Seed Priming with Nanoparticles and 24-Epibrassinolide Improved Seed Germination and Enzymatic Performance of Zea mays L. in Salt-Stressed Soil.
Seed Priming with Nanoparticles and 24-Epibrassinolide Improved Seed Germination and Enzymatic Performance of Zea mays L. in Salt-Stressed Soil.
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DOI：
10.3390/plants12040690
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发表时间：
2023-02-04
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盐胁迫是影响作物产量的重要非生物胁迫因子之一。然而，新兴的纳米技术，纳米肥料和光敏色素的发展知识可以潜在地减轻盐胁迫对种子萌发的负面影响。因此，本研究的目的是研究用氧化锌纳米颗粒（ZnO-NPs; 50和100 mg L−1）或24-表油菜素（EBL; 0.2和0.4 μM）及其组合对玉米（Zea mays L.）在盐胁迫土壤（50和100 mM NaCl）中播种的谷物。盐胁迫处理显著影响了种子的萌发特性、化学成分和α-淀粉酶活性。与未引发的种子相比，ZnO-NPs和EBL及其组合引发显著提高了盐胁迫下玉米种子的累积发芽率、发芽势、吸胀速率、粒重、K+含量和α-淀粉酶活性，显著降低了萌发时间、50%出苗天数、Na+吸收量和Na+/K+比值。与所有其他单独和组合处理相比，100 mg ZnO-NPs L−1 + 0.2 μM EBL的组合导致在盐胁迫土壤中播种的玉米种子的大多数研究性状的最大改善。
Saline stress is one of the most critical abiotic stress factors that can lessen crops’ productivity. However, emerging nanotechnology, nano-fertilizers, and developing knowledge of phytochromes can potentially mitigate the negative effects of saline stress on seed germination. Therefore, the aim of this study was to investigate the effects of seed priming either with zinc oxide nanoparticles (ZnO-NPs; 50 and 100 mg L−1) or 24-epibrassinolide (EBL; 0.2 and 0.4 μM) and their combinations on maize (Zea mays L.) grains sown in salt-stressed soil (50 and 100 mM NaCl). Saline stress treatments significantly affected all germination traits and chemical analysis of seeds as well as α-amylase activity. Compared to un-primed seeds, seed priming with ZnO-NPs or EBL and their combinations significantly increased the cumulative germination percentage, germination energy, imbibition rate, increase in grain weight, K+ content, and α-amylase activity, and significantly reduced germination time, days to 50% emergence, Na+ uptake, and Na+/K+ ratio of maize sown in salt-stressed-soil (50 or 100 mM NaCl). The combination of 100 mg ZnO-NPs L−1 + 0.2 μM EBL resulted in the highest improvements for most of the studied traits of maize seeds sown in salt-stressed soil in comparison to all other individual and combined treatments.