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Agronomy 2018, 8(8), 148;

Similarities and Differences in the Acquisition of Fe and P by Dicot Plants

Deparment of Botany, Ecology and Plant Physiology, University of Cordoba, Edificio C-4, Campus de Rabanales, 14071 Córdoba, Spain
IFAPA, Alameda del Obispo Center, Area of Improvement and Biotechnology, Avda. Menédez Pidal s/n, Apdo. 3092, 14004 Córdoba, Spain
Deparment of Agronomy, University of Cordoba, Edificio C-4, Campus de Rabanales, 14071 Córdoba, Spain
Author to whom correspondence should be addressed.
Received: 29 June 2018 / Revised: 11 August 2018 / Accepted: 13 August 2018 / Published: 15 August 2018
(This article belongs to the Special Issue Plant Mineral Nutrition: Principles and Perspectives)
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This review deals with two essential plant mineral nutrients, iron (Fe) and phosphorus (P); the acquisition of both has important environmental and economic implications. Both elements are abundant in soils but are scarcely available to plants. To prevent deficiency, dicot plants develop physiological and morphological responses in their roots to specifically acquire Fe or P. Hormones and signalling substances, like ethylene, auxin and nitric oxide (NO), are involved in the activation of nutrient-deficiency responses. The existence of common inducers suggests that they must act in conjunction with nutrient-specific signals in order to develop nutrient-specific deficiency responses. There is evidence suggesting that P- or Fe-related phloem signals could interact with ethylene and NO to confer specificity to the responses to Fe- or P-deficiency, avoiding their induction when ethylene and NO increase due to other nutrient deficiency or stress. The mechanisms responsible for such interaction are not clearly determined, and thus, the regulatory networks that allow or prevent cross talk between P and Fe deficiency responses remain obscure. Here, fragmented information is drawn together to provide a clearer overview of the mechanisms and molecular players involved in the regulation of the responses to Fe or P deficiency and their interactions. View Full-Text
Keywords: iron; phosphorus; ethylene; nitric oxide; phloem signals iron; phosphorus; ethylene; nitric oxide; phloem signals

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Lucena, C.; Porras, R.; Romera, F.J.; Alcántara, E.; García, M.J.; Pérez-Vicente, R. Similarities and Differences in the Acquisition of Fe and P by Dicot Plants. Agronomy 2018, 8, 148.

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