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ThesisItem Open Access INTERACTION BETWEEN MATERNAL PARENT AND OFFSPRING OVER RESOURCE MOBILISATION INTO DEVELOPING SEEDS : PROXIMATE CAUSES AND ULTIMATE STRATEGIES(University of Agricultural Science, Dharwad, 1997) Ravishankar, K V; Uma Shankar, RABSTRACT NOT AVAILABLEThesisItem Open Access SALT TOLERANCE STUDIES IN COTTON (Gossypium spp.)(University of Agricultural Science, Dharwad, 1999) Rajgopal; Patil, B C"Investigation on salt tolerance in cotton was made with nine genotypes, belonging to Gossypium arboreum (AK 235, CIMA 302 and AKH 4) G. herbaceum (Jayadhar and Dhumad) and G. hirstum (JK-276-10-5, JK 345-3-3, LRA 5166 and AK 84635), under five salinity levels in pot and field conditions. The objective was to study the changes in physiological, biochemical parameters, yield potential and their relationship under varying salinity levels and finally to find out the mechanism of salt tolerance in cotton. The results showed that germination, shoot and root vigour index, leaf area and total dry matter (30 and 60 DAS) decreased with increase in salinity level. The relative decrease was lower in AK 235 and LRA 5166 as compared to other genotype. Stomatal density Increased while stomatal conductance, stomatal size, transpiration rate, photosynthetic rate and osmotic potential decreased with increase in salinity level. The genotype AK 235 showed lower reduction in these characters whereas maximum reduction was observed in AKH 4. Sodium content in stem and leaf increased with increase in salinity, while potassium and calcium content decreased. At higher salinity levels K/Na ratio was maintained in genotypes AK 235, AK 84635 and LRA 5166 by restricting Na+ uptake and increased K+ uptake in to the shoot indicating salt tolerance. In general, chlorophyll a, chlorophyll b, total chlorophyll content, soluble protein and catalase activity decreased with increase in salinity whereas, free proline, peroxidase activity and sugar content increased in all the genotypes. Seed cotton yield, total dry matter and leaf area at different stages of crop growth reduced with increase in salinitv. The higher mean salinity index, tolerance index and lower slope of regression for seed cotton yield and total dry matter at harvest in AK 235, LRA 5166, AK 84635 and Jayadhar indicated their suitability to salt stress conditions. Based on the study the genotypes AK 235, LRA 5166 and AK 84635 were found to be tolerant to salinity stress. Lesser reduction in germination, shoot and root vigour indices, photosynthetic rate, stomatal conductance, leaf area, total dry matter and chlorophyll content, maintenance of higher K/Na ratio and higher catalase and peroxidase activity at higher salinity levels can serve as selection criteria for identification of salinity tolerance at eariy stages of crop growth in cotton."ThesisItem Open Access "IMMUNOQUANTIFICATION OF PREDOMINANT CYTOKININS : ROLE OF CYTOKININ OXIDASE UNDER STRESS"(University of Agricultural Science, Dharwad, 1997) MANJUR, V; Sashidhar, V RABSTRACT NOT AVAILABLEThesisItem Open Access "INFLUENCE OF BRASSINOSTEROIDS ON GROWTH. DEVELOPMENT AND PRODUCTIVITY IN INFLUENCE OF BRASSINOSTEROIDS ON GROWTH. DEVELOPMENT AND PRODUCTIVITY IN CROP PLANTS"(University of Agricultural Science, Dharwad, 1998) VIVENCY, A J; PRASAD, T GABSTRACT NOT AVAILABLEThesisItem Open Access "CANOPY TEMPERATURE, CROP CANOPY AIR TEMPERATURE DIFFERENCE AS A SCREENING TECHNIQUE FOR DEHYDRATION POSTPONEMENT UNDER WATER STRESS IN FINGER MILLET (Eleucine coracana, Gaertn"(University of Agricultural Science, Dharwad, 1996) ANKEGOWDA, S J; SASHIDHAR, V RABSTRACT NOT AVAILABLEThesisItem Open Access "RESPONSE OF CROP PLANTS TO ELEVATED CO2 STUDIES ON PHOTOSYNTHETIC ACCLIMATION"(University of Agricultural Science, Dharwad, 1996) NATARAJA KARABA, N; PRASAD, T GABSTRACT NOT AVAILABLEThesisItem Open Access "MECHANISM OF SEED ABORTION IN Syzygium cuminii (L.) Skeels. AND THE ROLE OF SELF ORGANISED FLOW OF RESOURCES TO SINKS IN DIFFERENTIAL DEVELOPMENT OF SEEDS IN PLANTS"(University of Agricultural Science, Dharwad, 1995) KRISHNAMURTHV, K; UMA SHAANKER, R SABSTRACT NOT AVAILABLEThesisItem Open Access "PROTOPLAST ISOLATION AND REGENERATION STUDIES IN SELECTED SOLANACEAOUS CROPS"(University of Agricultural Science, Dharwad, 1996) PRAKASH, A H; Sankara Rao, KABSTRACT NOT AVAILABLEThesisItem Open Access "GENETIC VARIABILITY IN SALINITY TOLERANCE IN RICE (On za sativa L ) AND FINGER MILLET (Eleusine coracana G.) : THE RELEVANCE OF LEA 2 AND LEA 3 PROTEINS"(University of Agricultural Science, Dharwad, 1996) JAYAPRAKASH, T L; Udayakumar, MABSTRACT NOT AVAILABLE