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- W2347212418 abstract "The authors used X-ray microanalysis to investigate ion compartmentation (Na~+, Cl~-and K~+) in leaf cells of a salt_tolerant species, Populus euphratica and a salt_sensitive species, P. tomentosa(treated by salt for 20 days). Regenerated plants were used in this experiment and following types of leaf cells were examined: 1) leaf vein cells—including xylem vessels in the bundle, parenchyma cells in the bundle and around the bundle; 2) mesophyll cells—including palisade and spongy mesophyll cells; 3) epidermal cells—including adaxial and abaxial epidermis. Results showed that there was genotypic difference in subcellular ion compartmentation under salt stress. Compared with P. tomentosa, P. euphratica exhibited a greater ability to exclude Na~+ to the apoplast, furthermore, P. euphratica had a higher capacity to compartmentize Na~+ into vacuoles. Control plants of P. euphratica retained higher levels of Cl~-in all cell compartments (chloroplast, cell wall and vacuole), as compared to the control of P. tomentosa plants. However, stressed P. euphratica remained lower levels of Cl~-than salinised P. tomentosa in all types of leaf cells, this was the result of root-to-shoot salt transport restriction in P. euphratica under saline conditions. With regard to K~+, salinity reduced K~+ level in chloroplast, vacuole and cell wall of all types of leaf cells in P. euphratica with a few exceptions. Unlikely, K~+ levels in the apoplast of P. tomentosa were lowered by salinity, but in vacuole, K~+ increased in response to salt stress. This was presumably resulted from the redistribution of K~+ in cell compartments: K~+ fluxed from the cell wall into the vacuole, which was favorable to balance the negative charges caused by vacuolar Cl~-compartmentation." @default.
- W2347212418 created "2016-06-24" @default.
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- W2347212418 date "2006-01-01" @default.
- W2347212418 modified "2023-09-25" @default.
- W2347212418 title "Ion compartmentation in leaf cells of Populus euphratica and P.tomentosa under salt stress" @default.
- W2347212418 hasPublicationYear "2006" @default.
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