Fluoride stress affects seed germination and seedling growth by altering the morpho-physiology of an African local bean variety

Increased fluorine pollution represents a serious limitation for the productivity of important crops such as beans. The present study was conducted to detect antagonistic/synergistic ion mobility during seed germination in the presence of F contamination (KF and NaF). NaCl was used as a benchmark. T...

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Bibliographic Details
Published in:Plant growth regulation 2024-03, Vol.102 (2), p.339-350
Main Authors: Chahine, Sara, Melito, Sara, Giannini, Vittoria, Seddaiu, Giovanna, Roggero, Pier Paolo
Format: Article
Language:English
Subjects:
Agriculture
Beans
Biomedical and Life Sciences
Chlorophyll
Contamination
Dietary minerals
Environmental degradation
Fluorides
Fluorine
Food
Germination
Ionic mobility
Life Sciences
Metabolism
Morphology
Natural resources
Nutrition
Original Paper
Physiology
Plant Anatomy/Development
Plant growth
Plant Physiology
Plant Sciences
Potassium fluoride
Salinity
Seed germination
Seedlings
Seeds
Sodium chloride
Sorghum
Toxicity
Vegetables
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Summary:Increased fluorine pollution represents a serious limitation for the productivity of important crops such as beans. The present study was conducted to detect antagonistic/synergistic ion mobility during seed germination in the presence of F contamination (KF and NaF). NaCl was used as a benchmark. The results showed that germination of Jesca, an African (Tanzania) bean variety, significantly dropped with high F levels (10% KF and 3% NaF). High F levels reduced Jesca growth and decreased root and shoot biomass (by 50% and 95% with KF and NaF, respectively). NaF 200 mg kg −1 had the most depressive effect on the seedling stage. Elevated F levels negatively affected seedling health, revealing toxicity symptoms such as chlorophyll degradation and low photosynthetic activities that degraded after a threshold level of 80 mg kg −1 . In addition, an inhibitory effect of F on the mineral status of the seedlings, especially on the Ca content, was observed. An opposite trend of endogenous Ca response to NaCl stress was observed. Indeed, while endogenous Ca content increased with increasing NaCl concentration, it decreased when the F level increased. Therefore, tolerance to F at the germination and seedling stages might be used as a criterion for selecting F-tolerant bean varieties.
ISSN:0167-6903
1573-5087
DOI:10.1007/s10725-023-01064-3