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Dr. Y. S. Parmar University of Horticulture & Forestry, Solan

Dr. Yashwant Singh Parmar University of Horticulture and Forestry, Solan, was established on 1st December, 1985 with the objective to promote education, research and extension education in the fields of Horticulture, Forestry and allied disciplines. Late Dr. Yashwant Singh Parmar, the first Chief Minister and the architect of Himachal Pradesh perceived the importance of Horticulture and Forestry to develop and improve the State economy which led to the establishment of this University. Its history lies in erstwhile Himachal Agricultural College, Solan, established in 1962 and affiliated to the Panjab University. It became one of the campuses of Agriculture Complex of Himachal Pradesh University on its formation in 1970. Consequent upon the establishment of Himachal Pradesh Krishi Vishvavidyalaya in 1978, this campus became its Horticulture Complex and finally in 1985, assumed the status of a State University, being the only University in the country engaged exclusively in teaching, research and extension in Horticulture and Forestry. The University is located at Nauni in Solan District of Himachal Pradesh, 13 km from Solan on Solan-Rajgarh Road, at an elevation of 1300 metres above mean sea level. Solan town is situated on national highway (NH-22) and is well connected by train and bus services. The University has four constituent colleges, out of which, two are located at the main campus Nauni, one for horticulture and the other for forestry, having 9 and 7 departments, respectively. The third College i.e., College of Horticulture & Forestry is located at Neri in Hamirpur District on Nadaun-Hamirpur state highway, about 6 Km from Hamirpur town and is well connected with bus service. The college offers three Undergraduate Degree Programmes i.e. BSc (Hons.) Horticulture, BSc (Hons.) Forestry and B. Tech. Biotechnology and MSc degree programme in a few subjects. The fourth college i.e. College of Horticulture and Forestry, Thunag (Mandi) is located at Thunag District Mandi. This college offer BSc (Hons.) Horticulture and BSc (Hons.) Forestry degree programme. In addition, there are five Regional Research Stations, 12 Satellite Stations and five Krishi Vigyan Kendras (KVKs) situated in different zones of the State.

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20221
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Subject: Basic Sciences × Author: DHIMAN, VINAY KUMAR × Type: Thesis × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    CHARACTERIZATION OF DROUGHT TOLERANT PLANT GROWTH PROMOTING RHIZOBACTERIA AND THEIR EVALUATION ON STRAWBERRY (Fragaria × ananassa Duch.)
    (UHF,NAUNI, 2022-11) DHIMAN, VINAY KUMAR; RANA, NEERJA
    ABSTRACT Drought is the prime abiotic stress that rigorously influence plant growth, yield and quality attributes of the crops. For sustainable agriculture, drought resistant plant growth promoting rhizobacteria are new encouraging prospects, which are inexpensive and have no side effects as those of synthetic fertilizers. The present investigation was carried by isolation and enumeration of soil samples from during rainfed areas of six sites of three districts of Himachal Pradesh. The maximum bacterial count was recorded as 5.70×106 log cfu/g in Dhaula Kuan site of Sirmaur district. A total of 111 bacterial isolates were isolated from the collected soil samples. The isolates were screened for osmotic stress (-0.05MPa, -0.15MPa,-0.30MPa, -0.49MPa, -0.73MPa) attained with PEG concertation. The 41 isolates were selected after stress of -0.73 MPa with PEG 25 percent concentration. These 41 isolates were screened for ACC deaminase, EPS production, Proline, Total and free amino acids and 33 isolates were selected as drought tolerant isolates. These 33 were then screened for growth promoting traits. Among these 33 isolates 84.8 per cent isolates were P- solubilizers, 63.6 per cent were N-fixer, 93.9 per cent were Ammonia producers, 57.6 per cent were HCN producers and 60.6 per cent were siderophore producers. Out of 33 isolates quantitative estimation of 27 isolates selected and further tested for quantitative estimation of growth promoting traits The isolates SDK8 and SBU4 showed maximum potential for P- solubilization i.e., 92.86 μg/ml and 94.57 μg/ml, siderophore production of 63.12 %SU and 52.14 %SU, IAA production of 72.64 μg/ml and 74.63 μg/ml. The isolates SDK8 and SBU4 were able to grow maximum at incubation period of 48 hours, pH 7.0 and temperature of 35°C. These two isolates were tested further for their growth promoting and drought tolerating abilities in strawberry. The interactive effect of selected PGPR in strawberry plants under water stress (3,5,7 and 10 days) was performed. The plants were able to tolerate water stress upto 3,5,7 days only. Moreover, the significant increase in vegetative growth parameters with T1(PGPR1) and T2(PGPR2) alone and in combination with consortium T3(PGPR1+PGPR2) was recorded. The consortia recorded highest increase in plant height, number of leaves, leaf area, number of runners, shoot fresh and dry weight, root length, root fresh and dry weight and over uninoculated control. Treatment T3 also showed significant increase in biochemical constituents (increased level of relative leaf water content, total chlorophyll, protein and decreased level of phenol, antioxidant) in strawberry leaves. Interactive effect of water stress and recovery with selected Plant Growth Promoting Rhizobacteria (PGPR) was observed on the vegetative and fruiting characteristics of strawberry. The observations were recorded after 3, 5 and 7 days interval of water stress and recovery. The plants were statistically at par with control with PGPR after water stress for 3, 5 and 7 days and recovery. The application of PGPR showed significant increase in vegetative growth parameters with T1(PGPR1) and T2(PGPR2) alone and was highest with treatment of consortia T3(PGPR1+PGPR2) over uninoculated control. It was also found that fruit yield parameters viz. number of flowers (19.33), fruit weight (8.59g) and fruit quality the treatment viz. total soluble sugars (11.09%), titrable acidity (0.54), anthocyanin (45.89mg/100g), ascorbic acid content (42.92 mg/100g), sugar content showed maximum increase with treatment of consortia T3(PGPR1+PGPR2) compared to uninoculated control. Thus, outcome of this comparative investigation indicates that Pseudomonas fluorescens (SBU4) and Pseudomonas glycinae (SDK8) are drought tolerant and possess the multiple beneficial properties of growth promotion. Therefore, these two isolates could be utilized as bioinoculant in strawberry to improve yield and quality even under short term drought stress conditions.