Osmoregulatory and Antioxidants Modulation by Salicylic Acid and Methionine in Cowpea Plants under the Water Restriction

Oliveira, Auta Paulina da Silva; Melo, Yuri Lima; Alencar, Rayanne Silva de; Viégas, Pedro Roberto Almeida; Dias, Guilherme Felix; Ferraz, Rener Luciano de Souza; Sá, Francisco Vaniés da Silva; Neto, José Dantas; Magalhães, Ivomberg Dourado; Gheyi, Hans Raj; Lacerda, Claudivan Feitosa de; Melo, Alberto Soares de

doi:10.3390/plants12061341

Cited by 4 publications

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“…Additionally, under water restriction, the application of SA increased the activity of antioxidant enzymes such as APX and CAT, potentially helping to alleviate the negative impacts of water stress in the studied cultivars ( Shemi et al., 2021 ; Sultana et al., 2024 ). Similar findings were reported by Oliveira et al. (2023) in the cowpea cultivar BRS Pajeú, where SA application at a concentration of 0.21 g L −1 led to an increase in APX activity.…”

Section: Discussionsupporting

confidence: 88%

Salicylic acid improves cowpea productivity under water restriction in the field by modulating metabolism

Cavalcante,

de Melo,

Ferraz

et al. 2024

Front. Plant Sci.

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IntroductionSalicylic acid has shown promise in alleviating water stress in cultivated plants. However, there is a lack of studies confirming its effectiveness in cowpea plants grown in field conditions. Therefore, this research aimed to evaluate the use of salicylic acid as a water stress mitigator in cowpea cultivars under different irrigation depths in field conditions.MethodsFour cowpea cultivars (BRS Novaera, BRS Tapaihum, BRS Pujante, and BRS Pajeú) were subjected to different treatments: control (W100: 100% replacement of crop evapotranspiration – ETc), W50 (50% of ETc), W50+SA2 (50% of ETc + 276 mg L-1 of SA), and W50+SA4 (50% of ETc + 552 mg L-1 of SA). The treatments were combined in a 4×4 factorial scheme with three replications, arranged in a randomized block design.ResultsWater restriction had a negative impact on the water status, growth, gas exchange, and production of the cultivars while also leading to changes in the antioxidant metabolism and osmolyte concentration. The application of SA enhanced antioxidant activity and the synthesis of osmotic adjusters under stress conditions. The most effective concentration was 276 mg L-1 in stage R2 and 552 mg L-1 in stage V7, respectively. The BRS Pujante cultivar showed increased productivity under water restriction with SA application, while the BRS Tapaihum was the most tolerant among the cultivars studied.DiscussionIn summary, our findings underscore the importance of using SA to mitigate the effects of water restriction on cowpea cultivation. These discoveries are crucial for the sustainability of cowpea production in regions susceptible to drought, which can contribute to food security. We further add that the adoption of new agricultural practices can enhance the resilience and productivity of cowpea as an essential and sustainable food source for vulnerable populations in various parts of the world.

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Section: Discussionsupporting

confidence: 88%