Effect of ultraviolet radiation treatment to increase the ability of Gypsophila elegans Crimson to tolerate salinity

Document Type : Original Article

Authors

1 Ornamental Plants and Landscape Gardening Research Department, Horticulture Research Institute, Agriculture Research Center, Giza, Egypt.

2 Botanical Gardens Department, Horticulture Research Institute, A.R.C., Giza, Egypt

10.21608/jsrs.2025.396369.1187

Abstract

This experiment was designed at the Horticultural Research Institute, Ornamental Department Nursery, in two consecutive years 2021-2022 and 2022-2023. The experiment was directed to improve the tolerance of Gypsophila elegans Crimson to salinity by planting gypsophila seeds after treating them with UV rays  for 0, 1, 2 or 4 hours in seed growing beds, then they were transplanted after the seedlings became 8 to 10 cm long in pots. The plants were irrigated with water containing sodium chloride in concentrations of (0, 1000, 2000 or 4000 ppm).
The experiment has proven that the treatment with ultraviolet ray had significant improvement in plant height, fresh and dry weight of plant, early flowering, enhanced floral traits and increased levels of chlorophyll (a and b), total carbohydrates and proline were observed with longer exposure periods, reaching the highest results after 2 hours of exposure compared to unexposed seeds.
Exposure to UV treatments for plants treated with different salinity levels had a significant effect in improving all vegetative and floral traits, as treating seeds with UV rays for one or two hours before planting removed the harmful effect of salinity at a concentration of 1000 or 2000 ppm for most vegetative and floral traits and leaf content of chlorophyll (a and b) and carbohydrates in leaves with significant superiority for the two hours radiation.
Gypsophila exhibits partial salinity tolerance; however, higher salinity levels reduce vegetative and floral traits, decrease chlorophyll (a and b) content, increase the proline accumulation in the leaves.

Keywords

Journal of Scientific Research in Science
Volume 42, Issue 3
Special issue (Fruit, Ornamental and Woody Plants)
2025
Pages 132-152

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