The results suggest that TU treatment maintains the integrity and functioning of mitochondria in seeds as well as seedlings exposed to salinity. Thus, TU has the potential to be used as an effective bioregulator to impart salinity tolerance under field conditions, and might prove to be of high economic importance by opening new avenues for both basic and applied research.

The TU treatment co-ordinately regulates different signalling and effector mechanisms at an early stage to alleviate stress even under a high degree of salinity. This also indicates the potential of TU to be used as an effective bioregulator to impart salinity tolerance under field conditions.

Salt stress, Thylakoid membrane, Pigment-protein complex, PS II, Thermoluminescence, Mung bean ( Vigna radiata L.), Indian mustard (Brassica juncea Coss.)In the present study, mung bean (Vigna radiata L.) -a salt susceptible and Indian mustard (.Brassica juncea L.) -a salt resistant crop was studied to find out the differences in stress responses of these crops. Seedlings were grown in water soaked cotton under continuous illumination of 35 (.imole m 2 s 1 at 26 ± 1 °C. Salinity treatment of 0, 0.5 and 1.0% (w/v) was given to the seedlings at 6 day Photosynthetic pigment content and PS II electron trans port activity was reduced under salinity in both mung bean and Indian mustard. The pigment protein pattern of both the crops were similar. Ratio analysis of B and Q thermolumines cence (T L ) glow peaks suggested that S2Q a-charge recombination was relatively more af fected than S2/?Qb-charge recombinations.

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