Show simple item record Munjonji, Lawrence Ayisi, Kingsley K. Boeckx, Pascal Haesaert, Geert 2020-06-29T15:39:26Z 2020-06-29T15:39:26Z 2017-12-23
dc.identifier.issn 1937-0695
dc.identifier.issn 1937-0709
dc.description Article published in the Sustainability.; vol 10, 12 doi:10.3390/su10010012 en_US
dc.description.abstract Drought is a major limitation to crop productivity worldwide. Plants lose most of their water through stomata, thus making stomata an important organ in the control of transpiration and photosynthesis. This study assessed the stomatal behavior of four cowpea genotypes grown under four moisture levels under hot semi-arid conditions. Stomatal conductance (gs) was measured at 47, 54, 70 and 77 days after planting (DAP). Biomass and carbon isotope composition ( 13C) were also determined at flowering. Genotype and moisture level significantly influenced gs. Genotypes varied in gs at vegetative stages (47 and 54 DAP) only. TVu4607 had higher gs under severe drought conditions at both 47 and 54 DAP. On the other hand, moisture level influenced gs at 54 and 70 DAP only. Stomatal conductance was severely restricted in cowpea under both moderate and severe drought conditions as gs was mostly below the threshold 0.10 mol m􀀀2 s􀀀1. Relationships between:biomass and gs, and 13C and gs were positive under severe drought only. The findings revealed that cowpea genotypes vary in gs under dry conditions and that the variation is more prominent at vegetative stage, suggesting that cowpea productivity in dry areas could be improved through selection of genotypes that maintain higher gs under dry conditions. en_US
dc.format.extent 16 pages en_US
dc.language.iso en en_US
dc.publisher Sustainability en_US
dc.relation.requires pdf en_US
dc.subject Carbon isotope composition en_US
dc.subject Cowpea en_US
dc.subject Stomatal conductance en_US
dc.subject Water stress en_US
dc.subject.lcsh Drought en_US
dc.subject.lcsh Food security -Climatic factors en_US
dc.subject.lcsh Plants-Effect of drought on en_US
dc.title Stomatal Behavior of Cowpea Genotypes Grown Under Varying Moisture Levels en_US
dc.type Article en_US

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