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Mechanism of Fe uptake by the leaf symplast: Is Fe inactivation in leaf a cause of Fe deficiency chlorosis?
dc.creator | Nikolic, Miroslav | |
dc.creator | Romheld, V | |
dc.date.accessioned | 2022-04-05T14:01:01Z | |
dc.date.available | 2022-04-05T14:01:01Z | |
dc.date.issued | 1999 | |
dc.identifier.issn | 0032-079X | |
dc.identifier.uri | http://rimsi.imsi.bg.ac.rs/handle/123456789/47 | |
dc.description.abstract | The mechanism of iron (Fe) uptake from the leaf apoplast into leaf mesophyll cells was studied to evaluate the putative Fe inactivation as a possible cause of Fe deficiency chlorosis. For this purpose, sunflower (Helianthus annuus L.) and faba bean plants (Vicia faba L.) were precultured with varied Fe and bicarbonate (HCO3-) supply in nutrient solution. After 2-3 weeks preculture, Fe-III reduction and Fe-59 uptake by leaf discs were measured in solutions with Fe supplied as citrate or synthetic chelates in darkness. The data clearly indicate that Fe-III reduction is a prerequisite for Fe uptake into leaf cells and that the Fe nutritional status of plants does not affect either process. In addition, varied supply of Fe and HCO3- to the root medium during preculture had no effect on pH of the xylem sap and leaf apoplastic fluid. A varied pH of the incubation solution had no significant effect on Fe-III reduction and Fe uptake by leaf discs in the physiologically relevant pH range of 5.0-6.0 as measured in the apoplastic leaf fluid. It is concluded that Fe inactivation in the leaf apoplast is not a primary cause of Fe deficiency chlorosis induced by bicarbonate. | en |
dc.publisher | Springer, Dordrecht | |
dc.rights | restrictedAccess | |
dc.source | Plant and Soil | |
dc.subject | Vicia faba L. | en |
dc.subject | leaf apoplast | en |
dc.subject | iron uptake | en |
dc.subject | Helianthus annuus L. | en |
dc.subject | Fe-III citrate reduction | en |
dc.subject | Fe inactivation | en |
dc.title | Mechanism of Fe uptake by the leaf symplast: Is Fe inactivation in leaf a cause of Fe deficiency chlorosis? | en |
dc.type | article | |
dc.rights.license | ARR | |
dc.citation.epage | 237 | |
dc.citation.issue | 2 | |
dc.citation.other | 215(2): 229-237 | |
dc.citation.rank | aM21 | |
dc.citation.spage | 229 | |
dc.citation.volume | 215 | |
dc.identifier.doi | 10.1023/A:1004786211779 | |
dc.identifier.scopus | 2-s2.0-0343415518 | |
dc.identifier.wos | 000084528800015 | |
dc.type.version | publishedVersion |