| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 1.13 MB | Adobe PDF |
Advisor(s)
Abstract(s)
To provide information towards optimization of strategies to treat Fe deficiency, experiments were
conducted to study the responses of Fe-deficient plants to the resupply of Fe. Strawberry
(Fragaria ananassa Duch.) was used as model plant. Bare-root transplants of strawberry (cv. ‘Diamante’)
were grown for 42 days in Hoagland's nutrient solutions without Fe (Fe0) and containing 10 mM of Fe as
Fe-EDDHA (control, Fe10). For plants under Fe0 the total chlorophyll concentration of young leaves
decreased progressively on time, showing the typical symptoms of iron chlorosis. After 35 days the Fe
concentration was 6% of that observed for plants growing under Fe10. Half of plants growing under Fe0
were then Fe-resupplied by adding 10 mM of Fe to the Fe0 nutrient solution (FeR). Full Chlorophyll recovery
of young leaves took place within 12 days. Root ferric chelate-reductase activity (FCR) and succinic
and citric acid concentrations increased in FeR plants. Fe partition revealed that FeR plants expressively
accumulated this nutrient in the crown and flowers. This observation can be due to a passive deactivation
mechanism of the FCR activity, associated with continuous synthesis of succinic and citric acids at root
level, and consequent greater uptake of Fe.
Description
Research Article
Keywords
Fragaria ananassa iron deficiency nutrients organic acids recovery
Pedagogical Context
Citation
Plant Physiology and Biochemistry 104 (2016) 36-44
Publisher
Elsevier