TY  - JOUR
U1  - Wissenschaftlicher Artikel
A1  - Lawson, Patrick G.
A1  - Daum, Diemo
A1  - Czauderna, Roman
A1  - Vorsatz, Carsten
T1  - Factors influencing the efficacy of iodine foliar sprays usedfor biofortifying butterhead lettuce (Lactuca sativa)
JF  - Journal of Plant Nutrition and Soil Science
N2  - Iodine biofortification of butterhead lettuce (Lactuca sativa)viafoliar sprays was investigated infield trials, focusing on assessing the influence of the time and application method. The iodine (I)concentrations in the edible plant parts increased when potassium iodide (KI) and potassiumiodate (KIO3) solutions were sprayed at doses up to 0.25 kg I ha–1on different dates close to har-vest. Crop yield and marketable quality were not significantly affected by I treatments. A greaterefficacy of KI was frequently observed and probably related to its lower point of deliquescenceand smaller anion size in comparison with KIO3. KI sprays on butterhead lettuce at different timesof the day resulted in a higher I enrichment when applied at 11:00 and 15:00 h. The diurnal varia-tion in I uptake may reflect the impact of fluctuating climatic conditions at the time of application.Iodine treatments at different application dates near harvest led to an increasing I concentrationin the vegetable produce that could be related to the rising shoot fresh mass and leaf area.When KI and KIO3were sprayed simultaneously with commercial calcium fertilizers, fungicidesor insecticides, I accumulation in butterhead lettuce was not negatively affected or in some caseseven significantly enhanced. The results show that foliar sprays of KI and KIO3are an effectivemethod to biofortify butterhead lettuce with I and this approach may easily be implemented as aroutine method in commercial cultivation.
KW  - iodine biofortification
KW  - leafy vegetables
KW  - foliar sprays
KW  - application time and mode
Y1  - 2016
SN  - 1436-8730
SS  - 1436-8730
SN  - 1522-2624
SS  - 1522-2624
U6  - https://doi.org/10.1002/jpln.201600213
DO  - https://doi.org/10.1002/jpln.201600213
VL  - 179
IS  - 5
SP  - 661
EP  - 669
ER  -