The characterization of tocols in different plants parts of six Japanese rice cultivars relating to their UVB-sensitivity

There has been significant interest in the photosensitivity, or photo-resistance, of Japanese rice cultivars, which synthesize tocols (Vitamin E), a class of phytochemicals including tocol derivatives tocopherol (T) and tocotrienol (T3). In the present study, the distribution of tocols in the leaves...

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Bibliographic Details
Published in:Plant physiology and biochemistry 2021-04, Vol.161, p.48-53
Main Authors: Nguyen Huynh Phuong, Uyen, Pham Thi Phuong, Thao, Imamura, Kiyoshi, Kitaya, Yoshiaki, Hidema, Jun, Furuta, Masakazu, Yasuaki, Maeda
Format: Article
Language:English
Subjects:
Japan
Oryza
Photosensitivity
Rice
Seeds
Tocols
Tocopherols
Tocotrienols
UVB-Sensitivity index
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Summary:There has been significant interest in the photosensitivity, or photo-resistance, of Japanese rice cultivars, which synthesize tocols (Vitamin E), a class of phytochemicals including tocol derivatives tocopherol (T) and tocotrienol (T3). In the present study, the distribution of tocols in the leaves, seeds, stems, and roots of six Japanese rice cultivars was investigated. The relationship between the different tocols in cultivars and their ultraviolet B sensitivity index (USB–SI) was analyzed. The leaves contained the highest average total amount of tocols at 230 μg.fresh-g−1, followed by seeds, stems, and roots. In leaves and stems, the most abundant component was α-T which was more than 85%. On the other hand, the tocols in seeds were 38% δ-T3, 32% α-T, and 20% α-T3. The tocols in roots were 55% α-T, 14% γ-T, and 13% δ-T3. The total tocol content in four plant parts exhibited a negative correlation (P 85%).•In seeds, T3 components of α-T3 and γ-T3 were increased to 20% and 38%.•The tocols of the cultivars in four parts were negatively correlated with UBV-SI
ISSN:0981-9428
1873-2690
DOI:10.1016/j.plaphy.2021.01.045