Comparative Physiological and Biochemical Changes in Tomato ( L.) Under Salt Stress and Recovery: Role of Antioxidant Defense and Glyoxalase Systems.

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ID: 40046
2019
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Ranked #33 of 62 articles by views in Antioxidants (Basel, Switzerland)

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Abstract
Salinity toxicity and the post-stress restorative process were examined to identify the salt tolerance mechanism in tomato, with a focus on the antioxidant defense and glyoxalase systems. Hydroponically grown 15 day-old tomato plants ( L. cv. Pusa Ruby) were treated with 150 and 250 mM NaCl for 4 days and subsequently grown in nutrient solution for a further 2 days to observe the post-stress responses. Under saline conditions, plants showed osmotic stress responses that included low leaf relative water content and high proline content. Salinity induced oxidative stress by the over-accumulation of reactive oxygen species (HO and O) and methylglyoxal. Salinity also impaired the non-enzymatic and enzymatic components of the antioxidant defense system. On the other hand, excessive Na uptake induced ionic stress which resulted in a lower content of other minerals (K, Ca, and Mg), and a reduction in photosynthetic pigment synthesis and plant growth. After 2 days in the normal nutrient solution, the plants showed improvements in antioxidant and glyoxalase system activities, followed by improvements in plant growth, water balance, and chlorophyll synthesis. The antioxidant and glyoxalase systems worked in concert to scavenge toxic reactive oxygen species (ROS), thereby reducing lipid peroxidation and membrane damage. Taken together, these findings indicate that tomato plants can tolerate salinity and show rapid post-stress recovery by enhancement of their antioxidant defense and glyoxalase systems.
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parvin2019comparativeantioxidants Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Parvin, Khursheda;Hasanuzzaman, Mirza;Bhuyan, M H M Borhannuddin;Nahar, Kamrun;Mohsin, Sayed Mohammad;Fujita, Masayuki;
Journal Antioxidants (Basel, Switzerland)
Year 2019
DOI
E350
URL
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