Radiation synthesis of sodium alginate/gelatin based ultra-absorbent hydrogel for efficient water and nitrogen management in wheat under drought stress.

Autor: El-Diehy MA; Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Cairo, Egypt., Farghal II; Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Cairo, Egypt., Amin MA; Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Cairo, Egypt., Ghobashy MM; Radiation Research of Polymer Chemistry Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt. Mohamed_ghobashy@yahoo.com., Nowwar AI; Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Cairo, Egypt., Gayed HM; Radiation Research of Polymer Chemistry Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt. hanygayed83@gmail.com.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2024 Aug 22; Vol. 14 (1), pp. 19463. Date of Electronic Publication: 2024 Aug 22.
DOI: 10.1038/s41598-024-69333-3
Abstrakt: The main focus of this study was on using radiation to make an ultra-absorbent hydrogel (UAH) from sodium alginate (SA) and gelatin (GL) biopolymers. This UAH can effectively handle water and nitrogen in wheat farming during drought stress. The hydrogel was synthesized by gamma irradiation-induced SA/GL/polyacrylamide crosslinking at 10-40 kGy. Varying SA/GL ratios affected swelling and the gel fraction of SA/GL/PAm hydrogels. The (SA/GL 17/83) hydrogel exhibited a 40.03 g/g swelling degree, while increasing SA content resulted in higher swelling, peaking at 75.5 g/g for (SA/GL 83/17). This indicated a synergistic interaction between SA and GL. The gel fraction also increased from 76.8 to 90.3%, with a higher GL content reflecting increased crosslinking. After multiple hydrolysis cycles, the hydrogel achieved 1293 (g/g) swelling and 36 days of water retention. When applied to wheat (Triticuma estivum) under drought stress, it significantly improved shoot length (18%), root length (43%), shoot fresh weight (49%), and shoot dry weight (51%) under extreme drought. The significant increases in protein and carbohydrate content in both shoots (up to 32% and 19%, respectively) and grains (up to 21% and 24%, respectively), along with the reduction in proline content (up to 38%), demonstrate that ultra-absorbent hydrogel (UAH) effectively enhances nitrogen content, photosynthesis, and overall plant health in wheat under varying drought stress levels. This novel SA/GL-based UAH holds promise for addressing water scarcity and agricultural challenges, offering a sustainable solution for water and nitrogen management under drought stress.
(© 2024. The Author(s).)
Databáze: MEDLINE
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