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5. Interaction Between Sulfur and Iron in Plants

Author

Astolfi, S., Celletti, S., Vigani, G., Mimmo, T., and Cesco, S.

Subjects
citrate, interaction, iron, methionine, nicotianamine, sulfur, food and beverages, iron, sulfur, interaction, methionine, nicotianamine, citrate, Review, Plant Science
Abstract

It is well known that S interacts with some macronutrients, such as N, P, and K, as well as with some micronutrients, such as Fe, Mo, Cu, Zn, and B. From our current understanding, such interactions could be related to the fact that: (i) S shares similar chemical properties with other elements (e.g., Mo and Se) determining competition for the acquisition/transport process (SULTR transporter family proteins); (ii) S-requiring metabolic processes need the presence of other nutrients or regulate plant responses to other nutritional deficiencies (S-containing metabolites are the precursor for the synthesis of ethylene and phytosiderophores); (iii) S directly interacts with other elements (e.g., Fe) by forming complexes and chemical bonds, such as Fe-S clusters; and (iv) S is a constituent of organic molecules, which play crucial roles in plants (glutathione, transporters, etc.). This review summarizes the current state of knowledge of the interplay between Fe and S in plants. It has been demonstrated that plant capability to take up and accumulate Fe strongly depends on S availability in the growth medium in both monocots and dicot plants. Moreover, providing S above the average nutritional need enhances the Fe content in wheat grains, this beneficial effect being particularly pronounced under severe Fe limitation. On the other hand, Fe shortage induces a significant increase in the demand for S, resulting in enhanced S uptake and assimilation rate, similar to what happens under S deficiency. The critical evaluation of the recent studies on the modulation of Fe/S interaction by integrating old and new insights gained on this topic will help to identify the main knowledge gaps. Indeed, it remains a challenge to determine how the interplay between S and Fe is regulated and how plants are able to sense environmental nutrient fluctuations and then to adapt their uptake, translocation, assimilation, and signaling. A better knowledge of the mechanisms of Fe/S interaction might considerably help in improving crop performance within a context of limited nutrient resources and a more sustainable agriculture.

Published
2021
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12. Root-shoot-root Fe translocation in cucumber plants grown in a heterogeneous Fe provision

Author

Valentinuzzi, F., Pii, Y., Carlo, P., Roberto, T., Fontanella, Maria Chiara, Beone, Gian Maria, Astolfi, S., Mimmo, T., Cesco, S., Fontanella M. C. (ORCID:0000-0002-7667-0532), Beone G. M. (ORCID:0000-0002-5124-860X), Valentinuzzi, F., Pii, Y., Carlo, P., Roberto, T., Fontanella, Maria Chiara, Beone, Gian Maria, Astolfi, S., Mimmo, T., Cesco, S., Fontanella M. C. (ORCID:0000-0002-7667-0532), and Beone G. M. (ORCID:0000-0002-5124-860X)

Abstract

Iron (Fe) is an essential micronutrient for plant life and development. However, in soil, Fe bioavailability is often limited and variable in space and time, thus different regions of the same root system might be exposed to different nutrient provisions. Few studies showed that the response to variable Fe provision is controlled at local and systemic levels, albeit the identity of the signals involved is still elusive. Iron itself was suggested as local mediator, whilst hormones were proposed for the long-distance signalling pathway. Therefore, the aim of this work was to assess whether Fe, when localized in a restricted area of the root system, might be involved in both local and systemic signaling. The combination of resupply experiments in a split-root system, the use of 57Fe isotope and chemical imaging techniques allowed tracing Fe movement within cucumber plants. Soon after the resupply, Fe is distributed to the whole plant, likely to overcome a minimum Fe concentration threshold aimed at repressing the deficiency response. Iron was then preferentially translocated to leaves and, only afterwards, the root system was completely resupplied. Collectively, these observations might thus highlight a root-to-shoot-to-root Fe translocation route in cucumber plants grown on a patchy nutrient substrate.

Published
2020

27. BIOCHEMICAL AND PHYSIOLOGICAL RESPONSE TO PSEUDOMONAS SYRINGAE PV. TOMATO IN NORMAL AND GOX-TRANSGENIC VERSIONS OF TWO TOMATO NEAR ISOGENIC LINES

Author

DE BIASI, MARGHERITA-GABRIELLA, MARABOTTINI R., ACAMPORA A., ASTOLFI S., ZUCHI S., ANTONELLI M. G., FONZO V., SANTANGELO E., CACCIA R, BADIANI M., VARVARO L., SORESSI G. P., DE BIASI, MARGHERITA-GABRIELLA, Marabottini, R., Acampora, A., Astolfi, S., Zuchi, S., Antonelli, M. G., Fonzo, V., Santangelo, E., Caccia, R, Badiani, M., Varvaro, L., and Soressi, G. P.

Published
2003

36. The possible role of zinc and ozone defence mechanism system in wheat

Author

DE BIASI, MARGHERITA-GABRIELLA, ASTOLFI S., PAOLACCI A. R., AIUTI S., MARABOTTINI R., NALI G, LORENZINI A, BURINELLO A, BADIANI M., Fuhrer J. & Achermann B. (Eds.)., DE BIASI, MARGHERITA-GABRIELLA, Astolfi, S., Paolacci, A. R., Aiuti, S., Marabottini, R., Nali, G, Lorenzini, A, Burinello, A, and Badiani, M.

Published
1999

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