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Effect of Rhizospheric Bacteria on the Productivity of Wheat Plantsand Inflow of Elements from Contaminated Soilsстатья
Дата последнего поиска статьи во внешних источниках: 17 апреля 2024 г.
- Авторы: Plekhanova I.O., Kulikov V.O., Shabaev V.P.
- Журнал: Moscow University Soil Science Bulletin
- Том: 78
- Номер: 3
- Год издания: 2023
- Издательство: Allerton Press Inc.
- Местоположение издательства: United States
- Первая страница: 257
- Последняя страница: 262
- DOI: 10.3103/S0147687423030110
- Аннотация: Abstract—This paper presents the results of a greenhouse experiment conducted on the humus horizon of a sod–podzolic sandy loam soil (Albic Retisol) contaminated with heavy metals due to the past application of sewage sludge as a fertilizer. The soil was used to cultivate vegetables and forage grasses; however, over the past 10 years, it lay fallow. The experiment was conducted to examine the effect exercised by rhizospheric bacteria of the genus Pseudomonas on biomass of spring wheat plants and the inflow of micro- and macroelements into their vegetative organs and root systems. As a result of bacterial inoculation, the biomass of wheat plants increased by 10–12%, while the content of the main macro- and microelements in the plants changed. The content of Ca, K, Mg, Na, and P in the vegetative part of wheat plants inoculated with P. fluorescens 21 and P. putida 23 decreased by 1.5–2 times. The content of macroelements in wheat roots changed insignificantly, but the ratio between their concentrations in roots and vegetative parts of plants increased. The distributionof the content of microelements and heavy metals (HMs) became much more contrasting: in the variantwithout bacterial inoculation, the concentration of Cd in roots of wheat plants exceeded that in their vegetative parts by nine times; in variants involving inoculation with P. fluorescens 21 and P. putida 23, the concentration of Cd in roots exceeded that in vegetative parts by 18 and 11 times, respectively; and in variants with P. fluorescens 20, by seven times. The content of Cd in the vegetative part of wheat plants decreased by half in variants involving inoculation with P. fluorescens 21 and by 1.5 times in variants with P. putida 23. The content of Zn in aboveground parts of plants also decreased: by 1.8 times in variants with P. fluorescens 21 and by 1.4 times in variants with P. putida 23. The higher ratios between the content of elements in roots and greenmatter indicate an increase in the resistance of plants to the toxic effect of heavy metals and in the barrier function of their roots.Keywords: bacteria of the genus Pseudomonas, macroelements, heavy metals, content of elements in plants, barrier function of roots
- Добавил в систему: Плеханова Ирина Овакимовна