Screening of cowpea cultivars for resistance to leaf smut

RENDIMENTO DE CULTIVARES DE CAUPI (Vigna unguiculata L Walp.) SUBMETIDAS À DIFERENTES LÂMINAS DE IRRIGAÇÃO1 Gianini Peixoto Bezerra Lima José Vanglesio de Aguiar Raimundo Nonato Távora Costa Universidade Federal do Ceará – Departamento de Engenharia Agrícola. Campus do Pici. Bloco 804. CEP 60455-760 – Fortaleza-CE Vital Pedro da Silva Paz Escola Superior de Agricultura Luiz de Queiroz – Departamento de Engenharia Rural, bolsista da FAPESP. Av. Pádua Dias, 11 – Caixa Postal 11. 13418-900 – Piracicaba-SP 1 RESUMO O caupi é um dos cultivos mais tradicionais do Norte e Nordeste do Brasil, constituindo alimento básico nestas regiões. Com este trabalho foi possível estabelecer relações entre a quantidade de água aplicada e produtividade de grãos, para três variedades de feijão caupi submetidas a diferentes lâminas de água. Para caracterização das lâminas de água foi utilizado um sistema de irrigação por aspersão convencional em linha. O controle da irrigação foi realizado a partir de tensiômetros instalados à 15 cm de profundidade. Os resultados mostraram que: i) a cultivar João Paulo II apresentou melhores resultados de produtividade para as lâminas de água aplicadas que variaram de T1 = 291,8 mm a T5 = 141,2 mm; ii) sob condições de reduzida disponibilidade de água, ou seja, menor lâmina aplicada, não ocorreu diferença estatística para a produtividade entre as cultivares estudadas; e iii) para as condições do estudo, a cultivar Setentão apresentou a menor taxa de redução do produto marginal. UNITERMOS: caupi, irrigação, função de produção LIMA, G. P. B., AGUIAR, J. V., COSTA, R. N. T., PAZ, V. P. S. Responses OF cowpea cultivars (Vigna unguiculata L Walp) at differents irrigation deficits 2 ABSTRACT The caupi is one of the most traditional cultivation of the north and northeast - Brazil, constituting a basic food in these areas. With this work it was possible to establish relationships between the amount of water applied and productivity of grains, for three caupi varieties submitted to different irrigation sheets. To diferentiate water depths in the irrigation system, the aspersion in line was used. The control of the irrigation was accomplished using tensiometers installed to 15 cm of depth. The results showed that: i) the João Paulo II variety presented better productivity for the applied water depths; ii) under reduced conditions of water avai lability for study conditions, these was no significant difference in the productivity reached among the cultivars studied; and iii) for the conditions of the study, the variety Setentão presented the smallest rate of reduction of the marginal product. KEYWORDS: cowpea, irrigation, production function

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Survey of Chinese Cowpea Cultivars for Phenolic Compounds and Antioxidant Activity

Current Topics in Nutraceutical Research ◽

10.37290/ctnr2641-452x.17:337-348 ◽

2018 ◽

Vol 17 (4) ◽

pp. 337-348

Author(s):

Bai Zhouya ◽

Huang Xiaojun ◽

Meng Jinxia ◽

Kan Lijiao ◽

Nie Shaoping

Keyword(s):

Phenolic Compounds ◽

Phenolic Content ◽

Antioxidant Activities ◽

Jiangxi Province ◽

Total Phenolic ◽

Total Flavonoid Content ◽

Flavonoid Content ◽

Comprehensive Investigation ◽

Cowpea Cultivars ◽

P Distribution

Distribution of phenolic compounds and antioxidant activities was surveyed in 24 varieties of Chinese cowpea from 4 provinces. Identity of phytochemicals were determined by UPLC-ESIQTOF-MS/MS and quantified by HPLC-ESI-QqQ-MS/MS. Seven phenolic acids, 16 flavonoids and 9 other compounds were identified and several of these were quantified. Quercetin-3-glucoside and kaempferol-glucoside were the major phenolic compounds. In addition, our study indicated that OJYDH cultivar from Jiangxi province had the highest total phenolic content, total flavonoid content and stronger antioxidant activities than other cowpea cultivars. This study made a comprehensive investigation on antioxidants from cowpea and provided the useful data to support its function.

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Seed-borne fungi of cowpea [Vigna unguiculata (L.) Walp] and their possible control in vitro using locally available fungicides in Botswana.

International Journal of Bioassays ◽

10.21746/ijbio.2016.11.005 ◽

2016 ◽

Vol 5 (11) ◽

pp. 5016 ◽

Cited By ~ 1

Author(s):

K. B. Khare* ◽

Loeto D. ◽

Wale K. ◽

Salani M.

