Influence of iron nutrition on sulphur uptake and metabolism in maize (<i>Zea mays</i>L.) roots

Astolfi, Stefania; Zuchi, Sabrina; Cesco, Stefano; Varanini, Zeno; Pinton, Roberto

doi:10.1080/00380768.2004.10408577

Cited by 23 publications

(16 citation statements)

References 19 publications

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“…However, changes in Fe content in tomato leaves in the Fe-and in the S-starvation treatment were similar and, in particular, Fe content in S starvation leaves also decreased by nearly 60%. In our previous works (AstolW et al 2003(AstolW et al , 2004, we found that maize and barley plants exposed to S starvation showed a lower Fe content than S-suYcient plants. It has been proposed that S starvation might decrease the accumulation of Fe in the leaf tissue by inhibiting Fe uptake primarily as a consequence of decreasing the PS release capacity of the roots (AstolW et al 2006a, b).…”

Section: Discussionmentioning

confidence: 98%

“…It has been demonstrated that S deWciency may limit the release of PS and Fe uptake in barley roots, thus leading to a reduced accumulation of Fe in the leaf tissue (AstolW et al 2006a). Furthermore, it has been shown that Fe deWciency caused an increase in 35 SO 4 2¡ uptake rates in maize and barley plants (AstolW et al 2004(AstolW et al , 2006b.…”

Section: Discussionmentioning

confidence: 98%

“…Interactions between S and Fe nutrition have been shown in Strategy II plants (Kuwajima and Kawai 1997;AstolW et al 2003AstolW et al , 2004AstolW et al , 2006aBouranis et al 2003), indicating that S deWciency could limit Fe-deWciency response through a decrease in the production and release of PS.…”

Section: Introductionmentioning

confidence: 98%

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Sulphur deprivation limits Fe-deficiency responses in tomato plants

Zuchi

Cesco

Varanini

et al. 2009

Planta

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111

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The aim of this work was to clarify the role of S supply in the development of the response to Fe depletion in Strategy I plants. In S-sufficient plants, Fe-deficiency caused an increase in the Fe(III)-chelate reductase activity, 59Fe uptake rate and ethylene production at root level. This response was associated with increased expression of LeFRO1 [Fe(III)-chelate reductase] and LeIRT1 (Fe2+ transporter) genes. Instead, when S-deficient plants were transferred to a Fe-free solution, no induction of Fe(III)-chelate reductase activity and ethylene production was observed. The same held true for LeFRO1 gene expression, while the increase in 59Fe2+ uptake rate and LeIRT1 gene over-expression were limited. Sulphur deficiency caused a decrease in total sulphur and thiol content; a concomitant increase in 35SO4(2-) uptake rate was observed, this behaviour being particularly evident in Fe-deficient plants. Sulphur deficiency also virtually abolished expression of the nicotianamine synthase gene (LeNAS), independently of the Fe growth conditions. Sulphur deficiency alone also caused a decrease in Fe content in tomato leaves and an increase in root ethylene production; however, these events were not associated with either increased Fe(III)-chelate reductase activity, higher rates of 59Fe uptake or over-expression of either LeFRO1 or LeIRT1 genes. Results show that S deficiency could limit the capacity of tomato plants to cope with Fe-shortage by preventing the induction of the Fe(III)-chelate reductase and limiting the activity and expression of the Fe2+ transporter. Furthermore, the results support the idea that ethylene alone cannot trigger specific Fe-deficiency physiological responses in a Strategy I plant, such as tomato.

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 98%

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Sulphur deprivation limits Fe-deficiency responses in tomato plants

Zuchi

Cesco

Varanini

et al. 2009

Planta

Self Cite

111

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“…On the other hand, the interactions between iron nutrition and sulfur nutrition have received increasing attention. The finding that methionine is the sole percursor of mugineic acid [30] and the demonstration that the methionine cycle (or Yang cycle) in roots is one of the methionine sources [31] led Astolfi et al [21,32,33] to further investigate the interactions between Fe nutrition and S nutrition, concluding that "the interaction can occur determining rapid adjustments of sulfate uptake and assimilation which conceivably lead to a re-distribution of reduced S pool. Fe availability might represent a signal able to modulate production and utilization of thiols at root level, where phytosiderophores are effectively synthesized" [32].…”

