Antioxidative Responses of Cowpea Cultivars to Water Deficit and Salicylic Acid Treatment

Dutra, Wellison Filgueiras; Melo, Alberto Soares de; Suassuna, Janivan Fernandes; Dutra, Alexson Filgueiras; Silva, Duval Chagas da; Maia, Josemir Moura

doi:10.2134/agronj2015.0519

Cited by 22 publications

(30 citation statements)

References 23 publications

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“…Water potential in plants has been accepted as an excellent indicator of water stress. In the present study, water restriction affected the water potential of cowpea plants, which may cause interference in the normal functions of cowpea plants by physiological and morphological changes, mainly due to the imbalance of the oxidoreduction system, which causes losses in the developing organs during growth as observed by Dutra et al (2017). Tc -textural class; Bd (g cm -3 ) -bulk density; Pd -particle density; Pt -porosity (%); ECe (nmhos cm 1 ) -electrical conductivity; OM (%) -organic matter.…”

Section: Resultsmentioning

confidence: 71%

“…For the activity of the antioxidant enzymes under water deficit conditions (W50), there were increases of 106% in APX activity in the cultivar BRS Guariba, 42% in SOD activity in the cultivar BRS Itaim, 40 and 63% in SOD and APX activities in the cultivar BRS Aracê, besides 29 and 112% in the SOD and APX activities in the cultivar BRS Rouxinol, respectively, compared to their treatments controls (W100) ( Figure 2B and C). Water deficit causes imbalance between the production of ROS and their removal by antioxidant activity, which increases the effects of oxidative stress on the plant (Dutra et al, 2017). The increase in ROS levels compromises membrane permeability because it causes proteolysis and intensifies lipid peroxidation (Zhang et al, 2017a).…”

Section: Resultsmentioning

confidence: 99%

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Silicon foliar application attenuates the effects of water suppression on cowpea cultivars

Silva

Melo

et al. 2019

Ciênc. agrotec.

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Silicon and proline play important physiological, metabolic and functional roles in plants, especially under water deficit conditions. Their application can mitigate the adverse effects of stress in crops by increasing water use efficiency and antioxidant activity. The objective of this study was to evaluate silicon (Si) as attenuator of the effects of water deficit on cowpea cultivars, through physiological, biochemical and growth indicators. The experimental design was randomized blocks with four cultivars (BRS Guariba, BRS Itaim, BRS Aracê and BRS Rouxinol) and four irrigation treatments associated or not with Si application (W100 - 100% ETo; W50 - 50% ETo; W50+100Si and W50+200Si, with 100 and 200 mg L-1 silicon, respectively), in a 4 x 4 factorial scheme, with five replicates. Leaf water potential, proline concentration, antioxidant enzymes and growth indicators were evaluated in cowpea plants. Under water deficit conditions, all cultivars showed reductions in leaf water potentials, which compromised plant growth. However, Si applications of 200 mg L-1 in the cultivar BRS Guariba and 100 and 200 mg L-1 in the cultivar BRS Itaim minimized the effects of stress, by increasing leaf water potential and the activity of the enzyme ascorbate peroxidase, in both cultivars, besides increasing proline concentration in the former and reducing proline concentration in the latter, which ensured the maintenance of growth. Despite the no contribution to the increase in water potential, Si applications of 100 and 200 mg L-1 in BRS Rouxinol and BRS Aracê, respectively, reduced the deleterious effects of the stress on their growth by regulating the enzymatic metabolism and proline.

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Section: Resultsmentioning

confidence: 71%

Section: Resultsmentioning

confidence: 99%

Silicon foliar application attenuates the effects of water suppression on cowpea cultivars

Silva

Melo

et al. 2019

Ciênc. agrotec.

