MDA and free proline play a key role as osmolytes in the control of water retention in plants under water stress, were chosen as variables to confirm the benefits of S. luteus ? 30days T. viren inoculation. After 5 days of water shortage, the level of MDA began to rise. The non-inoculated seedlings reached a maximum value of 0.19 nmol/mg
protein by the end of day 10. The water-stressed seedlings treated with S. luteus ? 30 days T. virens reached a maximum value of 0.07 nmol/mg protein over the same period. Contrary to this result, the control seedlings (S. ? 30 days T. and CK) remained almost stable during the entire experiment (Fig. 3). After 5 days of water shortage, the content of free proline in water-stressed seedlings began to rise. The non-inoculated seedlings reached a maximum of 58.18 lgg -1 by the end of day 20. Water-stressed seedlings inoculated with S. luteus ? 30 days T. viren reached a maximum of 33.06 lgg -1 over the same period. Similar to the MDA result, values for the treatments control S. ? 30days T. and control CK remained almost stable in the control seedlings in the whole experimental period (Fig. 4). Under water stress, the MDA content initially increased, then declined. However, the content of free proline increased.