Research Article Iron excess in rice: from phenotypic changes to functional genomics of WRKY transcription factors.

Viana, Vívian Ebeling; Marini, Naciele; Finatto, Taciane; Ezquer, Ignacio; Busanello, Carlos; Santos, Railson Schreinert dos; Pegoraro, Camila; Colombo, Lucia; Oliveira, Antônio Costa de

doi:10.4238/gmr16039694

Cited by 18 publications

(23 citation statements)

References 31 publications

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“…But the other potent regulators and the genes participated in the Fe-excess responsive pathway are still largely unknown. Viana et al (2017) reported that the cis-regulatory elements involved in responses to abiotic stresses, such as light and salicylic acid pathway, participate in the molecular signaling involved in the response to Fe excess. However, promoter analyses of the functional cis-acting elements for the core Fe excess-responsive in rice still needs to be identified.…”

Section: Gene Response and Regulatory Mechanism To The Fe Toxicity Inmentioning

confidence: 99%

“… Viana et al. (2017) reported that the cis -regulatory elements involved in responses to abiotic stresses, such as light and salicylic acid pathway, participate in the molecular signaling involved in the response to Fe excess.…”

Section: Future Prospects For Crops Tolerant To Excess Fementioning

confidence: 99%

“…Furthermore, microarray analyses have yielded 19 upregulated WRKYs in Fe-excess rice ( Finatto et al., 2015 ). Then, OsWRKY55-like , OsWRKY46 , OsWRKY64 , and OsWRKY113 are upregulated in an Fe-sensitive genotype, and OsWRKY55-like may be involved in the early stress response ( Viana et al., 2017 ). Considering these results, some WRKY genes may also involve in defense mechanisms 1, 2 and 3 in addition to defense 4 ( Figure 2 ).…”

Section: Future Prospects For Crops Tolerant To Excess Fementioning

confidence: 99%

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How Does Rice Defend Against Excess Iron?: Physiological and Molecular Mechanisms

Aung

Masuda

2020

Front. Plant Sci.

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Iron (Fe) is an essential nutrient for all living organisms but can lead to cytotoxicity when present in excess. Fe toxicity often occurs in rice grown in submerged paddy fields with low pH, leading dramatical increases in ferrous ion concentration, disrupting cell homeostasis and impairing growth and yield. However, the underlying molecular mechanisms of Fe toxicity response and tolerance in plants are not well characterized yet. Microarray and genome-wide association analyses have shown that rice employs four defense systems to regulate Fe homeostasis under Fe excess. In defense 1, Fe excess tolerance is implemented by Fe exclusion as a result of suppression of genes involved in Fe uptake and translocation such as OsIRT1,

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Section: Gene Response and Regulatory Mechanism To The Fe Toxicity Inmentioning

confidence: 99%

Section: Future Prospects For Crops Tolerant To Excess Fementioning

confidence: 99%

Section: Future Prospects For Crops Tolerant To Excess Fementioning

confidence: 99%

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How Does Rice Defend Against Excess Iron?: Physiological and Molecular Mechanisms

Aung

Masuda

2020

Front. Plant Sci.

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“…However, it is still not clear exactly how the interactions between CW polymers relate to wall mechanics, and how transcription factors (TFs) impinge on intracellular structures during developmental processes in response to environmental signals. Many TFs such as MYBs, AP2/EREBP, WRKYs, MADS-box, or ERFs have been reported to play key functions in biotic and abiotic stress responses [10,[70][71][72][73][74][75][76]. Developmental programs are regulated by complex networks both at the transcriptional and post-transcriptional level, including, not yet fully explored, epigenetic switches [73,[77][78][79].…”

Section: The Interaction Of Cell Wall Polymers In Developmental Procementioning

confidence: 99%

Plant Cell Walls Tackling Climate Change: Biotechnological Strategies to Improve Crop Adaptations and Photosynthesis in Response to Global Warming

