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The H2PO4 − and SO4 2− contents. The effects of salt stress (S) and alkali stress (A) on H2PO4 − and SO4 2− content in rhizomes, stems, roots, and leaves of L. chinensis. There are three levels under both stresses: 0, 100, and 200 mmol/L. The means and standard errors are reported. Within each column, the different letters indicate significant difference among treatments (P < 0.05).
