Establishment of a cultivation method for leaf lettuce (Lactuca sativa var. crispa) and komatsuna (Brassica rapa var. perviridis) with high zinc content for patients with zinc deficiency and evaluation of its effectiveness.

Journal of the Science of Food and Agriculture
Ogawa AtsushiToyofuku Kyoko

Abstract

Insufficient intake of zinc is associated with various diseases worldwide. To overcome this problem, we aimed to establish a method for cultivating leafy vegetables with high zinc content in hydroponics without inhibiting their growth. Furthermore, we evaluated the effectiveness of the cultivated leafy vegetables with high zinc content in zinc-deficient mice. By adjusting the zinc concentration in the hydroponic solution to 5 mg L-1 starting from 7 days before harvesting, the zinc content in leaf lettuce increased eight times of that in the control, without any inhibition of the growth. Furthermore, when oxidized glutathione (GSSG) was added simultaneously with zinc to the hydroponic solution, the zinc content further doubled (16 times of that in the control). Similar results were obtained with komatsuna and red leaf lettuce, although there was a difference in the effect of GSSG treatment. The effectiveness of leafy vegetables with high zinc content in ameliorating zinc deficiency was evaluated by feeding lettuce with high zinc content to zinc-deficient mice. High zinc content lettuce significantly increased the zinc content in the liver, kidneys, gastrocnemius, and tibia of these mice. We established a cultivation method for l...Continue Reading

References

Aug 1, 1973·The Journal of Nutrition·A M Huber, S N Gershoff
Apr 29, 1998·Journal of the American College of Nutrition·A B Chausmer
Jan 24, 2004·Journal of Experimental Botany·Ross M Welch, Robin D Graham
Jan 31, 2006·The Proceedings of the Nutrition Society·Rosalind S Gibson
Feb 5, 2010·The Plant Journal : for Cell and Molecular Biology·Yasuhiro IshimaruNaoko K Nishizawa
May 28, 2019·Plant Science : an International Journal of Experimental Plant Biology·Arunee WongkaewNaoko Ohkama-Ohtsu
May 28, 2019·Plant Science : an International Journal of Experimental Plant Biology·Shin-Ichi NakamuraNaoko Ohkama-Ohtsu
Jul 23, 2019·Journal of Dermatological Science·Hideharu NakamuraSei-Ichiro Motegi

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