Effect of natrium fluoride on growth and physiology of oryza sativa L.

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dc.contributor.authorDas, Anamika
dc.contributor.supervisorMittal, Sunil
dc.date.accessioned2018-08-30T05:10:36Z
dc.date.accessioned2018-08-30T06:09:22Z
dc.date.accessioned2024-08-13T10:50:40Z
dc.date.available2018-08-30T05:10:36Z
dc.date.available2018-08-30T06:09:22Z
dc.date.available2024-08-13T10:50:40Z
dc.date.issued2012
dc.description.abstractThe present study was undertaken to investigate the effect of natrium fluoride on growth and physiology of Oryza sativa L. Two varieties of the O. sativa (rice) viz. Basmati 1121 and PR147 were selected for the study. PR147 is a local variety of the region. The effect was studied on growth (root length and shoot length), physiological parameters (chlorophyll content and percent respiration), macromolecules and their hydrolyzing enzymes (carbohydrate and protein content, ?-amylase and protease activity) and antioxidant enzymes (peroxidase and superoxide dismutase) under controlled conditions in the laboratory. Studies revealed that NaF (in different concentrations ranging from 16, 32 and 64 mg/l) affected the growth and physiology of both varieties as compared to control. When the seed of both varieties of rice were exposed to 64 mg/l NaF concentration, the seedling growth of test plants was highly affected as compared to control. Basmati 1121 variety was found to be more sensitive than PR147. In chlorophyll content, the percent reduction at 64 mg/l of NaF was 62% in Basmati 1121 and 30% in PR147. Similarly, reduction in percent cellular respiratory ability on exposure to 64 mg/l of NaF was 75% and 22% in Basmati 1121 and PR147 variety respectively. At 64 mg/l the carbohydrate content was increased 2.9 folds in Basmati 1121 and 1.35 folds in PR147. However the protein content was variably affected as it was increased 2 folds in PR147 and decreased to nearly 55% in Basmati 1121. The macromolecular contents were affected as the activity of their hydrolyzing enzymes was also affected. The increase in oxidative stress due to high concentrations of fluoride exposure has lead to an increase in antioxidant enzyme activity of both peroxidase and superoxide dismutase enzymes. The study concludes that high content of fluoride affects the growth and physiology of O. sativa L. by inducing oxidative stress.en_US
dc.identifier.accessionnoT00004
dc.identifier.citationDas, Anamika (2012) Effect of natrium fluoride on growth and physiology of oryza sativa L.en_US
dc.identifier.urihttp://10.2.3.109/handle/32116/1724
dc.language.isoen_USen_US
dc.publisherCentral University of Punjaben_US
dc.subjectNatrium Fluoride Toxicityen_US
dc.subjectReactive Oxygen Speciesen_US
dc.subjectSuperoxide Dismutaseen_US
dc.subjectPR147en_US
dc.subjectBasmati 1121en_US
dc.titleEffect of natrium fluoride on growth and physiology of oryza sativa L.en_US
dc.typeMphil Dissertationen_US

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