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Subject: Plant Physiology ×
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Now showing 1 - 7 of 7
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    ThesisItemOpen Access
    STUDIES ON POTIMUM STRATIFICATION FOR ESTIMATING APPLE [MALUS DOMESTICA) PRODUCTION IN SHIMAL DISTRICT OF HIMACHAL PRADESH
    (DR. YASHWNAT SINGH PARMAR UNIVERSITY OF HORTICULTURE AND FORESTRY NAUNI SOLAN, 2002) KUMAR, SATISH; MAHAJAN, P. K
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    ThesisItemOpen Access
    TESTING LEAF EXTRACTS OF IPOMOEA AND LANTANA FOR POTENTIAL ROOT FORMING FACTOR ON PEACH VARIETIES
    (DR. YASHWNAT SINGH PARMAR UNIVERSITY OF HORTICULTURE AND FORESTRY NAUNI SOLAN, 1994) BHARDWAJ, JYOTSNA; THAKUR, P. S
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    ThesisItemOpen Access
    STUDY OF GROWTH REGULATOR DYNAMICS (INDOLES AND PHENOLS) IN FORCED SALIX SHOOT BUD WITH AGE
    (DR. YASHWANT SINGH PARMAR UNIVERSITY OF HORTICULTURE AND FORESTRY ; SOLAN, 1994) VAID, NIVEDITA; SHARMA, VEENA
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    ThesisItemOpen Access
    PHYSIOLOGICAL AND BIOCHEMICAL CHANGES IN APPLE, MALUS DOMESTICA BORKH. CV. ROYAL DELICIOUS FRUIT DURING GROWTH AND RIPENING
    (DR. YASHWNAT SINGH PARMAR UNIVERSITY OF HORTICULTURE AND FORESTRY NAUNI SOLAN, 1993) SHAROTRI, VISHAL; PLANT PHYSIOLOGY
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    ThesisItemOpen Access
    CHARACTERISTICS OF RHIZOBIUM STRAINS OF ACACIA CATECHU WILD. GROWN AT DIFFERENT LOCATIONS
    (DR. YASHWNAT SINGH PARMAR UNIVERSITY OF HORTICULTURE AND FORESTRY NAUNI SOLAN, 1993) JAISWAL, SHASHI; SHIRKOT, C. K.
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    ThesisItemOpen Access
    EFFECT OF WATER STRESS AND BRASSINOSTEROID ON GROWTH AND PHYSIO - BIOCHEMICAL CHARACTERISTICS OF APPLE PLANTS
    (UHF,NAUNI, 2017) SUDARSHNA, KUMARI; THAKUR, ANJU
    ABSTRACT The present study entitled “Effect of water stress and brassinosteroid on growth and physio-biochemical characteristics of apple plants” was conducted in the field of the Department of Fruit Science and Plant Physiology laboratory of Basic Sciences, Dr. Y.S. Parmar University of Horticulture and Forestry, Nauni, Solan, Himachal Pradesh during January - June 2016. The objective of the experiment was to study the effects of imposed water stress and brassinosteroid on growth and physio-biochemical responses of apple plants. One year old plants of both varieties i.e. Super chief and Red chief were pre-treated by foliar application of brassinosteroid 0.05 and 0.10 ppm, three days before subjecting to stress. Water stress conditions were imposed by withholding watering for 15 and 30 days. Growth characteristics viz. plant height, branch number, leaf area, root length, fresh and dry weight of root and shoot and root-shoot ratio showed significant reduction under water stress. The maximum reduction in growth parameters was registered by plants subjected to 30 of water stress as compared to 15 days of water stress. Physiological indices viz. photosynthesis, chlorophyll fluorescence, canopy temperature depression, transpiration rate, stomatal conductance and water use efficiency showed inhibitions under both water stress durations with maximum reduction under 30 days of water stress than the control for both cultivars. Osmoregulating substances i.e. total free amino acid, total free proline and total soluble sugars showed increased accumulation and enhanced activities of antioxidant enzymes i.e. catalase and peroxidase with increasing duration of water stress which helped in enhancing drought tolerance. However brassinosteroid at both concentrations could help in maintaining vital growth, physiological and biochemical processes under water stress conditions. Foliar spray of brassinosteroid (0.05 ppm) prior to imposition of stress can pave the way to minimize the deleterious effects of water stress on apple plants.
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    ThesisItemOpen Access
    EFFECT OF SEED INVIGORATION TREATMENTS ON GERMINATION PHYSIOLOGY OF Angelica glauca Edgew. AND Rauvolfia serpentina (L.) Benth. ex Kurz – ENDANGERED MEDICINAL SPECIES
    (UHF,NAUNI, 2016) SAYAL, NEHA; THAKUR, ANJU
    ABSTRACT The present investigation entitled “Effect of seed invigoration treatments on germination physiology of Angelica glauca Edges. andRauvolfia serpentine (L.) Benth. Ex Kurz-endangered medicinal species” was conducted in the Plant Physiology laboratory of Basic Sciences, Dr.Y.S. Parmar University of Horticulture and Forestry, NauniSolan (H.P.) during 2013-15. The objectives of the study were to identify the superior population of both the species; to induce germination and vigour and to understand physio-biochemical patterns. The seeds of Angelica glauca and Rauvolfia serpentine were subjected to eighteen invigoration treatments out of which the maximum germination percentage (41.11%) in seeds of A. glauca was observed with GA3100 ppm for 72 hrs, which was closely followed by KNO3 500 ppm for 48 hrs (35.55%), PEG 6000 at -0.5 MPa for 12 hrs (33.33%) and thiourea 200 ppm for 30 mins (31.11%) respectively. In R. serpentine untreated seeds did not show germination whereas, the maximum germination percentage (36.67%) was observed in seeds subjected to GA3 200 ppm for 48 hrs, which was closely followed by GA3 100 ppm for 48 hrs (28.89%), KNO3 1% for 48 hrs (23.33%) and chilling at 5oC for 4 weeks as well as thiourea 0.5% for 48 hrs (22.22%). Higher germination in above treatments was coupled with early onset of germination, shortest mean germination time, higher seedling vigour indices and higher enzyme activities. The patterns of changes in physio-biochemical parameters viz. alpha-amylase, protease and dehydrogenase, soluble sugars and phenol content was found to be closely related with germination and vigour, reflecting the underlying physio-biochemical changes in seeds subjected to invigoration treatments. Henceforth, it is concluded that above seed treatments can pave the way for improving germination and vigour of A. glauca and R. serpentine which otherwise show very low and erratic germination.