NDLI: Ureide essay to assess N$_{2}$-fixation abilities of soybean (Glycine max) genotypes under different Bradyrhizobium strains

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Ureide essay to assess N$_{2}$-fixation abilities of soybean (Glycine max) genotypes under different Bradyrhizobium strains

Content Provider	Springer Nature Link
Author	Agoyi, Eric E. Afutu, Emmanuel Chadare, Flora J. Tumuhairwe, John B. Chigeza, Godfree Tukamuhabwa, Phinehas
Copyright Year	2017
Abstract	The high protein content of soybean (Glycine max) seeds results in high nitrogen demand, causing a huge nitrogen uptake during plant growth. As a legume crop, soybean can fix atmospheric N through symbiotic associations with Bradyrhizobia and perform well in African nitrogen poor soils. This study aimed at establishing the ability of promiscuous soybean genotypes to fix nitrogen and devise the relationship between nodule scores and amount of nitrogen fixed. Twelve soybean genotypes were inoculated with Bradyrhizobium japonicum Strain USDA 110 (specific) and Bradyrhizobium sp. Strain USDA 3456 (native) and raised in pots in a greenhouse. At the R3.5 growth stage, nodules were scored and xylem sap was extracted, which xylem sap was used to carry out ureide, amino-N, and nitrates assays. The relative abundance of ureide was used to devise the proportion of nitrogen fixed by each genotype. The proportion of nitrogen derived from atmospheric N2 (Ndfa) ranged from 47.9 to 78.8% under USDA 3456 and from 36.7 to 78.7% under USDA 110. A strong correlation was found between nodule scores, especially nodules’ effectiveness, and Ndfa. The genotypes Wondersoya (78.8%), Maksoy 2N (78.4%), Namsoy 3 (78.3%), and Maksoy 3N (75.7%) had high nitrogen-fixing ability in response to USDA 3456. Promiscuous soybean genotypes can fix nitrogen equally under both native and specific Bradyrhizobium types. Nodules’ effectiveness can be a good predictor of biological nitrogen fixation. This study highlighted that crop improvement to boost soybean production in Africa should target promiscuous varieties for better yield with less inputs.
Starting Page	65
Ending Page	72
Page Count	8
File Format	PDF
ISSN	19759479
Journal	Journal of Crop Science and Biotechnology
Volume Number	20
Issue Number	2
e-ISSN	20058276
Language	English
Publisher	The Korean Society of Crop Science
Publisher Date	2017-06-29
Publisher Place	Suwon
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Promiscuous soybean Bradyrhizobium sp. Strain USDA 3456 Glycine max (L. Merr.) ureide nitrates Plant Sciences Plant Genetics & Genomics Plant Pathology Plant Physiology Biotechnology
Content Type	Text
Resource Type	Article
Subject	Plant Science Biotechnology Agronomy and Crop Science

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Ureide essay to assess N$_{2}$-fixation abilities of soybean (Glycine max) genotypes under different Bradyrhizobium strains

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Ureide essay to assess N$_{2}$-fixation abilities of soybean (Glycine max) genotypes under different Bradyrhizobium strains