Search

Your search keyword '"Janah, Iman"' showing total 7 results
Start Over Author "Janah, Iman"
7 results on '"Janah, Iman"'

5. The Induction of Salt Stress Tolerance by Gibberellic Acid Treatment in Stevia rebaudiana Bertoni Plants.

Author

Janah, Iman, Ben-Laouane, Raja, Elhasnaoui, Abdelhadi, Anli, Mohamed, and Meddich, Abdelilah

Subjects
*STEVIA rebaudiana, *GIBBERELLIC acid, *BETAINE, *POLYPHENOL oxidase, *SOIL salinization, *PLANT performance
Abstract

Salinity poses a perpetual threat to agricultural lands, presenting an ongoing challenge to global food security. The present study aimed to explore the potential benefits of gibberellic acid (GA3) in enhancing stevia's tolerance to salt stress. The experimental treatments comprised a control group (C) with 0 mM NaCl, salt stress (S) with 80 mM NaCl, 50 ppm of GA3 (G1), 100 ppm of GA3 (G2), as well as combinations of GA3 with salt stress (G1+S and G2+S). Exposure to saline water (80 mM NaCl) significantly decreased plant growth, water status, and photosynthetic attributes. However, it also led to notable increases in proline, glycine betaine, malondialdehyde (MDA), and antioxidant enzyme activities compared to the control treatment. Application of 100 ppm of GA3 effectively alleviated salt stress by enhancing plant performance under saline conditions, as evidenced by increased aerial (54%) and root (31%) dry weights compared to the control. Additionally, GA3 treatment resulted in elevated activities of polyphenol oxidase (24%), peroxidase (12%), superoxide dismutase (31%), and catalase (11%) while reducing MDA content by 41%, electrolyte leakage by 37%, and hydrogen peroxide by 34%. The use of phytohormones such as GA3 emerges as a promising strategy for mitigating salt stress-induced damage. It not only enhances plant performance but also reduces oxidative stress, offering protection against the detrimental effects of soil salinization. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

7. Arbuscular Mycorrhizal Fungi Mitigates Salt Stress Toxicity in Stevia rebaudianaBertoni Through the Modulation of Physiological and Biochemical Responses

Author

Janah, Iman, Meddich, Abdelilah, Elhasnaoui, Abdelhadi, Khayat, Sara, Anli, Mohamed, Boutasknit, Abderrahim, Aissam, Salama, and Loutfi, Kenza

Abstract

Salinization of soil is a major problem affecting many plant physiological processes. The use of arbuscular mycorrhizal fungi (AMF) plays a key role in improving the growth and the crops yield. The aim of this study was to evaluate the combined effects of salt stress and AMF on agro-physiological and biochemical responses of Stevia rebaudianaBertoni. The experiment was carried out in a completely randomized design with ten replicates under the green house conditions. Stevia plants were inoculated with AMF consortium (MC) or with Rhizophagus irregularis(Ri) on the presence (80 mM of NaCl) or the absence (0 mM of NaCl) of salt stress. The results showed that plant height, dry biomass of shoots and roots parts, mycorrhizal frequency and intensity, relative water content, chlorophyll fluorescence, stomatal conductance, chlorophyll a, and total chlorophyll were significantly reduced by 29%, 72%, 36%, 84%, 65%, 24%, 17%, 60%, 28.50%, and 40.9% respectively under salt stress. These changes were associated with a significant increase in antioxidant enzymes (activity of polyphenol oxidase, peroxidase, superoxide dismutase, and catalase), electrolyte leakage, lipid peroxidation, and hydrogen peroxide contents. The application of AMF (MC and Ri) improved growth and physiological parameters through rising the activities of antioxidant enzymes and reduction of the oxidative damage caused by the salt stress. The better results were recorded with MC-inoculated plants. These findings suggested that AMF could be an effective strategy to alleviate the adverse effects of salt stress on Stevia rebaudiana.

Published
2023
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results