PJB-2019-454
Role of foliar application of putricine in salt stress tolerance of sunflower
Humaira Gul
Abstract
Presence of salt in soil and water is one of the most serious problems in agriculture that hampers crop productivity all over the world. There are different methods to ameliorate the effect of salinity on plant growth and yield. Present research work was undertaken to evaluate the ameliorative role of exogenously applied putricine with reference to growth and biochemical parameters of Helianthus annuus grown under salinity stress. Plants exposed to different levels of salt (50mM, 100mM and 150mM) and then foliarly applied with different doses (0.1mM, 1mM and 2mM) of putricine. Exposure of plants to salt significantly reduce the growth parameters (Plant height, root length, number of leaves, fresh and dry biomass, seed number and weight per plant), endogenous IAA content, content of chlorophyll, reducing and non-reducing sugars, total carbohydrates and total proteins. In the same conditions enhanced levels of secondary metabolites (Phenols, lycopene, beta carotene, terpenoids and total antioxidants) were observed in plants. Putricine application induced stimulatory effect and improved above mentioned parameters before and after salt treatment. Results of present investigation suggest that foliar application of putricine may have protective role for Helianthus annuus and creating potential for increasing tolerance in this plant for salinity stress.
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