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

Uyen Nguyen Huynh Phuong, Thao Pham Thi Phuong, Kiyoshi Imamura, Yoshiaki Kitaya, Jun Hidema, Masakazu Furuta, Maeda Yasuaki

Research output: Contribution to journalArticlepeer-review

Abstract

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 < 0.05) in stem and root, and a negative relationship (r < −0.70) with the UVB-SI of the cultivars, suggesting that the total tocol contents were closely related to the resistance to UVB in Japanese rice plants.

Original languageEnglish
Pages (from-to)48-53
Number of pages6
JournalPlant Physiology and Biochemistry
Volume161
DOIs
Publication statusPublished - 2021 Apr

Keywords

  • Photosensitivity
  • Rice
  • Tocols
  • UVB-Sensitivity index

ASJC Scopus subject areas

  • Physiology
  • Genetics
  • Plant Science

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