使用超吸收性糊精-聚丙烯酰胺水凝胶作为土壤改良剂,改善干旱胁迫下太阳花的生长和生化性状

IF 2.3 Q1 AGRICULTURE, MULTIDISCIPLINARY ACS agricultural science & technology Pub Date : 2024-01-12 DOI:10.1021/acsagscitech.3c00465
Samera Ali Al-Gahtany, Abeer S. Meganid, Dalal Mohamed Alshangiti, Sheikha A. Alkhursani, Mohamed Mohamady Ghobashy, Mohamed A. Amin, Tasneam K. El-Damhougy*, Atheer S. Almutairi and Mohamed Madani*, 
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引用次数: 0

摘要

干旱胁迫严重影响植物的生长和生产力,包括向日葵(Helianthus annuus L.)。特别是由糊精和聚丙烯酰胺组成的超吸水性水凝胶为缓解干旱胁迫和提高向日葵的生化特性提供了一种潜在的解决方案。本研究探讨了共聚物组成对通过自由基聚合合成的糊精(Dix)/聚丙烯酰胺(PAAm)水凝胶的凝胶成分、溶胀行为、保水性、形态和化学结构的影响。结果表明,Dix/PAAm 水凝胶的比例为 50/50,具有理想的特性,包括异质孔隙结构(约 100 μm)和较高的吸水能力,这归功于较高的 Dix 含量。在盆栽实验中,(Dix/PAAAm)水凝胶在缓解干旱胁迫对向日葵的生长、叶绿素含量、鲜枝重量和色素的有害影响方面发挥了关键作用。水凝胶的应用通过提高保水性、养分可用性和对干旱胁迫的生理反应,对这些参数产生了积极影响。总之,这些研究结果凸显了(Dix/PAAm)水凝胶作为一种有效工具的潜力,可增强植物对干旱胁迫的抗逆性,促进向日葵的生长和生化性状。
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Enhancing Growth and Biochemical Traits of Helianthus annuus L. Under Drought Stress Using a Super Absorbent Dextrin–Polyacrylamide Hydrogel as a Soil Conditioner

Drought stress significantly affects plant growth and productivity, including sunflowers (Helianthus annuus L.). Superabsorbent hydrogels, specifically composed of dextrin and polyacrylamide, offer a potential solution to mitigate drought stress and enhance the biochemical traits of sunflowers. This study explored the impact of copolymer composition on the gel fraction, swelling behavior, water retention, morphology, and chemical structure of dextrin (Dix)/polyacrylamide (PAAm) hydrogels synthesized via radical polymerization. Results revealed that the 50/50 ratio of the Dix/PAAm hydrogel exhibited desirable characteristics, including a heterogeneous pore structure (approximately 100 μm) and higher water absorption capacity attributed to a greater Dix content. In a pot experiment, the (Dix/PAAm) hydrogel played a crucial role in alleviating the harmful effects of drought stress on the growth, chlorophyll content, fresh shoot weight, and pigments in sunflowers. The hydrogel application positively influenced these parameters by enhancing water retention, nutrient availability, and physiological responses to drought stress. Overall, these findings highlight the potential of the (Dix/PAAm) hydrogel as an effective tool for enhancing plant resilience to drought stress and promoting growth and biochemical traits in sunflowers.

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