Exogenous salicylic acid and hydrogen peroxide attenuate drought stress in rice

By A. Sohag, M. Tahjib‐Ul‐Arif, Marian Brestic, S. Afrin, M. Sakil, M. Hossain, M. Hossain, Md. Afzal Hossain. 2020

170 citations recorded by the source corpus.

Hydrogen peroxide (H2O2) and salicylic acid (SA) exhibit protective effects against a wide array of stresses. In this study, we investigated the relative efficacy of exogenous H2O2 and SA in conferring drought tolerance in rice (Oryza sativa L.). The experiment was repeated two times, firstly in a hydroponic system and secondly in soil. The results revealed that drought hampered germination indices, seedling growth, photosynthetic pigments, and water content, whereas increased proline content. It also triggered higher H2O2 production and consequently elevated lipid peroxidation, which is a particular indication of oxidative damage. However, exogenous H2O2 or SA treatment effectively alleviated oxidative damage in rice seedlings both in hydroponic and soil systems via upregulating antioxidant enzymes. Nevertheless, regulation of proline level and augmentation of plant-water status were crucial to confer drought tolerance. Exogenous H2O2 or SA also protected photosynthetic pigments from oxidative damage that might help to maintain normal photosynthesis under drought. Besides, 5 mmol/L H2O2 and 0.5 or 1 mmol/L SA showed similar effectiveness on mitigating drought stress. Finally, our findings suggest that exogenous H2O2 or SA could evenly be effectual in the amending growth of rice seedlings under drought conditions.

Subfields: Plant Science

View Paper: https://www.semanticscholar.org/paper/d06ed4d955dd8a16ee1e07bc127ef7d1dcb6a9bd

How researchers see this paper

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In Plant Science

1. M. Hasanuzzaman
2. M. Fujita
3. J. Mahmud
4. M. Bhuyan
5. A. Raza
6. Faisal Zulfiqar
7. Kamrun Nahar
8. Mahabub Alam

Citations in the corpus

• Reactive Oxygen Species and Antioxidant Defense in Plants under Abiotic Stress: Revisiting the Crucial Role of a Universal Defense Regulator (2020, background): “In addition, H2O2 is a critical component of stress response regulation in crop plants such as rice [13], wheat [14], maize [15], mung bean [16], soybean [17], cucumber [18], sour orange [19], strawberry [20], basil [21], and rapeseed [22].”