The Response of Leaf Tissues of the <scp> C ₄ </scp> Euhalophyte <scp> <i>Suaeda altissima</i> </scp> (L.) Pall. To Salinity Stress

pathway. In contrast, the growth-inhibitory NaCl concentration reduced Rubisco content, decreasing it below the level observed in the absence of NaCl. An increase in cell size was observed in the chlorophyllous tissues in response to both the growth-stimulating and growth-inhibitory salinity, leading to an increase in leaf succulence. The greatest increase in size was observed in WSCs. Chloroplasts from different tissues differed in their ability to maintain native structure and robustness of Rubisco-chloroplast binding under salinity, suggesting chloroplast heterogeneity and different Rubisco sensitivities to NaCl.