Effect of iron supply and nitrogen form on growth, nutritional status and ferric reducing activity of spinach in nutrient solution culture

Assimakopoulou, Anna

doi:10.1016/j.scienta.2006.06.010

Cited by 30 publications

(21 citation statements)

References 28 publications

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“…In this medium, the increased Fe availability may have resulted in a reduced availability of other micronutrients as a result of antagonistic effects. This phenomenon is well documented for Mn (Ghasemi-Fasaei et al 2003;Izaguirre-Mayoral and Sinclair 2005;Chatterjee et al 2006) and Zn (Heitholt et al 2003;Assimakopoulou 2006). Also, metal sorption on Fe oxides reduces its concentration in solution and its availability to plants and microbes (Harter 1991;Montilla et al 2003).…”

Section: Discussionmentioning

confidence: 93%

Effect of Trichoderma asperellum strain T34 on iron, copper, manganese, and zinc uptake by wheat grown on a calcareous medium

et al. 2010

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Rhizosphere microbes may enhance nutrient uptake by plants. Here we studied the effect of Trichoderma asperellum inoculation on the uptake of Fe, Cu, Mn, and Zn by wheat (Triticum aestivum L) grown in a calcareous medium. To this end, an experiment involving two factors, namely Fe enrichment (ferrihydrite enrichment and non-enrichment of the growing medium), and inoculation/non-inoculation with Trichoderma asperellum strain T34, was performed twice under the same conditions. The increase in Fe availability as a result of ferrihydrite enrichment did not enhance plant dry matter production. The effect of T34 on the concentration of Fe, Cu, Mn and Zn, and the total amount of Cu, Mn, and Zn in the aerial parts differed depending on the degree of ferrihydrite enrichment. Inoculation with T34 increased Fe concentration in Fe-deficient media, thus revealing a positive effect of this microorganism on Fe nutrition in wheat. However, T34 significantly decreased the concentration and total amount of Cu, Mn, and Zn in the aerial parts, but only in ferrihydrite-enriched medium. This adverse effect of T34 on Cu, Mn, and Zn uptake by wheat plants may have been related to conditions of restricted availability where potential competition for nutrients between microorganisms and plants can be more marked.

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Section: Discussionmentioning

confidence: 93%

Effect of Trichoderma asperellum strain T34 on iron, copper, manganese, and zinc uptake by wheat grown on a calcareous medium

et al. 2010

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“…W hen soybean is infected with an effective Bradyrhizobium japonicum strain, symbiotic N 2 fixation results in H + release into the rhizosphere and a reducing environment in the root nodule (Gibson, 1980). When fertilizer N (NO 3 − ) is added, nodulation and N 2 fixation are reduced (Gibson and Harper, 1985; Herridge and Brockwell, 1988; Wiersma and Orf, 1992) and rhizosphere pH and [ OH − ] increase (Assmakopoulou, 2006; Jimenez et al, 2007; Zhao and Ling, 2007 and references therein). Even though Fe deficiency often can be asymptomatic when soybean is grown in Fe chlorosis‐prone soils, Fe stress response mechanisms are turned on and off as needed to maintain adequate Fe concentrations.…”

mentioning

confidence: 99%

Nitrate‐Induced Iron Deficiency in Soybean Varieties with Varying Iron‐Stress Responses

Wiersma

2010

Agronomy Journal

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Planting soybean [(Glycine max (L.) Merr.] into Fe chlorosis‐prone soils where soybean has seldom, if ever, been grown may require special precautions to establish effective Bradyrhizonium japonicum populations, while simultaneously providing adequate levels of N for the current crop. However, adding fertilizer N likely will increase rhizosphere pH and [ OH− ] and, thus, promote Fe deficiency. Our objective was to determine whether varieties (Vs) that differed in Fe efficiency also differed in their response to added N fertilizer when grown on chlorosis‐prone soils. Six varieties (2 Fe efficient, 2 moderately Fe efficient, and 2 Fe inefficient) and six rates of fertilizer N (0, 34, 68, 102, 136, and 170 kg N ha−1) were evaluated during 2003, 2004, and 2005 using soils belonging to the soil subgroup, Aeric Calciaquolls. Growing conditions in 2004 were colder and wetter than either 2003 or 2005, whereas DTPA‐extractable Fe was twofold greater in 2004. Extractable Fe did not necessarily reflect available Fe as relative chlorophyll concentrations (SPAD readings), seed number and weight, and grain yield were all significantly (P < 0.05) less in 2004. Nodulation decreased linearly in response to added N for all varieties, regardless of their Fe efficiency characterization or yearly growing conditions. SPAD readings differed markedly among Vs (22.1–33.8), but showed little response to increasing nitrogen rates (NR) (27.8–30.7). Plant height, seed number, and grain yield all decreased linearly in response to increasing NRs for Fe‐inefficient Vs, whereas these responses in Fe‐efficient and moderately efficient Vs changed little as NR increased. Our results strongly suggest that N should not be applied when Fe‐inefficient Vs are grown on Fe chlorosis‐prone soils.

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“…Lycopersicon esculentum Mill. ]; Zhao and Ling, 2007), spinach ( Spinacia oleracea L.; Assmakopoulou et al, 2006), and grape ( Vitis vinifera L.; Jimenez et al, 2007).…”

Section: Resultsmentioning

confidence: 99%

Is Seed Iron Concentration Predictive of Resistance to Iron Deficiency in Soybean?

Wiersma

2012

Crop Science

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Within the last decade, studies involving numerous crops provide strong evidence that seed Fe concentration ([Fe]) is useful for identifying genotypes possessing superior resistance to Fe deficiency. It is our opinion that using seed [Fe] is equivalent or superior to using visual chlorosis score as a measure of Fe efficiency, that seed [Fe] can be used to identify resistance to Fe deficiency in the absence of Fe deficiency or in the presence of Fe deficiency exacerbated by applying high rates of fertilizer N, that conventional plant breeding can be used to increase seed [Fe] as a strategy for improving resistance to Fe deficiency, and that planting seed [Fe] can be used as a predictor of successful (nonchlorotic) seedling establishment. International agricultural agencies, such as HarvestPlus (CIAT, Cali, Columbia), have promoted using plant breeding as an intervention strategy focused on increasing micronutrient concentrations and bioavailabilities in crops consumed by populations with known micronutrient deficiencies. Can conventional plant breeding be used to increase seed [Fe] as a strategy to reduce Fe deficiency in soybean [Glycine max (L.) Merr.]? Evidence presented in this paper combined with earlier reports indicates that Fe‐efficient and Fe‐inefficient varieties appear to have seed [Fe] maxima that are distinctly different and seldom exceeded; that is, soybean plants tend to maintain [Fe] in the grain within predetermined, genetically controlled limits. Seed [Fe] can be regarded as an integrated measure of resistance to Fe deficiency that is manifest at maturity and that involves the coordinate expression of several genes regulating Fe reduction and uptake, transport, and storage.

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Effect of iron supply and nitrogen form on growth, nutritional status and ferric reducing activity of spinach in nutrient solution culture

Cited by 30 publications

References 28 publications

Effect of Trichoderma asperellum strain T34 on iron, copper, manganese, and zinc uptake by wheat grown on a calcareous medium

Effect of Trichoderma asperellum strain T34 on iron, copper, manganese, and zinc uptake by wheat grown on a calcareous medium

Nitrate‐Induced Iron Deficiency in Soybean Varieties with Varying Iron‐Stress Responses

Is Seed Iron Concentration Predictive of Resistance to Iron Deficiency in Soybean?

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