The results revealed that Sodium alginate: CaCl2: Ajwain (T2) NF was most effective in controlling post-harvest losses and increased shelf life by upto 10-12 days. Lesser quality degradation took place at 25±2 °C as compared to 32±2 °C. The, control and T2 NF treated fruits were further analyzed for proteomics study using 2D-Electrophoresis and LC-MS/MS. Maximum proteins concentrated at higher pH and more in the range of 20-120 kD in 2D gel. Analysis of LC-MS/MS results using MASCOT software revealed more than 100 differentially expressed proteins (DEPs), out of which 35 proteins were up-regulated and 20 proteins were down-regulated having fold change ≥1.5 and ≤0.12, respectively, which were further analysis using GO software. Proteins were classified on the basis of molecular, biological and cellular functions. Protein profiling elucidated the expression of some novel proteins which might play a role in delayed ripening.