Variability of soybean germplasm in relation to phosphorus uptake and use efficiency

Abstract

Plant efficiency for phosphorus uptake and utilization may contribute to improve crop yield potential in situations of low P availability. Twenty nine soybean [Glycine max (L.) Merr.] cultivars were evaluated and classified in relation to the response to phosphorus (P) levels in nutrient solution. P uptake and use efficiency were estimated by the variables: shoot and root dry matter (DM) yield, P-concentrations and contents in plant parts and P-efficiency index (EI). The experiment was conducted in a greenhouse, during 1999, at Campinas, State of São Paulo, Brazil. The experimental design consisted of randomized complete blocks, arranged in splitplots, with three replications. The main plots were the P levels in the nutrient solution (64.5; 129; 258 and 516 mmol L -1 ), and the subplots were the twenty-nine soybean cultivars, grouped according days to maturity. The plants were harvested at flowering, separated in shoots and roots for dry matter determination and chemical analysis. The analyses of variance indicated differences in plant responses to P-levels and cultivars. Multivariate analysis showed high correlation among the variables shoot-DM, total-DM and shoot P-concentration and Pefficiency index (EI).

Detection of quantitative trait loci for phosphorus deficiency tolerance at soybean seedling stage

“…It is well-documented that soybean genotypes differ greatly in adaptive mechanisms to P deficiency stress (Furlani et al 2002;Wang et al 2004). Some investigators have reported that P efficiency had, as most agronomic traits, shown continuous phenotype distributions, and was a typical quantitative trait (Chaubey et al 1994).…”

Species Level Phosphorus Acquisiti on and Internal Utilization Efficiency and Their Relation With Bottom - Up and Top - Down Factors

“…One whole plant NUE study from semiarid grassland in northern China was conducted by Yuan et al, (2006 (Furlani and Furlani, 1988;Ciarelli et al, 1998;Spehar & Souza, 1999). In addition, these non destructive techniques might be useful for those species which have low germplasm availability in nature (Furlani et al, 2002). Woody perennials exhibit a characteristic time course of phosphorus acquisition and internal P redistribution during their life cycle (Fageria et al, 2011 and.…”

Vorschau auf Heft 6/2014

“…Intra‐species differences for PAE and PUE are well known for different grain legumes and cereals. Large genotypic differences in respect of PAE and PUE were reported for soybean ( Glycine max L.; Furlani et al, 2002; Jemo et al, 2006), cowpea ( Vigna unguiculata L.; Sanginga et al, 2000; Nwoke et al., 2007), common bean ( Phaseolus vulgaris L.; Vadez et al., 1999), faba bean ( Vicia faba L.; Stelling et al, 1996; Daoui et al, 2012), and wheat ( Triticum aestivum L.; Sepehr et al, 1999; Manske et al, 2001, 2002; Korkmaz et al, 2009). Therefore, an important agronomic strategy to improve P nutrition of crops is through selection of P‐efficient varieties.…”