NADH oxidation, H+ efflux, and nutrient ion uptake of soybean roots
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Keywords

NAD (Coenzyme)
NADH oxidation
Soybeans

How to Cite

Bidlack, J., Ramírez-Oliveras, G., & Stutte, C. A. (1989). NADH oxidation, H+ efflux, and nutrient ion uptake of soybean roots. The Journal of Agriculture of the University of Puerto Rico, 73(4), 375-380. https://doi.org/10.46429/jaupr.v73i4.6316

Abstract

Soybean [Glycine max (L.) Merr.] yields are influenced by the nutrient content of the soil which might, in turn, be reflected by the ability of roots to efflux hydrogen ions (H+). Regulation of Hefflux by NADH oxidation was investigated to evaluate the physiological response of Hefflux and its relation to soybean yield among different cultivars. Enzyme assays and pH measurements were used to monitor NADH oxidation and Hefflux by soybeans grown in a controlled-environmental chamber. Nutrient content, and yields of biomass and seed were measured with field-grown soybeans. Dry matter yields were determined for relative treatment comparisons in all experiments. Dry weights of different soybean cultivars were negatively correlated to NADH oxidation and positively correlated to Hefflux. Comparison of 'Davis' and 'Forrest' soybeans indicated that dry weight, seed yield, and nutrient-ion contents were negatively correlated to NADH oxidation and positively correlated to Hefflux. These fidings suggest that soybean nutrition and yield are closely interrelated with oxidation-reduction reactions in the plant's root tissues. Favorable growth and yield performance appears to require a supply of Hions. The efflux of these ions, in turn, appears to favor nutrient uptake and hence growth and yield potential. The chemical supplier of Hions remains obscure and NADH might or might not be a contributor.

https://doi.org/10.46429/jaupr.v73i4.6316
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