Section: Discussionmentioning

confidence: 99%

Effect of Elemental Sulfur as Fertilizer Ingredient on the Mobilization of Iron from the Iron Pools of a Calcareous Soil Cultivated with Durum Wheat and the Crop’s Iron and Sulfur Nutrition

et al. 2018

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Abstract:The granules of conventional fertilizers have been enriched recently with 2% elemental sulfur (S 0 ) via a binding material of organic nature and such fertilizers are suitable for large scale agriculture. In a previous work, we demonstrated that a durum wheat crop that received the enriched fertilization scheme (FBS 0 -crop) accumulated a higher amount of Fe compared to the durum wheat crop fertilized by the corresponding conventional fertilization scheme (F-crop). In this study, we investigated the effect of S 0 on the contingent mobilization of iron from the iron pools of the calcareous field that affiliated the durum wheat crop and the corresponding effect on the crop's iron nutrition and sulfur nutrition. A sequential extraction of Fe from root zone soil (rhizosoil) was applied and the fluctuations of these fractions during crop development were monitored. The fertilization with FBS 0 at sowing affected the iron fractions of the rhizosoil towards iron mobilization, thus providing more iron to the crop, which apart from the iron nutrition fortified the crop's sulfur nutrition, too. No iron was found as iron attached to carbonates of the rhizosoil. Fluctuations of the iron pool, bound or adsorbed to the organic matter, were exactly the opposite to those of the iron pool associated with the clay particles in both treatments, suggesting iron exchange between the two pools. Replenishment of the F-crop's Fe content and a deficit in the FBS 0 -crop's Fe content in the rhizosoil were found at the end of the cultivation period. Furthermore, the initiation of the fast stem elongation stage (day 125) constituted a turning point. Before day 125, the use of FBS 0 increased the iron concentration in the main stems and this was an early fortification effect, followed by an increase in the organic S concentration. Following day 125, the FBS 0 -crop consisted of plants with higher main stems and less tillers. A late fortification effect was observed in the iron concentration of the main stems and their heads after the stage of complete flowering. Prior to harvesting in the FBS 0 -crop, all plant parts were heavier, with more iron and organic sulfur accumulated in these plant parts, and the obtained commercial yield of the FBS 0 -crop was higher by 27.3%.

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“…This was demonstrated in physiological uptake studies using intact roots or leaf discs, which showed that under Fe deficiency nitrate uptake and, in particular, Fe translocation from roots to shoots is inhibited (Nikolic et al 2004a). In contrast, Fe deficiency increased sulfate uptake by 11 and 55% in S-sufficient and Sdeficient maize roots, respectively, but decreased ATP sulfurylase activity, the first step in sulfate assimilation (Astolfi et al 2004). Thus, Fe deficiency might have opposite effects on the acquisition and assimilation of nutrients and it will be interesting to learn whether these differential effects are related to a physiological involvement of these nutrients in the Fe deficiency stress response.…”

Section: Membrane Transport and Translocation Of Fementioning

confidence: 99%

Progress in research on iron nutrition and interactions in plants

Wirén

2004

Soil Science and Plant Nutrition

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Iron is an essential microelement for plants and can be a limiting or toxic element according to the environmental growth conditions. Plants have therefore developed a large range of physiological mechanisms to cope with Fe deficiency or Fe overload. The application of molecular biological methods have shed light on the genes, gene products and regulatory mechanisms involved in Fe stress responses, however, the acquisition of physiological data now begins to lagg behind the progress gained by molecular approaches. This review highlights and summarizes the recent progress in plant iron research achieved from the molecular level to the field scale, communicated at the "XIIth International Symposium on Iron Nutrition and Interactions in Plants" held in 2004 in Tokyo.

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Influence of iron nutrition on sulphur uptake and metabolism in maize (Zea maysL.) roots

Cited by 23 publications

References 19 publications

Sulphur deprivation limits Fe-deficiency responses in tomato plants

Sulphur deprivation limits Fe-deficiency responses in tomato plants

Effect of Elemental Sulfur as Fertilizer Ingredient on the Mobilization of Iron from the Iron Pools of a Calcareous Soil Cultivated with Durum Wheat and the Crop’s Iron and Sulfur Nutrition

Progress in research on iron nutrition and interactions in plants

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