Fig. 6.

Proposed mechanisms behind tolerance of M. ruthenica to drought stress. The dotted lines represent the transfer and translation. Arrows denote positive effects, whereas lines ending with a short bar indicate negative effects. Photosynthetic rates were measured using the newly expanded leaves treated for 7 days by a gas exchange system (LI-COR 6800). Root samples at the seventh day of drought were used to determine H₂O₂ and proline. Asat photosynthetic rate, ROS reactive oxygen species, Mtr M. truncatula, XH Xinghe accession, and ZLQ Zhenglanqi accession. Data are means±SE (n=4). Different letters mean significant differences among treatments at P<0.05