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Literature summary for 1.16.1.7 extracted from

  • Kosegarten, H.; Hoffmann, B.; Rroco, E.; Grolig, F.; Gluesenkamp, K.H.; Mengel, K.
    Apoplastic pH and FeIII reduction in young sunflower (Helianthus annuus) roots (2004), Physiol. Plant., 122, 95-106.
No PubMed abstract available

Application

Application Comment Organism
agriculture main reason for iron deficiency chlorosis of plants grown on calcareous soils is the inhibition of FeIII reduction in the apoplast and hence Fe2+ uptake into the cytosol Helianthus annuus

Localization

Localization Comment Organism GeneOntology No. Textmining
plasmalemma
-
Helianthus annuus
-
-

Organism

Organism UniProt Comment Textmining
Helianthus annuus
-
-
-

Source Tissue

Source Tissue Comment Organism Textmining
root
-
Helianthus annuus
-

pH Range

pH Minimum pH Maximum Comment Organism
additional information
-
high pH sensitivity of enzyme, highest activity at apoplastic pH of 4.9, no activity above apoplastic pH of 5.3. Nitrate increases pH value, thus inhibiting enzyme activity, ammonium decreases pH value. Nitrate together with hydrogen carbonate, a combination typical for calcareous soils, has strongest enzyme depressing effect Helianthus annuus