Abstract
The quantitative content and distribution in organs and tissue compartments of Na + ions in halophytes Suaeda prostrata Pall., Salicornia perennans Willd., Artemisia santonica L. growing in the areas with chloride-sulfate type of salinization of soil in the vicinity of the Sasyk salt lake (Northwest Crimea) has been determined. It was found that for S. perennans and S. prostrata euhalophytes the strategy of translocation of Na + ions to the organs of the aerial part with increasing NaCl concentration in the medium was typical. In this case, the content of Na + ions in the cell sap of the above-ground parts of plants significantly increases which is more pronounced in S. perennans . Increasing concentrations of NaCl in the medium contribute to 0.50–0.75% improvement in plant growth indicators and protein content increase in vegetative organs. A positive correlation between the content of Na + and biomass accumulation in organs of euhalophytes is shown. Glycohalophyte A. santonica is characterized by localization of Na + ions predominantly in the root tissues. The highest content of Na + ions in the above-ground organs of euhalophytes growing in natural conditions was observed in the phase of active vegetative growth and budding, therefore, it is recommended to mow their aerial organs at these stages of ontogenesis for the purpose of soil desalinization. It is concluded that absorption of Na + , as a strategy of adaptation of halophytes to salinity, not only helps to reduce water potential in cells and plants in general, but also activates anabolism, which directly correlates with their salt tolerance.
Highlights
Определяли содержание и распределение в органах и компартментах тканей ионов Na+ у галофитов Suaeda prostrata Pall., Salicornia perennans Willd., Artemisia santonica L., произрастающих на участках с хлоридно-сульфатным типом засоления почвы в окрестностях соленого озера Сасык (Северо-Западный Крым)
The quantitative content and distribution in organs and tissue compartments of Na+ ions in halophytes Suaeda prostrata Pall., Salicornia perennans Willd., Artemisia santonica L. growing in the areas with chloride-sulfate type of salinization of soil in the vicinity of the Sasyk salt lake (Northwest Crimea) has been determined
It was found that for S. perennans and S. prostrata euhalophytes the strategy of translocation of Na+ ions to the organs of the aerial part with increasing NaCl concentration in the medium was typical
Summary
Растения выращивали в условиях лаборатории в водной и почвенной культуре, а для отдельных экспериментов использовали растительный материал, взятый на засоленных почвах (в природных условиях). Для опытов в почвенной культуре семена галофитов, собранные в естественной среде, проращивали во влажном песке и на 15-е сутки проростки по 15 штук высаживали в вегетационные сосуды емкостью 2 л, заполненные смесью лугово-черноземной почвы и промытого кварцевого песка 3 : 1. С которой были взяты растения, показал, что содержание в ней Na+ составляет 1,07%, Сl– – 0,58%, SO42– – 0,14%, то есть почва является засоленной (хлоридно-сульфатное засоление). Определение содержания ионов Na+ в органах и компартментах тканей растений. Определение содержания ионов Na+ проводили методом атомно-абсорбционныой спектрофотометрии («Сarl Zeiss», Германия). В исследуемом растворе определяли содержание ионов Na+. Содержание белка в растениях определяли колориметрическим методом по Lowry (Lowry et al, 1951; Stepanchenko et al, 2011).
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