Keyword(s):

Seed Germination ◽

Continuous Light ◽

Sodium Hypochlorite Solution ◽

Distilled Water ◽

Percentage Germination ◽

Department Of Agriculture ◽

Hypochlorite Solution ◽

Cowpea Cultivars ◽

Petri Plate

Seeds of three cowpea cultivars namely Black eye, ER 7 and Tswana obtained from the Department of Agriculture Research, Gaborone were tested for the presence of seed-borne fungi, and their possible control in vitro using locally available fungicides. Four hundred fifty seeds of each cultivar of cowpea were disinfected with 2% sodium hypochlorite solution for 10 min and washed three times with sterile distilled water before placing them in PDA plates (5 seeds/9 cm Petri plate), incubated at 22±2o C for 12 hour each under continuous light and dark. A total of eight fungi were detected from seeds of cowpea. These were Aspergillus flavus, A. niger, Cylindrocarpon sp., Fusarium equisiti, F. oxyaporum, Penicillium chyrosogenum, Rhizopus oligosporus and R. stolonifer. Rhizopus spp. were dominant fungi recovered from seeds, followed by Penicillium, Aspergillus, Fusarium and Cylindrocarpon. The fungi detected resulted in decay and rotting of seeds, and thereby reducing percentage germination of seeds (22%, 37% and 63 % seed germination in Black eye, ER7 and Tswana varieties of cowpea respectively). Out of four fungicides tested, benlate, captan, dithane M 45 and chlorothalanil. Dithane M45 effectively controlled seed-borne fungi, and enhanced seed germination to an average of 86% (93% germination with no fungi detected in Tswana variety) as compared to chlorothalonile (79%), benlate and captan (77%) and un-treated seeds (45%). The fungal incidence was reduced to 2.3%, 4.3%, 5.3% and 5.3% when seeds were treated with dithane M-45, chlorothalonil, benlate and captan respectively as compared to 62% in non-treated seeds.

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Thecaphora dahuangis , a new species causing leaf smut disease of the traditional medicinal plant dahuang ( Rheum palmatum ) in China

Plant Pathology ◽

10.1111/ppa.13385 ◽

2021 ◽

Author(s):

Marcin Piątek ◽

Matthias Lutz ◽

Yan Wang ◽

Shengrong Wang ◽

Ronny Kellner

Keyword(s):

New Species ◽

Medicinal Plant ◽

Rheum Palmatum ◽

A New Species ◽

Leaf Smut

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Selection of cowpea cultivars for high temperature tolerance: physiological, biochemical and yield aspects

Physiology and Molecular Biology of Plants ◽

10.1007/s12298-020-00919-7 ◽

2021 ◽

Author(s):

Juliane Rafaele Alves Barros ◽

Miguel Julio Machado Guimarães ◽

Rodrigo Moura e Silva ◽

Maydara Thaylla Cavalcanti Rêgo ◽

Natoniel Franklin de Melo ◽

...

Keyword(s):

High Temperature ◽

Temperature Tolerance ◽

Cowpea Cultivars ◽

High Temperature Tolerance ◽

Selection Of

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Photosynthetic efficiency and production of cowpea cultivars under deficit irrigation

Ambiente e Agua - An Interdisciplinary Journal of Applied Science ◽

10.4136/ambi-agua.2133 ◽

2018 ◽

Vol 13 (5) ◽

pp. 1 ◽

Cited By ~ 1

Author(s):

Alberto Soares de Melo ◽

Allisson Rafael Ferreira da Silva ◽

Alexson Filgueiras Dutra ◽

Wellison Filgueiras Dutra ◽

Marcos Eric Barbosa Brito ◽

...

Keyword(s):

Water Deficit ◽

Deficit Irrigation ◽

Photosynthetic Efficiency ◽

Arid Regions ◽

Carbon Fixation ◽

Management Strategies ◽

Carbon Assimilation ◽

Green Beans ◽

Gas Exchanges ◽

Cowpea Cultivars

Cowpea is a crop with great economic, social and food importance in semi-arid regions, but its production is drastically reduced by the water deficit in these regions, requiring better management strategies that allow the crop’s production. This study therefore aimed to evaluate the photosynthetic efficiency and production of cowpea cultivars under deficit irrigation replacement levels. The experiment tested three cowpea genotypes (G1 = ‘BRS Aracé’, G2 = ‘BR 17 Gurguéia’ and G3 = ‘BRS Marataoã’) and four irrigation depths (40, 60, 80 and 100% of ETc), resulting in a 3 x 4 factorial scheme, arranged in randomized complete blocks design with four replicates. During the experiment, the gas exchanges, chlorophyll a fluorescence and production of the cowpea genotypes under deficit irrigation were evaluated. Carbon fixation in the photosynthetic metabolism of cowpea plants was reduced by accentuated water deficit, regardless of the genotype. The low stress severity was indicated by the lack of effects on chlorophyll fluorescence, indicating that the reduction in the rate of carbon assimilation was due to the stomatal effects. The irrigation with 80% of ETc can be used in the cultivation of the respective cultivars, but with small losses in the production. Among the genotypes, ‘BRS Marataoã’ stands out with respect to yield, with higher values for weight of pods and green beans.

