Jocienė Lina, Krokaitė Edvina, Rekašius Tomas, Vilčinskas Ramūnas, Judžentienė Asta, Marozas Vitas, Kupčinskienė Eugenija
Department of Biology, Faculty of Natural Sciences, Vytautas Magnus University, K. Donelaičio Str. 58, 44248 Kaunas, Lithuania.
Department of Mathematics and Statistics, Faculty of Informatics, Vytautas Magnus University, K. Donelaičio Str. 58, 44248 Kaunas, Lithuania.
Plants (Basel). 2023 Feb 20;12(4):961. doi: 10.3390/plants12040961.
For the study of the ionomic parameters of needles, fourteen sites covering most of the territory of Lithuania and belonging to distinct habitats (coastal brown dunes covered with natural Scots pine forests (G), scrubs (F), transition mires and quaking bogs (D), subcontinental moss Scots pine forests (G), and xero-thermophile fringes) were selected. Concentrations of macro-, micro-, and non-essential elements were analyzed in current-year needles, sampled in September. According to the concentrations of elements in needles, the differences between the most contrasting populations were as follows: up to 2-fold for Mg, N, K, Ca, and Zn; 2- to 7-fold for P, Na, Fe, Cu, Al, Cr, Ni, and Pb; and 26- to 31-fold for Mn and Cd. The concentrations of Cd, Cr, and Ni in needles of did not reach levels harmful for conifers. When compared to all other habitats (B, F, G, and E), the populations from transition mires and quaking bogs (D) had significantly lower concentrations of main nutritional elements N (12176 µg/g d. m.), P (1054 µg/g d. m.), and K (2916 µg/g d. m.). In scrubs (F), a habitat protected by EUNIS, the concentration of K in the needles was highest, while Zn and Cu concentrations were the lowest. Principal component (PC) analyses using concentrations of 15 elements as variables for the discrimination of populations or habitats allowed authors to distinguish F and B habitats from the E habitat (PC1) and F and D habitats from the G habitat (PC2). Discriminating between populations, the most important variables were concentrations of P, N, Mg, Ca, Cu, and K. Discriminating between habitats, the important variables were concentrations of N and P.
为了研究针叶的离子组学参数，选取了覆盖立陶宛大部分地区且属于不同栖息地的14个地点（沿海覆盖着天然苏格兰松林的棕色沙丘（G）、灌丛（F）、过渡沼泽和颤沼（D）、亚大陆苔藓苏格兰松林（G）以及旱生嗜热边缘地带）。对9月采集的当年生针叶中的大量元素、微量元素和非必需元素浓度进行了分析。根据针叶中的元素浓度，差异最大的种群之间的差异如下：镁、氮、钾、钙和锌高达2倍；磷、钠、铁、铜、铝、铬、镍和铅为2至7倍；锰和镉为26至31倍。针叶中的镉、铬和镍浓度未达到对针叶树有害的水平。与所有其他栖息地（B、F、G和E）相比，来自过渡沼泽和颤沼（D）的种群中主要营养元素氮（12176 µg/g干重）、磷（1054 µg/g干重）和钾（2916 µg/g干重）的浓度显著较低。在受EUNIS保护的灌丛栖息地（F）中，针叶中的钾浓度最高，而锌和铜浓度最低。以15种元素的浓度作为变量进行主成分（PC）分析以区分种群或栖息地，作者能够将F和B栖息地与E栖息地区分开来（主成分1），并将F和D栖息地与G栖息地区分开来（主成分2）。区分种群时，最重要的变量是磷、氮、镁、钙、铜和钾的浓度。区分栖息地时，重要变量是氮和磷的浓度。
