Cowpea (Vigna unguiculata L. Walp) hosts several widespread bradyrhizobial root nodule symbionts across contrasting agro-ecological production areas in Kenya

Ndungu, Samuel Mathu; Messmer, Monika; Ziegler, Dominik; Gamper, Hannes A.; Mészáros, Éva; Thuita, Moses; Vanlauwe, Bernard; Frossard, Emmanuel; Thonar, Cécile

doi:10.1016/j.agee.2017.12.014

Cited by 50 publications

(39 citation statements)

References 61 publications

(84 reference statements)

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“…The study also found that the farmers are willing to allocate up to 10% of their land for the production of cowpeas. The greatest constraint in the production of cowpea leaves currently being experienced in Kenya is that it is majorly limited to small-scale farming (Ndungu et al, 2018).…”

Section: Some Of the Cowpea Varieties That Have Been Grown In Tanzanimentioning

confidence: 99%

A review of the contribution of cowpea leaves to food and nutrition security in East Africa

Owade

Abong

Okoth

et al. 2019

Food Science & Nutrition

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Cowpea leaf is among the African indigenous vegetables that have been recommended for possible alleviation of food and nutrition insecurity in sub‐Saharan Africa (SSA). The vegetable is rich in micronutrients including iron and vitamin A whose deficiencies are prevalent in SSA. Considering the limitation of seasonal availability, preservation techniques have been adopted to enhance availability with little success. This review aims at highlighting the contribution of cowpeas leaves to food and nutrition security as well as research gaps that must be addressed to promote the utilization of value‐added forms that would have extended effect of improving its production and consumption. It was found that preserved and fresh cowpea leaves were rich in beta‐carotene and iron in the ranges of 0.25–36.55 and 0.17–75.00 mg/100 g dry weight, respectively. The proportion of rural households incorporating the vegetable in its various forms in the region can be as high as 30%. With adequate utilization, the vegetable provided up to ≥ 75% and 25% of RDAs for vitamin A and iron, respectively, of children aged 4–8. However, the utilization of preserved forms faced a limitation for a deviation of up to 30% in their sensory scores and decreased nutrient content as compared to the fresh ones hugely hindered their market penetration. Utilization of novel processing techniques incorporating concept of hurdle technology can help address these quality losses. In conclusion, preservation of cowpea leaves should seek not only to enhance the shelf‐life, but also to enhance acceptability of the products with a view of increased utilization.

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Section: Some Of the Cowpea Varieties That Have Been Grown In Tanzanimentioning

confidence: 99%

A review of the contribution of cowpea leaves to food and nutrition security in East Africa

Owade

Abong

Okoth

et al. 2019

Food Science & Nutrition

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“…Otros genes identificados por PCR son 16S rRNA (Akemi et al, 2017;Jaiswal, Msimbira, & Dakora, 2017;Tahon & Willems, 2017), porque permite una clasificación filogenética más detallada a nivel de especie (Osei, Abaidoo, Ahiabor, & Boddey, 2018;Ribeiro et al, 2018), genes rec A, atpD, gln II y nod C con análisis de secuencia multilocus (MLSA) (Leite et al, 2017;Mwenda, Hara, De Meyer, Howieson, & Terpolilli, 2018;Rigonato et al, 2017). Con esta técnica, se ha logrado identificar el gen nifH en géneros Paenibacillus, Enterobacter, Klebsiella y Pantoea (Ndungu et al, 2018), que no son reconocidos por fijar nitrógeno, de modo que es posible que hayan obtenido la capacidad de fijación de nitrógeno a través de la transferencia lateral de genes; sin embargo, las fuerzas evolutivas de la transferencia lateral de genes no son bien conocidas (Khalifa & AlMalki, 2018).…”

Section: Técnicas Pcr Identificación De Los Genes Nifhunclassified

Técnicas aplicadas en la investigación agrícola para cuantificar la fijación de nitrógeno: una revisión sistemática

