PT  - JOURNAL ARTICLE
AU  - XUE, Z.C.
AU  - WANG, Y.
AU  - LIU, J.
TI  - Systematic salt tolerance-related physiological mechanisms of wild soybean and their role in the photosynthetic activity and Na&lt;sup&gt;+&lt;/sup&gt; distribution of grafted soybean plants
DP  - 2022 Sep 8
TA  - Photosynthetica
PG  - 400--407
VI  - 60
IP  - 3
AID - 10.32615/ps.2022.030
IS  - 03003604
AB  - Systematic salt tolerance-related physiological mechanisms in roots and shoots of halophyte Dongying wild soybean have not yet been thoroughly studied. In this study, photosynthesis, modulated 820-nm reflection, chlorophyll a fluorescence, and Na&lt;sup&gt;+&lt;/sup&gt; distribution in cultivated (G&lt;sub&gt;mc&lt;/sub&gt;) and wild (G&lt;sub&gt;sw&lt;/sub&gt;) soybean leaves of grafted soybean plants were investigated after NaCl treatment. Results showed that the decreases in photosynthetic rate, performance index, active P&lt;sub&gt;700&lt;/sub&gt; content, and plastocyanin reduction were significantly greater in the G&lt;sub&gt;sw&lt;/sub&gt; leaves than those in the G&lt;sub&gt;mc&lt;/sub&gt; leaves.  The observed increases in the Na&lt;sup&gt;+ &lt;/sup&gt;concentration in the G&lt;sub&gt;sw&lt;/sub&gt; leaves were likely responsible for the severe decrease in the photosynthetic activity of grafted plants. We suggest that Na&lt;sup&gt;+&lt;/sup&gt; accumulation in G&lt;sub&gt;sw&lt;/sub&gt; roots, which prevents the transport of Na&lt;sup&gt;+&lt;/sup&gt; from the roots to the shoots, effectively maintains the concentration of Na&lt;sup&gt;+ &lt;/sup&gt;at a comparatively low level in the leaves to prevent the destruction of the photosynthetic apparatus by salt.