Ramírez-Olvera Sara Monzerrat, Trejo-Téllez Libia Iris, Gómez-Merino Fernando Carlos, Ruíz-Posadas Lucero Del Mar, Alcántar-González Ernesto Gabriel, Saucedo-Veloz Crescenciano
Department of Plant Physiology, College of Postgraduates in Agricultural Sciences Campus Montecillo, Montecillo 56230, Mexico.
Department of Soil Science, College of Postgraduates in Agricultural Sciences Campus Montecillo, Montecillo 56230, Mexico.
Plants (Basel). 2021 Apr 15;10(4):777. doi: 10.3390/plants10040777.
Exogenous silicon (Si) can enhance plant resistance to various abiotic factors causing osmotic stress. The objective of this research was to evaluate the application of 1 and 2 mM Si to plants under normal conditions and under osmotic stress. Morelos A-98 rice seedlings, were treated with 1 and 2 mM SiO for 28 d. Subsequently, half of the plants were subjected to osmotic stress with the addition of 10% polyethylene glycol (PEG) 8000; and continued with the addition of Si (0, 1 and 2 mM SiO) for both conditions. The application of Si under both conditions increased chlorophyll in leaves, root volume, as well as fresh and dry biomass of roots. Interestingly, the number of tillers, shoot fresh and dry biomass, shoot water content, concentration of total chlorophyll, chlorophyll / ratio, and the concentration of total sugars and proline in shoot increased with the addition of Si under osmotic stress conditions. The addition of Si under normal conditions decreased the concentration of sugars in the roots, K and Mn in roots, and increased the concentration of Fe and Zn in shoots. Therefore, Si can be used as a potent inorganic biostimulant in rice Morelos A-98 since it stimulates plant growth and modulates the concentration of vital biomolecules and essential nutrients.
外源硅（Si）可以增强植物对各种导致渗透胁迫的非生物因子的抗性。本研究的目的是评估在正常条件和渗透胁迫下，向植物施用1 mM和2 mM硅的效果。用1 mM和2 mM SiO处理莫雷洛斯A - 98水稻幼苗28天。随后，一半的植株通过添加10%聚乙二醇（PEG）8000施加渗透胁迫；两种条件下均继续添加硅（0、1 mM和2 mM SiO）。在两种条件下施用硅均增加了叶片中的叶绿素含量、根体积以及根的鲜重和干重。有趣的是，在渗透胁迫条件下添加硅后，分蘖数、地上部鲜重和干重、地上部含水量、总叶绿素浓度、叶绿素/ 比值以及地上部总糖和脯氨酸浓度均增加。在正常条件下添加硅降低了根中糖的浓度、根中钾和锰的浓度，并增加了地上部铁和锌的浓度。因此，硅可作为莫雷洛斯A - 98水稻中一种有效的无机生物刺激剂，因为它能刺激植物生长并调节重要生物分子和必需养分的浓度。
