WATER AND SALT STRESSES ON GERMINATION OF COWPEA ( Vigna unguiculata cv. BRS Tumucumaque) SEEDS

Ferreira, Aureane Cristina Teixeira; Felito, Ricardo Adriano; Rocha, Adriano Maltezo da; Carvalho, Marco Antônio Camillo de; Yamashita, Oscar Mitsuo

doi:10.1590/1983-21252017v30n422rc

Cited by 15 publications

(11 citation statements)

References 14 publications

(9 reference statements)

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“…Similar results have also been reported by other researchers, who found that an osmotic potential of -0.9 MPa after PEG, NaCl or mannitol treatment led to a reduction in maize and soybean seed germination (Abreu et al, 2014;Soares et al, 2015). A decline in cowpea (Vigna unguiculata) seed viability, vigor and quality was also reported by Ferreira et al (2017) when the osmotic potentials were below -0.6 MPa.…”

Section: Resultssupporting

confidence: 89%

Seed physiological quality and seedling growth of pea under water and salt stress

Pereira

Catão

Caixeta

2020

Rev. bras. eng. agríc. ambient.

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The aim of this study was to evaluate seed physiological quality and initial pea (Pisum sativum) seedling development at different water and salt potentials. Polyethylene glycol 6000, sodium chloride and potassium chloride solutions with different osmotic potentials (0; -0.2; -0.4; -0.6; -0.8; -1.0, and -1.2 MPa) were used, and the experiment had a 3 × 7 factorial arrangement. The physiological quality and initial seedling growth characteristics (first germination count, final germination count, strong normal seedlings, epicotyl and taproot lengths, epicotyl dry matter, and root dry matter) were evaluated in a completely randomized experimental design, with four repetitions. Decreases in the observed variables showed that the simulated stress conditions negatively affected physiological performance, germination and initial seedling growth. The water and salt stresses induced by the sodium chloride and potassium chloride solutions were greater than the stress induced by polyethylene glycol 6000.

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Section: Resultssupporting

confidence: 89%

Seed physiological quality and seedling growth of pea under water and salt stress

Pereira

Catão

Caixeta

2020

Rev. bras. eng. agríc. ambient.

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“…In the present work, the decrease of seed germination rate was indeed more evident that the decline in germination (%, six days after sowing) and one of the most pronounced parameters under study. This result is in accordance with other cowpea studies, where the seed germination rate (GR) also decreased with drought stress induced by PEG-6000 (Araújo et al, 2018;Ferreira et al, 2017;Murillo-Amador et al, 2002). Several cowpea genotypes revealed significant alterations in their germination with PEG-6000 treatments, while others were not so affected, suggesting that distinct genotypes could be differently disturbed by drought.…”

Section: Tablesupporting

confidence: 92%

Screening of worldwide cowpea collection to drought tolerant at a germination stage

Carvalho

Matos

Castro

et al. 2019

Scientia Horticulturae

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Global warming has an increasing impact on the availability of water for agriculture. Crops tolerant to high temperatures and drought, such as cowpea (Vigna unguiculata L. Walp.), have an added value in the near future. The main objective of this study was to evaluate the effect of drought on seed germination and seedling emergence of cowpea genotypes, in order to screen the most tolerant genotypes. Seeds from 58 cowpea genotypes all over the world were submitted to two stress conditions, induced by PEG-6000 (corresponding to osmotic potentials of −0.75 bars and −1.5 bars). Germination and seedling growth parameters, vigor index and proline content were determined to assess drought tolerance. The results revealed significant differences of all parameters among genotypes after treatments and interaction of both. Water stress caused a general decrease in germination and seedling growth, while an increase in proline content was observed. A high variation of drought responses were detected among genotypes, being possible to select seven genotypes (C11, C18, C44, C46, C47, C50 and C54) as tolerant to drought at germination stage. These results will be useful to select the best suitable parents for insertion in future breeding programs.

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“…Several authors have reported a decrease in cowpea production in the Northeast of Brazil, which can be explained by the saline soils and water found in the region, intensified by the high rate of evapotranspiration and low rainfall (FERREIRA et al, 2017;NASCIMENTO et al, 2017;OLIVEIRA et al, 2017). The species is considered moderately tolerant to salinity as it can withstand values for electrical conductivity of up to 3.3 dS m -1 for the irrigation water and 4.9 dS m -1 for the soil saturation extract (AYERS; WESTCOT, 1999).…”

Section: Introductionmentioning

confidence: 99%

Germination and Vigour in Seeds of the Cowpea in Response to Salt and Heat Stress

Nunes

Pinheiro

et al. 2019

Rev. Caatinga

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Salinity is prejudicial to plant development, causing different types of damage to species, or even between genotypes of the same species, with the effects being aggravated when combined with other types of stress, such as heat stress. The aim of this study was to evaluate the tolerance of cowpea genotypes (Vigna unguiculata L. Walp.) to salt stress at different temperatures. Seeds of the Pujante, Epace 10 and Marataoã genotypes were placed on paper rolls (Germitest®) moistened with different salt concentrations of 0.0 (control), 1.5, 3.0, 4.5 and 6.0 dS m-1, and placed in a germination chamber (BOD) at temperatures of 20, 25, 30 and 35°C. The experiment was conducted in a completely randomised design, in a 3 × 4 × 5 scheme of subdivided plots, with four replications per treatment. The variables under analysis were germination percentage, first germination count, shoot and root length, and total seedling dry weight. At temperatures of 30 and 35°C, increases in the salt concentration were more damaging to germination in the Epace 10 and Pujante genotypes, while for the Marataoã genotype, damage occurred at the temperature of 20°C. At 25°C, germination and vigour in the genotypes were higher, with the Pujante genotype proving to be more tolerant to salt stress, whereas Epace 10 and Marataoã were more tolerant to high temperatures. Germination in the cowpea genotypes was more sensitive to salt stress when subjected to heat stress caused by the low temperature of 20°C or high temperature of 35°C.

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WATER AND SALT STRESSES ON GERMINATION OF COWPEA ( Vigna unguiculata cv. BRS Tumucumaque) SEEDS

Cited by 15 publications

References 14 publications

Seed physiological quality and seedling growth of pea under water and salt stress

Seed physiological quality and seedling growth of pea under water and salt stress

Screening of worldwide cowpea collection to drought tolerant at a germination stage

Germination and Vigour in Seeds of the Cowpea in Response to Salt and Heat Stress

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