RT Journal Article
SR Electronic
A1 XUE, Z.C.
A1 WANG, Y.
A1 LIU, J.
T1 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
JF Photosynthetica
YR 2022
VO 60
IS 3
SP 400
OP 407
DO 10.32615/ps.2022.030
UL https://ps.ueb.cas.cz/artkey/phs-202203-0009.php
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.