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Improved grain yield of cowpea (Vigna unguiculata) under water deficit after inoculation with Bradyrhizobium elkanii and Rhizophagus irregularis

Authors :
Sandra Pereira
Helena Freitas
Maria F. Carvalho
Inês Rocha
Ying Ma
Rui S. Oliveira
M. U. C. Nunes
Guilhermina Marques
Miroslav Vosátka
Luís Carlos de Souza Ferreira
Patrícia Carvalho
Repositório Científico do Instituto Politécnico do Porto
Source :
Repositório Científico de Acesso Aberto de Portugal, Repositório Científico de Acesso Aberto de Portugal (RCAAP), instacron:RCAAP
Publication Year :
2017
Publisher :
CSIRO Publishing, 2017.

Abstract

Cowpea (Vigna unguiculata (L.) Walp.), a plant broadly cultivated for human consumption and animal feed, is among the most nutritious grain legumes. Most of the areas where cowpea is grown are drought-prone, and there is a need to address this issue, with water scarcity becoming a major concern in agriculture. Cowpea is known to form mutualistic associations with nitrogen-fixing (NF) bacteria and arbuscular mycorrhizal (AM) fungi. These beneficial soil microorganisms have the capacity to benefit plants by reducing the effects of environmental stresses, including drought. Our aim was to study the effect of inoculation with Bradyrhizobium elkanii and Rhizophagus irregularis on the growth and grain yield of cowpea under water-deficit conditions. Under moderate water deficit, grain yield was increased by 63%, 55% and 84% in plants inoculated with B. elkanii, R. irregularis and B. elkanii + R. irregularis, respectively. Under severe water deficit, inoculation with B. elkanii and B. elkanii + R. irregularis resulted in grain-yield enhancement of 45% and 42%, respectively. The use of cowpea inoculated with NF bacteria and AM fungi has great potential for sustainable agricultural production under drought conditions.

Details

ISSN :
18360947
Volume :
68
Database :
OpenAIRE
Journal :
Crop and Pasture Science
Accession number :
edsair.doi.dedup.....7dde2410fe0b10e34683048542f3af67
Full Text :
https://doi.org/10.1071/cp17087