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ID 114990
著者
Tanaka, Akihito Tokushima Agriculture, Forestry, and Fisheries Technology Support Center
Yoshihara, Hitoshi Tokushima Agriculture, Forestry, and Fisheries Technology Support Center
Murai, Koji Tokushima Agriculture, Forestry, and Fisheries Technology Support Center
キーワード
Polygonum tinctorium
Plant factory
Blue LED
Photoperiod
Flowering
Indican
資料タイプ
学術雑誌論文
抄録
The photoperiod is a day-length-dependent seasonal change of physiological or developmental activities, such as flowering, in many plant species. Polygonum tinctorium (P. tinctorium) is an important industrial crop producing indigo blue dyes, and indican is an important substance as a precursor of indigo. Here, we report the day-length-dependent responses of growth, flowering, and indican synthesis in P. tinctorium. Indigo plants were grown in a hydroponic system under artificial light conditions in a completely-controlled plant factory. The growth parameters and indican content of leaves were measured and compared. Certain growth parameters (such as fresh weight and number of leaves) under 24-h continuous irradiation were significantly higher than those under other day-length conditions. Under 12-h photoperiod conditions, the flowering rate of plants with blue LED treatment increased six-fold compared with fluorescent white light treatment, while none of the plants flowered with red LED treatment. In the leaves, the relative expression levels of Pt’IGS and Pt’BGL were significantly higher in newer leaves compared to older ones. Indican content was greatly enhanced by blue light under 24-h continuous irradiation, which was reflected by increased expression levels of Pt’IGS. These findings demonstrate that there is a new regulatory mechanism for the indican synthesis pathway through blue light signalling. Blue light provides feasible strategy for artificially regulating indicant synthesis and flowering in P. tinctorium.
掲載誌名
Industrial Crops and Products
ISSN
09266690
cat書誌ID
AA10931448
AA11533881
出版者
Elsevier
155
開始ページ
112774
発行日
2020-07-19
権利情報
© 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
EDB ID
出版社版DOI
出版社版URL
フルテキストファイル
言語
eng
著者版フラグ
著者版
部局
生物資源系