Ezquer

Salameh

Colombo

et al. 2020

Plants

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Plant cell wall (CW) is a complex and intricate structure that performs several functions throughout the plant life cycle. The CW of plants is critical to the maintenance of cells' structural integrity by resisting internal hydrostatic pressures, providing flexibility to support cell division and expansion during tissue differentiation, and acting as an environmental barrier that protects the cells in response to abiotic stress. Plant CW, comprised primarily of polysaccharides, represents the largest sink for photosynthetically fixed carbon, both in plants and in the biosphere. The CW structure is highly varied, not only between plant species but also among different organs, tissues, and cell types in the same organism. During the developmental processes, the main CW components, i.e., cellulose, pectins, hemicelluloses, and different types of CW-glycoproteins, interact constantly with each other and with the environment to maintain cell homeostasis. Differentiation processes are altered by positional effect and are also tightly linked to environmental changes, affecting CW both at the molecular and biochemical levels. The negative effect of climate change on the environment is multifaceted, from high temperatures, altered concentrations of greenhouse gases such as increasing CO 2 in the atmosphere, soil salinity, and drought, to increasing frequency of extreme weather events taking place concomitantly, therefore, climate change affects crop productivity in multiple ways. Rising CO 2 concentration in the atmosphere is expected to increase photosynthetic rates, especially at high temperatures and under water-limited conditions. This review aims to synthesize current knowledge regarding the effects of climate change on CW biogenesis and modification. We discuss specific cases in crops of interest carrying cell wall modifications that enhance tolerance to climate change-related stresses; from cereals such as rice, wheat, barley, or maize to dicots of interest such as brassica oilseed, cotton, soybean, tomato, or potato. This information could be used for the rational design of genetic engineering traits that aim to increase the stress tolerance in key crops. Future growing conditions expose plants to variable and extreme climate change factors, which negatively impact global agriculture, and therefore further research in this area is critical.

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“…The key regulators of plasma membrane transporters OsA1 to OsA10 , OsIRT1 , OsIRT2 , OsFRO2 , and OsZIP1 to OsZIP10 are directly involved in Fe capture [2,16,19,22,119]. In addition to that, fundamental helix-loop-helix transcription factors regulate the expression of FRO2 that is involved in regulating Fe uptake [45,120,121].…”

Section: Physiological Basis Of Tolerance Of Ft and Fdmentioning

confidence: 99%

Tolerance of Iron-Deficient and -Toxic Soil Conditions in Rice

Mahender

Swamy

Anandan

et al. 2019

Plants

141

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Iron (Fe) deficiency and toxicity are the most widely prevalent soil-related micronutrient disorders in rice (Oryza sativa L.). Progress in rice cultivars with improved tolerance has been hampered by a poor understanding of Fe availability in the soil, the transportation mechanism, and associated genetic factors for the tolerance of Fe toxicity soil (FTS) or Fe deficiency soil (FDS) conditions. In the past, through conventional breeding approaches, rice varieties were developed especially suitable for low- and high-pH soils, which indirectly helped the varieties to tolerate FTS and FDS conditions. Rice-Fe interactions in the external environment of soil, internal homeostasis, and transportation have been studied extensively in the past few decades. However, the molecular and physiological mechanisms of Fe uptake and transport need to be characterized in response to the tolerance of morpho-physiological traits under Fe-toxic and -deficient soil conditions, and these traits need to be well integrated into breeding programs. A deeper understanding of the several factors that influence Fe absorption, uptake, and transport from soil to root and above-ground organs under FDS and FTS is needed to develop tolerant rice cultivars with improved grain yield. Therefore, the objective of this review paper is to congregate the different phenotypic screening methodologies for prospecting tolerant rice varieties and their responsible genetic traits, and Fe homeostasis related to all the known quantitative trait loci (QTLs), genes, and transporters, which could offer enormous information to rice breeders and biotechnologists to develop rice cultivars tolerant of Fe toxicity or deficiency. The mechanism of Fe regulation and transport from soil to grain needs to be understood in a systematic manner along with the cascade of metabolomics steps that are involved in the development of rice varieties tolerant of FTS and FDS. Therefore, the integration of breeding with advanced genome sequencing and omics technologies allows for the fine-tuning of tolerant genotypes on the basis of molecular genetics, and the further identification of novel genes and transporters that are related to Fe regulation from FTS and FDS conditions is incredibly important to achieve further success in this aspect.

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Research Article Iron excess in rice: from phenotypic changes to functional genomics of WRKY transcription factors.

Cited by 18 publications

References 31 publications

How Does Rice Defend Against Excess Iron?: Physiological and Molecular Mechanisms

How Does Rice Defend Against Excess Iron?: Physiological and Molecular Mechanisms

Plant Cell Walls Tackling Climate Change: Biotechnological Strategies to Improve Crop Adaptations and Photosynthesis in Response to Global Warming

Tolerance of Iron-Deficient and -Toxic Soil Conditions in Rice

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