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Fruit effect of exogenous application of calcium chloride in ‘Chandler’ commercial walnut orchards

Article number
1420_23
Pages
173 – 180
Language
English
Abstract
‘Chandler’ walnut orchards were tested for their fruit characteristics after foliar calcium chloride applications as calcium nutritional delivery scheme.
Treated fresh fruits were found to be heavier and dimensionally bigger in comparison to control.
Furthermore, analysing green husk weight and thickness, calcium chloride supplemented trees provide heavier green husks at the same tissue thickness.
No dimensional changes in walnut endocarp and kernel fresh weight were observed among treatments.
Quantitative free calcium analysis in husks, endocarp and kernel reveals lower husk free calcium levels in treated trees.
Data suggest that no major effect on commercial value of walnut kernel was added due to calcium chloride treatments; however, husk byproducts and waste production for circular economy purposes is enhanced.
Recorded lower free cellular Ca2+ concentrations on treated husks in conjunction to increased weights without thickness advancement potentially suggest an extensive signaling role for exogenous CaCl2 and/or calcium overfunctional management mediated from outer tissues of walnut fruits.

Publication
IX International Symposium on Walnut and Pecan
Authors
H. Kalorizou, P. Giannoulis
Keywords
calcium chloride, ‘Chandler’ walnuts, fruit size
Full text
https://doi.org/10.17660/ActaHortic.2025.1420.23
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