Department of Environment and Natural Resources, Faculty of Agriculture and Food Science, King Faisal University, Al-Ahsa, Saudi Arabia.
Department of Soil and Water, Faculty of Agriculture, Kafrelsheikh University, Kafr El Sheikh, 33516, Egypt.
Environ Sci Pollut Res Int. 2017 Sep;24(27):21917-21928. doi: 10.1007/s11356-017-9847-y. Epub 2017 Aug 5.
During the past 10 years, exploiting engineered nanoparticles in agricultural sector has been rapidly increased. Nanoparticles are used to increase the productivity of different crops particularly under biotic and abiotic stresses. This study aims to test the ability of nanosilica (NS) to ameliorate the detrimental impact of Na with different concentrations on the seed germination and the growth of common bean seedlings. Five doses of Na have been prepared from NaCl, i.e., 1000, 2000, 3000, 4000, and 5000 mg L, and distilled water was applied as a control. Seeds and seedlings were treated with three different NS concentrations (100, 200, and 300 mg L). The results proved that Na concentrations had detrimental effects on all measured parameters. However, treating seeds and seedlings with NS improved their growth and resulted in higher values for all measurements. For instance, the addition of 300 mg L NS leads to an increase of the final germination percentage, vigor index, and germination speed for seeds irrigated with 5000 mg Na L by 19.7, 80.7, and 22.6%, respectively. Although common bean seedlings could not grow at the highest level of Na, fortification seedlings with NS helped them to grow well under 5000 mg L of Na. An increase of 11.1 and 23.1% has been measured for shoot and root lengths after treating seedlings with 300 mg L NS under irrigation with 5000 mg Na L solutions, and also at the same treatment, shoot and root dry masses are enhanced by 110.9 and 328.0%, respectively. These results proved the importance of using NS to relieve the detrimental effects of Na-derived salinity. This finding could be reinforced by low Na content which was measured in plant tissues after treating seedlings with 300 mg L of NS.
在过去的 10 年中，农业领域对工程纳米粒子的利用迅速增加。纳米粒子被用于提高不同作物的生产力，特别是在生物和非生物胁迫下。本研究旨在测试纳米硅（NS）缓解不同浓度 Na 对普通豆幼苗种子萌发和生长的不利影响的能力。从 NaCl 中制备了 5 种浓度的 Na，即 1000、2000、3000、4000 和 5000mgL，并用蒸馏水作为对照。种子和幼苗用 3 种不同的 NS 浓度（100、200 和 300mgL）处理。结果表明，Na 浓度对所有测量参数都有不利影响。然而，用 NS 处理种子和幼苗可以改善它们的生长，并使所有测量值更高。例如，用 300mgL NS 处理用 5000mgNaL 灌溉的种子，最终发芽率、活力指数和发芽速度分别提高了 19.7%、80.7%和 22.6%。虽然普通豆幼苗不能在最高水平的 Na 下生长，但用 NS 强化幼苗有助于它们在 5000mgL 的 Na 下良好生长。用 300mgL NS 处理幼苗后，在灌溉 5000mgNaL 溶液时，茎长和根长分别增加了 11.1%和 23.1%，在同一处理下，茎和根的干重分别增加了 110.9%和 328.0%。这些结果证明了使用 NS 缓解由 Na 引起的盐度的不利影响的重要性。在用 300mgL 的 NS 处理幼苗后，在植物组织中测量到的低 Na 含量也证实了这一发现。
