Mn use efficiency in different wheat cultivars

ECA3, a Golgi-Localized P2A-Type ATPase, Plays a Crucial Role in Manganese Nutrition in Arabidopsis

“…Not only is there variability between plant species in their ability to grow on low Mn, but there are also considerable differences among genotypes of the same species (Pedas et al, 2005). Varieties displaying tolerance to Mn deficiency have been termed Mn efficient (Pedas et al, 2005;Jiang, 2006), but the mechanisms underlying this have not been clearly defined. In barley, differential capacity for high-affinity Mn influx is thought to contribute to Mn efficiency; in wheat, it may be due to improved internal utilization rather than higher Mn accumulation (Jiang, 2006).…”

“…Varieties displaying tolerance to Mn deficiency have been termed Mn efficient (Pedas et al, 2005;Jiang, 2006), but the mechanisms underlying this have not been clearly defined. In barley, differential capacity for high-affinity Mn influx is thought to contribute to Mn efficiency; in wheat, it may be due to improved internal utilization rather than higher Mn accumulation (Jiang, 2006). ECA3 homologs could play a role in the Mn efficiency of crop species and there is the potential in the future to test whether expression of AtECA3 could improve Mn efficiency.…”

“…Both Mn deficiency and excess Mn accumulation can result in severely decreased crop yield. Mn deficiency is one of the most widespread trace element deficiencies for arable crops, often seen in cereals such as wheat (Triticum aestivum) and barley (Hordeum vulgare;Jiang, 2006). Plants deficient in Mn appear chlorotic and growth is reduced (Shenker et al, 2004).…”

How Soil Nutrient Availability Influences Plant Biomass and How Biomass Stimulation Alleviates Heavy Metal Toxicity in Soils: The Cases of Nutrient Use Efficient Genotypes and Phytoremediators, Respectively

“…Many researchers found significant differences concerning nutrient utilization efficiency among genotypes (cultivars) of the same plant species [1,12,13,40,[44][45][46] Biomass (shoot and root dry matter production) was used as an indicator in order to assess Zn efficient Chinese maize genotypes, grown for 30 days in a greenhouse pot experiment under Zn limiting conditions [1]. NUE is based on: a) uptake efficiency, b) incorporation efficiency and c) utilization efficiency [40].…”

“…The uptake efficiency is the ability of a genotype to absorb nutrients from the soil; however, the great ability to absorb nutrients does not necessarily mean that this genotype is nutrient use efficient. According to Jiang and Ireland (2005) [45], and Jiang (2006) [46], Mn efficient wheat cultivars own this ability to a better internal utilization of Mn, rather than to a higher plant Mn accumulation. We also found in our experiments that, despite the fact that the olive cultivar 'Kothreiki' absorbed and accumulated significantly greater quantity of Mn and Fe in three soil types, compared to 'Koroneiki', the second one was more Mn and Fe-efficient due to its better internal utilization efficiency of Mn and Fe (greater transport of these micronutrients from root to shoots) [12] (Tables 1 and 2).…”