Effect of salt stress on the morphophysiological, yield and quality parameters in isabgol (Plantago ovata Forsk.) genotypes

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dc.contributor.advisorVarshney, U.K.
dc.contributor.authorSuraj Kala
dc.date.accessioned2017-06-03T03:22:37Z
dc.date.available2017-06-03T03:22:37Z
dc.date.issued2014
dc.description.abstractEffect of NaCl salt stress on the morpho-physiological, yield and quality parameters in four isabgol (Plantago ovata Forsk.) genotypes viz. GI-2, HI-96, PB-80 and HI-5 was studied under screen house conditions. All the genotypes were grown in the dune sand filled polythene bags with control (without salt), 5 and 10 dSm-1 EC level of NaCl salt solution along with nutrients. Sampling was done at vegetative (58 DAS), flowering (115 DAS) and maturity (150 DAS) stage of growth. Results revealed a significant reduction in various plant growth parameters at every growth stages with increasing salt stress. Root/shoot ratio remained indifferent with the increasing salt stress level up to flowering stage but an increase in the ratio was observed at the maturity stage. Both reproductive effort as well as reproductive capacity of all the isabgol genotypes decreased with increasing salt stress. Reduction in plant growth, in general was maximum in the genotype PB-80 and minimum in GI-2. Increasing salt stress caused reduction in various yield attributes in all the isabgol genotypes. Mucilage (%) as well as seed swelling factor of all the isabgol genotypes also significantly declined under salt stress. Decline in yield as well as quality parameters was highest in the genotype PB-80 and lowest in GI-2. On the other hand increasing EC level caused enhancement of RMI, lipid peroxidation and ROS content in all the isabgol genotypes. The increase was maximum in the genotype PB-80 and minimum in GI-2. Chlotrophyll, carotenoid, ascorbic acid and total soluble protein content in leaves of all the isabgol genotypes decreased with increasing salt stress level and maximum decrease was found in the genotype PB-80 and minimum in GI-2. An accumulation of proline and total soluble carbohydrate content in leaves of all the isabgol genotypes was detected with the increase of salt stress; increase being maximum in the genotype GI-2 and minimum in PB-80. The enhancement in the activity of antioxidant enzymes viz., CAT, SOD and POD with the increase of salt stress was also highest in GI-2 and lowest in PB-80 among all the genotypes. In the Protein profile of leaves of the genotype GI-2 three new protein bands of the MW 29.59, 54.95 and 55.72 kDa and in the genotype HI-96 two new protein bands of the MW 29.59 and 55.72 kDa were detected under salt stress. While in the genotype PB-80 one protein band of MW 30.06 kDa was disappeared and one new protein band of MW 43.65 kDa was appeared under salt stress. Genotype HI-5 showed three new protein bands of MW 43.65, 55.72 and 66.07 kDa and disappearance of one protein band of MW 32.36 kDa under salt stress. The de novo synthesis of new protein bands under salt stress could be responsible for induction of salt tolerance in isabgol genotypes. While in the genotype PB-80 and HI-5 disappearance of protein bands may be viewed as marker of their salt sensitivity. Sodium and chloride content in different plant parts of isabgol genotypes increased while potassium content decreased with increasing EC level. Maximum sodium and chloride content was found in the genotype PB-80 and minimum in GI-2. Potassium content on the other hand was highest in the genotype GI-2 and lowest in PB-80. Based on the overall performance of all the genotypes under present study with respect to various morpho-physiological, yield and quality parameters, the genotype GI-2 was found to be most tolerant and the genotype PB-80 least tolerant to salt stress. Relative order of salt tolerance of different isabgol genotypes was GI-2>HI-96>HI-5>PB-80.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810014111
dc.language.isoenen_US
dc.publisherCCSHAUen_US
dc.subBotany
dc.subjectgenotypes, food preservation, biological development, planting, developmental stages, vegetative propagation, sowing, proteins, biological phenomena, dryingen_US
dc.these.typePh.D
dc.titleEffect of salt stress on the morphophysiological, yield and quality parameters in isabgol (Plantago ovata Forsk.) genotypesen_US
dc.typeThesisen_US
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