Fonseca-López

Quila

Balaguera-López

2019

CTA

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La economía del nitrógeno es un tema que viene creciendo a nivel mundial, especialmente en la actividad agrícola cuando por mal manejo de la fertilización ocurren pérdidas por lixiviación que contribuyen a la eutrofización del agua, lo que incrementa la población de algas y, como efecto, reduce la disponibilidad de oxígeno, acelerando el proceso de desnitrificación en el que se produce N2O, conocido por su efecto en el calentamiento global. Igualmente, parte del fertilizante es emitido a la atmósfera por volatización. Esto ha impulsado la creación de técnicas que permiten cuantificar el nitrógeno utilizado por las plantas y el fijado en el suelo a través de microrganismos para hacer más eficiente el empleo del nitrógeno en los sistemas agrícolas. Sin embargo, dentro de las mayores limitantes se encuentra su sensibilidad, especificidad, costo y tecnología que se requiere para aplicarlas. Esto ha conducido a la innovación de procedimientos y a la creación de técnicas que tienen una tasa de error muy bajo. El objetivo de este trabajo fue realizar la descripción de las principales técnicas utilizadas para cuantificar la fijación del nitrógeno con énfasis en los antecedentes, procedimientos, expresiones matemáticas que se usan, y escenarios futuros. La información se describe a partir del análisis de ensayos disponibles en la base de datos Scopus. Este trabajo consolida las técnicas que continúan vigentes para cuantificar el nitrógeno y facilita entender su uso a través del tiempo con modelos de predicción, así como su importancia, ventajas y desventajas.

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“…The tribe Crotalarieae, for instance, is largely endemic to SSA (14 endemic genera comprising over 1,000 species) and known for its high microsymbiont diversity, including Bradyrhizobium, Rhizobium, Methylobacterium, Microvirga, Mesorhizobium, Ensifer , and Burkholderia (Aserse et al, 2012 ; Sprent et al, 2013 ; Ndungu et al, 2018 ). Earlier studies using DNA fingerprinting already indicated a high microsymbiont diversity in SSA regions (Botha et al, 2004 ; Law et al, 2007 ).…”

Section: Putative Bradyrhizobium Diversity To Be Umentioning

confidence: 99%

Diversity of Bradyrhizobia in Subsahara Africa: A Rich Resource

Grönemeyer

Reinhold‐Hurek

2018

Front. Microbiol.

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Making use of biological nitrogen fixation (BNF) with pulses and green manure legumes can help to alleviate nitrogen deficiencies and increase soil fertility, problems faced particularly in smallholder agriculture in Subsahara Africa (SSA). The isolation of indigenous rhizobia provides a basis for the formulation of rhizobial inoculants. Moreover, their identification and characterization contribute to the general understanding of species distribution and ecology. Here we discuss global species discovery of Bradyrhizobium spp. Although recently the number of validly published Bradyrhizobium species is rapidly increasing, their diversity in SSA is not well-represented. We summarize the recent knowledge on species diversity in the Bradyrhizobium yuanmingense lineage to which most SSA isolates belong, and their biogeographic distribution and adaptations. Most indigenous rhizobia appear to differ from species found on other continents. We stress that an as yet hidden diversity may be a rich resource for inoculant development in future. As some species are exceptionally temperature tolerant, they may be potential biofertilizer candidates for global warming scenarios.

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Cowpea (Vigna unguiculata L. Walp) hosts several widespread bradyrhizobial root nodule symbionts across contrasting agro-ecological production areas in Kenya

Cited by 50 publications

References 61 publications

A review of the contribution of cowpea leaves to food and nutrition security in East Africa

A review of the contribution of cowpea leaves to food and nutrition security in East Africa

Técnicas aplicadas en la investigación agrícola para cuantificar la fijación de nitrógeno: una revisión sistemática

Diversity of Bradyrhizobia in Subsahara Africa: A Rich Resource

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