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Silicon nanoparticles alleviate arsenic toxicity in rice (Oryza sativa L.) | ||
| Journal of Plant Physiology and Breeding | ||
| مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 09 خرداد 1401 | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22034/jppb.2022.47857.1239 | ||
| نویسندگان | ||
Tahereh Kiany1؛ Leila Pishkar  1؛ Nasrin Sartipnia1؛ Alireza Iranbakhsh2؛ Giti Barzin1
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| 1Department of Biology, Islamshahr Branch, Islamic Azad University, Islamshahr, Iran | ||
| 2Department of Biology, Science and Research Branch, Islamic Azad University, Teheran, Iran | ||
| چکیده | ||
| Arsenic (As) is known to be one of the most toxic metalloids for humans and plants, however, little is known about the use of silicon (Si) nanoparticles (NPs) in reducing the As toxicity in rice (Oryza sativa L.). An experiment was conducted to examine the effects of Si-NPs (50 and 100 mg/L) and As (50 µM) on growth, photosynthetic pigments, antioxidant defense system, and expression of Si/As transporters in rice under hydroponic conditions in 2020 at Islamshahr Branch, Islamic Azad University, Islamshahr, Iran. The results revealed that Si-NPs by upregulating the activity of antioxidant enzymes, reduced hydrogen peroxide and malondialdehyde, and thus, protected the photosynthetic apparatus and improved plant growth under the As stress. By increasing the expression of GSH1, PCS, and ABC1 genes, Si-NPs increased leaf and root accumulation of glutathione and phytochelatins and sequestered As in vacuoles, which protected plant cells from the toxic As. Si-NPs diminished the As uptake and increased the Si uptake in the As-exposed rice plants by modulating the expression of Si/As transporters (Lsi1, Lsi2, Lsi6). In general, Si-NPs augmented the growth of rice under the As stress through different strategies, which can be used to design effective fertilizers to enhance crop growth and yield in the areas contaminated with As. | ||
| کلیدواژهها | ||
| Arsenic؛ Nanoparticles؛ Oxidative stress؛ Rice؛ Phytochelatins؛ Si/As transporters | ||
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آمار تعداد مشاهده مقاله: 13 |
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