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Salinity affects the growth and quality of rose (Rosa damascena)

Soil salinity is an important abiotic factor that adversely affects plant growth. In present study, response of rose (Rosa damascena) was evaluated to various NaCl salinity levels developed by irrigating saline water. Plants were irrigated with different salinities, viz. 0 (control), 50, 100, 150, 200 and 250 mM NaCl. After treatments application, plants were sampled, and relative growth rate (RGR) was calculated. Growth rates were significantly reduced as recorded for flower diameter, number of leaves per plant, number of shoots per plant, number of flowers per plant, number of petals per flower, fresh and dry weight of flower and petals. Results depicted that plant growth and yield significantly reduced with increase in salt concentration particularly when >150 mM NaCl was applied. Therefore, it is suggested that Rosa damascena may be best grown when salinity level of ≤150 mM and should not be grown in areas where salt concentrations are greater than 150 mM.