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“…Cowpea [Vigna unguiculata (L.) Walp] is a prominent legume for drylands because it tolerates high temperatures and low water availability conditions (Dutra et al 2017). Cowpea ability to associate with a wide range of nitrogen-fixing bacteria is another feature of great importance for this crop, since the majority of smallholders, the main part of cowpea growers in Brazil, do not use rhizobial inoculants or N fertilization.…”

Section: Introductionmentioning

confidence: 99%

Molecular, Physiological, and Symbiotic Characterization of Cowpea Rhizobia from Soils Under Different Agricultural Systems in the Semiarid Region of Brazil

Sena

Nascimento

Lino

et al. 2020

J Soil Sci Plant Nutr

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The objectives of this study were to characterize the genetic diversity and evaluate the ability to tolerate stress as well as to assess the symbiotic efficiency of bacteria from cowpea nodules in agricultural soils with different uses in the semiarid region of Bahia state (Brazil). Soil samples were collected from six crop lands and one from the pristine Caatinga biome. After a trap-host experiment, the bacteria were isolated and culturally characterized. Isolates with typical characteristics of Bradyrhizobium were subjected to the nodC symbiotic gene amplification and those positive were evaluated by 16S-23S IGS-RFLP. Twenty-seven isolates belonging to different genetic clusters were selected for 16S-23S IGS sequencing. In additions, the selected bacteria were characterized biochemically and symbiotically. Among 420 characterized isolates, approximately 60% (251 isolates) displayed typical Bradyrhizobium cultural features. A total of 161, out of 251 isolates, showed positive amplification of the nodC gene fragment. The IGS-RFLP profiles analysis generated 33 groups and 27 were selected for further analysis. The fertility of the soils influenced the distribution of the isolates in the IGS-RFLP clusters. The bacteria were assigned to two genera, Bradyrhizobium and Microvirga, with 26 and 1 representative bacteria, respectively. Some isolates were able to tolerate NaCl as well as acidic and alkaline pH. In addition, isolates showed the abilities to produce biofilm under stress and to produce indole compounds, as well as efficient nodulation and nitrogen fixation. The isolates displayed great genetic, biochemical, and symbiotic variability with promising biotechnological potential.

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“…Salicylic acid has been studied extensively to evaluate its capability to provide protection to plants, when they are subjected to water stress. These studies have been conducted in different agricultural crops, including common beans, by Agostini, Machado-Neto and Custódio (2013); in sesame, by Silva et al (2017); and in cowpea, by Dutra et al (2017) and Costa (2016).…”

Section: Introductionmentioning

confidence: 99%

Germination and Initial Growth of Cowpea Cultivars Under Osmotic Stress and Salicylic Acid

et al. 2018

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Cowpea is one of the major food crops in Northeast Brazil, where it is commonly cultivated in the semi-arid regions with limited water availability. It is important to study the elicitors associated with cowpea to mitigate any deleterious effects of abiotic stress on the initial establishment of this crop. In this study, we aimed to evaluate the morphophysiological changes in cowpea cultivars under osmotic stress with seeds soaked in salicylic acid. The germination test was conducted in B.O.D germination chambers. The seeds of three cowpea cultivars: BRS Tumucumaque, BRS Aracê, and BRS Guariba, were germinated at five osmotic potentials (0.0; -0.2; -0.4; -0.6, and -0.8 MPa) after three pre-treatments: pre-soaking in deionized water, pre-soaking in salicylic acid, and without pre-soaking. The following parameters were evaluated: germination, germination speed index, seedling height, total phytomass, contents of chlorophyll ‘a’ and ‘b’, carotenoid content, electrolyte leakage, water content, and proline content. Our results indicate that salicylic acid promotes reduction in the harmful effects of abiotic stress, which is reflected in the increase in germination percentage, seedling height, and chlorophyll and carotenoid content as well as in the adjustment of electrolyte leakage and increase in proline content under induced water stress conditions. The cultivar BRS Guariba proved to be more tolerant to water deficit during germination and initial growth stages, when the seeds were treated with salicylic acid (1 mM).

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Antioxidative Responses of Cowpea Cultivars to Water Deficit and Salicylic Acid Treatment

Cited by 22 publications

References 23 publications

Silicon foliar application attenuates the effects of water suppression on cowpea cultivars

Silicon foliar application attenuates the effects of water suppression on cowpea cultivars

Molecular, Physiological, and Symbiotic Characterization of Cowpea Rhizobia from Soils Under Different Agricultural Systems in the Semiarid Region of Brazil

Germination and Initial Growth of Cowpea Cultivars Under Osmotic Stress and Salicylic Acid

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