ShOʻRLANIShNING RUBIA TINCTORUM L. OʻSIMLIGINING FIZIOLOGIK VA BIOKIMYOVIY KOʻRSATKIChLARIGA TAʼSIRI

The effects of 0, 50, 100 and 150 mM NaCl on growth, photosynthetic performance, osmotic and ionic homeostasis, antioxidant defense, and root accumulation of alizarin and purpurin in Rubia tinctorum L. were evaluated. Increasing salinity reduced growth and chlorophyll content, whereas 100 mM NaCl produced the strongest proline accumulation, SOD, CAT and POD activities, and anthraquinone levels; at 150 mM NaCl, adaptive and secondary-metabolic responses declined.

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