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.

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
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