Investigations of the Role of Iron in Chlorophyll Metabolism. II. Effect of Iron Deficiency on Chlorophyll Synthesis

Marsh, H. V.; Evans, Harold J.; Matrone, Gennard

doi:10.1104/pp.38.6.638

Cited by 69 publications

(25 citation statements)

References 14 publications

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“…In plants, iron deficiency leads to chlorotic leaves with green veins because iron is required for chlorophyll synthesis (Marsh et al, 1963). Globally, iron is a relatively abundant micronutrient, but is sometimes insufficient for plant growth because of its poor solubility in soil (Kim and Guerinot, 2007).…”

Section: Introductionmentioning

confidence: 99%

The Arabidopsis Mediator subunit MED16 regulates iron homeostasis by associating with EIN3/EIL1 through subunit MED25

et al. 2014

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These authors contributed equally to this work. SUMMARYIron is an essential micronutrient for plants and animals, and plants are a major source of iron for humans. Therefore, understanding the regulation of iron homeostasis in plants is critical. We identified a T-DNA insertion mutant, yellow and sensitive to iron-deficiency 1 (yid1), that was hypersensitive to iron deficiency, containing a reduced amount of iron. YID1 encodes the Arabidopsis Mediator complex subunit MED16. We demonstrated that YID1/MED16 interacted with another subunit, MED25. MED25 played an important role in regulation of iron homeostasis by interacting with EIN3 and EIL1, two transcription factors in ethylene signaling associated with regulation of iron homeostasis. We found that the transcriptome in yid1 and med25 mutants was significantly affected by iron deficiency. In particular, the transcription levels of FIT, IRT1 and FRO2 were reduced in the yid1 and med25 mutants under iron-deficient conditions. The finding that YID1/MED16 and MED25 positively regulate iron homeostasis in Arabidopsis increases our understanding of the complex transcriptional regulation of iron homeostasis in plants.

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Section: Introductionmentioning

confidence: 99%

The Arabidopsis Mediator subunit MED16 regulates iron homeostasis by associating with EIN3/EIL1 through subunit MED25

et al. 2014

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“…Fe is also essential for plant growth, being required for various cellular activities ranging from photosynthesis to respiration. Fe deficiency results in inhibiting chlorophyll synthesis in leaves (Marsh et al 1963). Almost all higher plants, including Solanum lycopersicum (tomato), cannot take up ferric iron [Fe(III)] from the soil.…”

Section: Introductionmentioning

confidence: 99%

Effect of <i>Pseudomonas fluorescens</i> inoculation on the improvement of iron deficiency in tomato

Nagata

2017

Plant Root

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with the growth of the control. However, the mechanism of iron absorption has not been clarified yet. Two-week-old seedlings were transferred to a liquid medium inoculated with P. fluorescens. After incubating for four days, the iron concentration of plants increased compared with that of non-symbiotic seedlings. Moreover, the expression of the Fe(II) transporter IRT1 and Nramp3 was analyzed by qRT-PCR. The expression of IRT1 was not induced until day 7 but that of Nramp3 was induced in four days. In addition, Fe(III) chelate reductase (FRO) activity was high in symbiotic seedlings after four days. These results suggest that the chelated Fe(III) was reduced to Fe(II) by FRO and taken up by Nramp3. Siderophore-mediated Fe(III) uptake by tomato is believed to be a useful strategy for increasing iron uptake from the environment.

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“…was vacuum-filtered through an asbestos-coated funnel, and the residue was resuspended volume of the extraction solution and filtrates were combined and the residue, fluorescent, was discarded. The combined with an equal volume of petroleum ether [39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58] to remove Crystalline standards of copro and proto methyl esters were hydrolyzed in 3 N HCl for 12 hr. This yielded a mixture of partial esters as chromatographic standards (20).…”

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confidence: 99%

Induction of Porphyrin Synthesis in Etiolated Bean Leaves by Chelators of Iron

Duggan¹,

Gassman²

1974

Plant Physiol.

135

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Investigations of the Role of Iron in Chlorophyll Metabolism. II. Effect of Iron Deficiency on Chlorophyll Synthesis

Cited by 69 publications

References 14 publications

The Arabidopsis Mediator subunit MED16 regulates iron homeostasis by associating with EIN3/EIL1 through subunit MED25

The Arabidopsis Mediator subunit MED16 regulates iron homeostasis by associating with EIN3/EIL1 through subunit MED25

Effect of <i>Pseudomonas fluorescens</i> inoculation on the improvement of iron deficiency in tomato

Induction of Porphyrin Synthesis in Etiolated Bean Leaves by Chelators of Iron

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