Roots of Hydroponically Grown Tea (Camellia sinensis) Plants as a Source of a Unique Amino Acid, Theanine
Kieko Saito, Kenji Furue, Hideki Kametani, Masahiko Ikeda
Journal of Experimental Agriculture International · pp. 125–129 · Published 28 Oct 2013
10.9734/AJEA/2014/5122Abstract
The beneficial effects of green tea are well documented. However, most research has reported the effects of green tea brewed solely from leaves or leaf extracts. We focused on tea roots and developed a hydroponic system to explore the effect on roots that biosynthesize one of the rarest functional amino acids, theanine. The level of theanine in tea roots was much higher than in leaves, which was analyzed using HPLC. Moreover, a higher level of theanine was detected in white rootlets than in lignified roots. Thus, tea roots cultured hydroponically in a controlled environment might be considered a natural drug containing theanine, which could lead to synergistic effects with other ingredients of the root. This novel medicinal material from the roots demonstrates a significant medical function for tea that extends beyond its leaves
Cited by 3
H. Atherton, Po-Min Li · Horticulturae · 2023
Kieko Saito, Yoriyuki Nakamura · European Journal of Medicinal Plants · 2022
Kieko Saito, Rieko Nagahashi, M. Ikeda · 2016
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