Understanding physiological and molecular adaptations of three diverse halophytic grasses under saline and sodic stresses


  • Charu Lata
  • Ashwani Kumar
  • Naresh Kumar
  • Gurpreet Kaur
  • Sulekha Rani
  • Anita Mann


Physiological and biochemical analyses of three halophytes were conducted to explore their tolerance and phytoremediation potential. The halophytes and Urochondra setulos , Sporobolus marginatus Leptochloa a fusca were categorised based on gas exchange attributes, antioxidant system, biomass production under soil salinity (E e 30-50 dS/m) and sodicity (pH 9.5-10). and produced slightly higher C L. fusca S. arginatus mbiomass under the sodic condition of pH 9.5, while in , it increased under salinity stress. Under sodic U. etulosa s conditions, showed less reduction in potassium content and maintained a higher K /Na ratio in their L. fusca + +leaf tissues. A maximum decrease in net photosynthesis was observed in (28.55%) at ECe ~ 50 dS mL. fusca -1 while minimum in (13.73%) at pH ~ 10.0. Comparatively, showed higher stomatal S. marginatus U. setulosa conductance and transpiration rate than and . At the highest pH and salinity, the L. fusca S. marginatus antioxidant activities of enzymes APX, SOD, GR and POX increased in all three halophytes. Quantitative expression of , and genes in all three halophytes increased with salt stresses. Based MnSOD NHX1 FuSOS1 on these indicators, these halophytes were categorised as salt-tolerant or alkaline-stress-tolerant.