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Iron Homeostasis in Rice: Deficit and Excess

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Abstract

Rice is the major food crop grown in all over the world mitigating 60–70% requirement of calories. However, its growth has always been challenged under different abiotic stress. Iron is one such important micronutrient, which pose hazardous effects to its yield and quality under both iron (Fe) deficient and excess condition. Recent research studies have attempted to overcome these iron stress constraints by understanding the function of homeostatic genes involved in it and modulating their expression through developed molecular technologies. These technologies involved overexpression of genes in iron uptake, transport, storage, along with the transcriptomics analysis of whole genome to develop a better quality of rice progenies which can withstand various adverse effects of iron stress. Iron homeostasis pathway involves Strategy I and Strategy II followed by dicotyledonous and monocotyledonous plants. However, in the case of rice, several genes involved in both strategies have found to be responsive under Fe-deficient and excess condition. Interaction of other metals present in the soil along with pH can affect the iron uptake in rice. Transgenic rice can become a strong contender in iron stress condition controlling iron uptake, translocation and storage.

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Abbreviations

FRO:

Ferric chelate reductase

IRT:

Iron-regulated transporter

MA:

Mugineic acid

NAS:

Nicotinamide synthase

NAAT:

Nicotianamine aminotransferase

DMAS:

Deoxymugineic acid

YSL:

Yellow stripe like

NRAMPs:

Natural resistance-associated macrophage proteins

TOMs:

Transporter of mugineic acid

PEZ:

Phenolics efflux zero

IDEF:

Iron-deficiency element factor (transcription factor)

FER:

Ferritin

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Authors and Affiliations

  1. Department of Life Science and Bioinformatics, Assam University, Silchar, Assam, India

    Saradia Kar & Sanjib Kumar Panda

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  1. Saradia Kar
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Correspondence to Sanjib Kumar Panda.

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Significance Statement

Understanding the genetic responses of rice plant along with the morphological changes under uttermost shift in concentrations of iron, the authors can go for the biotechnological interventions to develop the tolerant varieties of the crop that can withstand both excess and deficit condition of iron in the soil.

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Kar, S., Panda, S.K. Iron Homeostasis in Rice: Deficit and Excess. Proc. Natl. Acad. Sci., India, Sect. B Biol. Sci. 90, 227–235 (2020). https://doi.org/10.1007/s40011-018-1052-3

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