Abstract

This study was carried out to investigate the effects of nano titanium dioxide nanoparticles (TiO₂ NPS), on seed germination and germination indices of Grass pea (Lathyrus sativus L.) seed under drought stress. A factorial experiment was arranged based on a completely randomized design with three replicates to study the impacts of TiO₂ nanoparticles (TiO₂ NPs: 0, 20, 40, 60, and 80 ppm) on seed germination and seedling growth of grass pea under Polyethylene glycol (PEG) induced drought stress different (–0.00, –0.27, ‒0.53, and –0.80 MPa, respectively) were tried in a preliminary experiment. Our results revealed that PEG-stimulated drought stress significantly decreased germination percentage, germination energy, germination rate, root length, shoot length, root fresh weight, shoot fresh weight and vigor index but increased mean germination time in grass pea seeds. However, the application of TiO₂ NPS protects Grass pea plants against drought stress and improves the Germination parameter, plant root length, shoot length, root fresh weight, shoot dry weight, root dry weight and shoot fresh weight in 20 ppm TiO₂ NPS compared to control. Finally, In conclusion, the application of TiO₂ NPS may protect Grass pea plants against drought stress by improving morphological growth.

中文翻译：

---

纳米TiO 2对干旱胁迫下豌豆种子萌发和生长特性的影响。

摘要

本研究旨在研究纳米二氧化钛纳米颗粒（TiO ₂ NPS）对干旱胁迫下豌豆（Lathyrus sativus L.）种子种子萌发和萌发指数的影响。在完全随机设计的基础上安排了析因实验，包括三个重复实验，以研究TiO ₂纳米颗粒（TiO ₂在聚乙二醇（PEG）诱导的干旱胁迫下，豌豆种子萌发和幼苗生长上的NPs：0、20、40、60和80 ppm）不同（分别为–0.00，–0.27，‒0.53和–0.80 MPa）在初步实验中进行了尝试。我们的研究结果表明，PEG刺激的干旱胁迫显着降低了豌豆种子的发芽率，发芽能，发芽率，根长，枝长，根鲜重，枝鲜重和活力指数，但增加了平均发芽时间。然而，TiO ₂ NPS的应用可保护豌豆植物免受干旱胁迫，并改善了在20 ppm TiO _2中发芽参数，植物根长，枝长，根鲜重，枝干重，根干重和枝鲜重。NPS与对照相比。最后，结论是，TiO ₂ NPS的应用可以通过改善形态生长来保护豌豆植物免受干旱胁迫。