Overexpression of AtFRO6 in transgenic tobacco enhances ferric chelate reductase activity in leaves and increases tolerance to iron-deficiency chlorosis

2010 ◽  
Vol 38 (6) ◽  
pp. 3605-3613 ◽  
Author(s):  
Li-Ya Li ◽  
Qiu-Yi Cai ◽  
Dian-Si Yu ◽  
Chang-Hong Guo
Keyword(s):  
Iron Deficiency ◽  
Transgenic Tobacco ◽  
Reductase Activity ◽  
Iron Deficiency Chlorosis ◽  
Ferric Chelate Reductase ◽  
Ferric Chelate Reductase Activity

scholarly journals Nitric Oxide Acts Downstream of Auxin to Trigger Root Ferric-Chelate Reductase Activity in Response to Iron Deficiency in Arabidopsis

2010 ◽  
Vol 154 (2) ◽  
pp. 810-819 ◽  
Author(s):  
Wei Wei Chen ◽  
Jian Li Yang ◽  
Cheng Qin ◽  
Chong Wei Jin ◽  
Ji Hao Mo ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Iron Deficiency ◽  
Reductase Activity ◽  
Ferric Chelate Reductase ◽  
Ferric Chelate Reductase Activity

scholarly journals CAN COPPER AND ZINC IN DIFFERENT CHEMICAL FORMS IMPROVE IRON DEFICIENT IN PHASEOLUS PLANT

2020 ◽  
Vol 51 (1) ◽  
Author(s):  
Salama & El Fouly
Keyword(s):  
Superoxide Dismutase ◽  
Plasma Membrane ◽  
Iron Deficiency ◽  
Reductase Activity ◽  
Chemical Forms ◽  
Ferric Chelate Reductase ◽  
Iron Deficient ◽  
Ferric Chelate Reductase Activity ◽  
Root Plasma Membrane ◽  
Ionic Forms

This study was aimed to compare between the effects of different chemical forms of Zn and cupper[ionic forms (CuSO4), (Zn SO4) and chelated forms of [Cu Zn (II) HEDTA and Cu (II) HEDTA], whereas, HEDTA is N-(hydroxyethyl) ethylenediamine triacetic acid, applied at micromolar concentrations in the nutrient solution] of Phaseolus Vulgaris plants grown hydroponically under conditions of iron deficiency (- Fe) were investigated. Plant variants (– Fe + 2 µM Cu2+) and (– Fe+ 20 µM Zn2+) with extremely strong chlorosis were examined for investigations to take after the recuperation of leaf greening after treatment with Cu(II)HEDTA created leaf greening in the two variations, particularly strong for the recently which created leaf, as it appeared with chlorophyll estimations. Changes of plasma membrane reductase movement (PMRA) in roots after treatment with ionic or chelated copper were followed in (+Fe) and (– Fe) plants. The results show the increment of ferric-chelate reductase action (with substrate of Fe (III) HEDTA). Then, the cupric-chelate Cu (II) HEDTA, connected at similar level in arrangements with (– Fe) plants, kept up the high encouragement of plasma membrane ferric-chelate reductase activity. It can be concluded that the treatment with Cu (II) HEDTA enhanced the development and root plasma membrane reductase activity (PMRA) and additionally iron deficiency reactions of phaseolus plants. Regard to cell compounds increase, measurements of 20 μM of Zn altogether developed the action of the protein superoxide dismutase and peroxidase.

Root and Leaf Ferric Chelate Reductase Activity in Pond Apple and Soursop

2005 ◽  
Vol 27 (8) ◽  
pp. 1381-1393 ◽  
Author(s):  
Maritza Ojeda ◽  
Bruce Schaffer ◽  
Frederick S. Davies
Keyword(s):  
Reductase Activity ◽  
Ferric Chelate Reductase ◽  
Ferric Chelate Reductase Activity

scholarly journals CIPK23 is involved in iron acquisition of Arabidopsis by affecting ferric chelate reductase activity

Plant Science ◽  
2016 ◽  
Vol 246 ◽  
pp. 70-79 ◽  
Author(s):  
Qiuying Tian ◽  
Xinxin Zhang ◽  
An Yang ◽  
Tianzuo Wang ◽  
Wen-Hao Zhang
Keyword(s):  
Reductase Activity ◽  
Iron Acquisition ◽  
Ferric Chelate Reductase ◽  
Ferric Chelate Reductase Activity

Reduction of ferric chelates by leaf plasma membrane preparations from Fe-deficient and Fe-sufficient sugar beet

1999 ◽  
Vol 26 (6) ◽  
pp. 601 ◽  
Author(s):  
Elena B. González-Vallejo ◽  
Anunciación Abadía ◽  
Jose Antonio González-Reyes ◽  
Javier Abadía ◽  
Ana Flor López-Millán ◽  
...  
Keyword(s):  
Plasma Membrane ◽  
Citric Acid ◽  
Sugar Beet ◽  
Plasma Membranes ◽  
Ferric Iron ◽  
Reductase Activity ◽  
Tetraacetic Acid ◽  
Ferric Chelate Reductase ◽  
Ferric Chelate Reductase Activity ◽  
Optimal Ph

The ferric chelate reductase activities of leaf plasma membranes isolated from the leaves of Fe-deficient and Fe-sufficient sugar beet have been characterized. Substrates used were the complexes of ferric iron with ethylene diamine tetraacetic acid, citric acid and malic acid. Iron deficiency was associated with 1.5- to 2-fold increases in leaf plasma membrane ferric chelate reductase activity when rates were calculated on a protein basis. The natural complexes of ferric iron with citrate and especially with malate were good substrates for the ferric chelate reductase enzyme present in leaf plasma membrane preparations. The apparent affinities were higher for the ferric malate complex. The optimal pH for the activity of the ferric chelate reductase in sugar beet leaf plasma membranes was in the range 6.5–7.0. The ferric chelate reductase activity decreased by approximately 30% when the assay pH was decreased to 5.8 or increased to 7.5. Therefore, our data provide evidence against the hypothesis that changes in apoplastic pH could decrease markedly the activity of the ferric chelate reductase enzyme in plasma membrane preparations from the leaves of Fe-deficient plants.

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