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Physicochemical and functional properties of two cowpea cultivars grown in temperate Indian climate

Cogent Food & Agriculture ◽

10.1080/23311932.2015.1099418 ◽

2015 ◽

Vol 1 (1) ◽

pp. 1099418 ◽

Cited By ~ 6

Author(s):

Saima Hamid ◽

Sabeera Muzzafar ◽

Idrees Ahmed Wani ◽

Farooq Ahmad Masoodi ◽

Fatih Yildiz

Keyword(s):

Functional Properties ◽

Cowpea Cultivars ◽

Physicochemical And Functional Properties

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Aphelenchoides besseyi parasitizing cowpea (Vigna unguiculata) in Brazil

Plant Disease ◽

10.1094/pdis-06-21-1232-sc ◽

2021 ◽

Author(s):

Luciany Favoreto ◽

Rafaela Bueno ◽

Angélica Calandrelli ◽

Patrícia Priscila França ◽

Mauricio Conrado Meyer ◽

...

Keyword(s):

Common Bean ◽

Vigna Unguiculata ◽

Host Reaction ◽

First Report ◽

Cowpea Cultivars ◽

The World ◽

Cotton Plants ◽

Aphelenchoides Besseyi ◽

Leaf Deformation

Several species of nematodes are known to cause losses to cowpea (Vigna unguiculata) throughout the world. In Brazil, Aphelenchoides besseyi was recently described causing damages on soybean, cotton, and common bean, but no report was found about the parasitism of this nematode in cowpea. The present study aimed to verify the host reaction of cowpea cultivars to A. besseyi. The experiment was conducted under greenhouse conditions, using as inoculum two A. besseyi populations, obtained from symptomatic soybean and cotton plants collected in naturally infested fields. Cultivars ‘Imponente’, ‘Aracê’, ‘Guariba’, ‘Tumucumaque’, ‘Nova Era’, and ‘Tracuateua’ were inoculated with 500 A. besseyi of each population, separately, into soil and after 30 days from the inoculation nematodes were extracted from shoot systems. Both populations were able to parasitize all the cowpea cultivars. Independently of the cultivar, cowpea plants exhibited symptoms of leaf deformation similar to those described for soybean, cotton, and common bean and, in addition, severe brooming was observed and the interior of the stems was porous and necrotic. To our knowledge, this is the first report of parasitism by A. besseyi of cowpea in Brazil, under greenhouse conditions, increasing the list of hosts of this nematode.

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GENOTYPIC VARIATION ON THE ANTIOXIDATIVE RESPONSE OF COWPEACULTIVARS EXPOSED TO OSMOTIC STRESS

Revista Caatinga ◽

10.1590/1983-21252017v30n413rc ◽

2017 ◽

Vol 30 (4) ◽

pp. 928-937 ◽

Cited By ~ 1

Author(s):

EDILENE DANIEL DE ARAÚJO ◽

ALBERTO SOARES DE MELO ◽

MARIA DO SOCORRO ROCHA ◽

REBECA FERREIRA CARNEIRO ◽

MAURISRAEL DE MOURA ROCHA

Keyword(s):

Osmotic Stress ◽

Genotypic Variation ◽

Potassium Nitrate ◽

Proline Content ◽

Stress Factors ◽

Cowpea Cultivars ◽

Stages Of Growth ◽

Antioxidative Response ◽

Increased Activity ◽

Osmotic Potentials

ABSTRACT The cowpea [Vigna unguiculata (L.) Walp.], also known as cowpea, is of fundamental socioeconomic importance to the northeast of Brazil, and has become one of the main sources of protein in the diet of the rural population. However, in this region, it has become necessary to identify genotypes that are better adapted to drought. In addition, research is needed regarding the action of substances that promote tolerance to stress factors. The aim of this study was to evaluate the antioxidative response of cowpea cultivars under osmotic stress conditions using potassium nitrate as an attenuator. Five osmotic potentials were tested in the substrate (0.0, −0.2, −0.4, −0.6, and −0.8 MPa), and three seed treatments (pre-soaking in distilled water, pre-soaking in potassium nitrate, and without pre-soaking) were tested in three cowpea cultivars (BRS Itaim, BRS Aracê, and BRS Potengi). The design was randomized with 45 treatments and four replications. The data were submitted to analysis of variance (P < 0.05), and in cases of significance, regression analysis was conducted to quantitate the factors. Our results indicate that an increase in proline content in cowpea plants may be seen as indicative of the intensity of water stress on germination and the initial stages of growth of the plant. The BRS Itaim cultivar best tolerates drought conditions with the application of potassium nitrate, given the increased activity of antioxidant enzymes such as superoxide dismutase, catalase, and ascorbate peroxidase.

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