Mavrič Čermelj Anja, Fideršek Eva, Golob Aleksandra, Kacjan Maršić Nina, Vogel Mikuš Katarina, Germ Mateja
Biotechnical Faculty, University of Ljubljana, Jamnikarjeva ulica 101, 1000 Ljubljana, Slovenia.
Department of Low and Medium Energy Physics, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia.
Plants (Basel). 2022 May 25;11(11):1405. doi: 10.3390/plants11111405.
This study was undertaken to determine the effect of potassium silicate (KSiO) on the physiological and growth characteristics and elemental composition of barley plants. Hydroponically grown barley ( L.) var. Wilma was exposed to four different levels of Si in the form of KSiO at concentrations of 0 (Si), 0.5 (Si), 1 (Si) or 1.5 (Si) mM Si. Plants were analyzed for root length, number of dry leaves, number of trichomes, electron transport system activity in mitochondria (ETS), leaf pigment content and elemental composition of roots and leaves. Treatment with Si significantly increased the concentration of total chlorophylls, root length and ETS activity in barley. Plants with no Si added to the nutrient solution had significantly more dry leaves than plants from all Si-treated groups. Necrosis was observed in Si plants, while leaf damage was not visible in treated plants. According to the results of the study, we evidenced that plants were stressed due to Si deficiency. The addition of KSiO significantly affected the concentration of Si, K, Ca, Cl, S, Mn, Fe and Zn in roots and leaves of barley. In barley treated with Si, plants showed the best performance in terms of their physiological characteristics and growth.
本研究旨在确定硅酸钾（KSiO）对大麦植株生理、生长特性及元素组成的影响。水培大麦（L.）品种威尔玛分别暴露于浓度为0（Si0）、0.5（Si0.5）、1（Si1）或1.5（Si1.5）mM硅的四种不同水平的以KSiO形式存在的硅环境中。对植株的根长、干叶数量、毛状体数量、线粒体电子传递系统活性（ETS）、叶片色素含量以及根和叶的元素组成进行了分析。硅处理显著提高了大麦中总叶绿素浓度、根长和ETS活性。营养液中未添加硅的植株比所有硅处理组的植株干叶数量显著更多。在无硅植株中观察到坏死现象，而在处理过的植株中未见到叶片损伤。根据研究结果，我们证明植株因缺硅而受到胁迫。添加KSiO显著影响了大麦根和叶中硅、钾、钙、氯、硫、锰、铁和锌的浓度。在经硅处理的大麦中，植株在生理特性和生长方面表现最佳。
