TY - JOUR
T1 - Involvement of STH7 in light-adapted development in Arabidopsis thaliana promoted by both strigolactone and karrikin
AU - Thussagunpanit, Jutiporn
AU - Nagai, Yuko
AU - Nagae, Miyu
AU - Mashiguchi, Kiyoshi
AU - Mitsuda, Nobutaka
AU - Ohme-Takagi, Masaru
AU - Nakano, Takeshi
AU - Nakamura, Hidemitsu
AU - Asami, Tadao
N1 - Funding Information:
This work was supported by CREST, JST, and JSPS KAKENHI [grant number 26440132]. This project was also funded by the Deanship of Scientific Research (DSR), at King Abdulaziz University, Jeddah, under [grant number 1-130-36-HiCi].
Publisher Copyright:
© 2016 Japan Society for Bioscience, Biotechnology, and Agrochemistry.
PY - 2017
Y1 - 2017
N2 - Strigolactones (SLs) and karrikins (KARs) regulate photomorphogenesis. GR24, a synthetic SL and KAR1, a KAR, inhibit the hypocotyl elongation of Arabidopsis thaliana in a weak light. GR24 and KAR1 up-regulate the expression of STH7, encoding a transcription factor belonging to the double B-box zinc finger subfamily. In this study, we used STH7-overexpressing (STH7ox) lines and functionally defective STH7 (STH7-SRDX) mutants to investigate roles of SLs and KARs in photomorphogenesis of Arabidopsis. Hypocotyl elongation of STH7-SRDX mutants was less sensitive to both GR24 and KAR1 treatment than that of wild-type Arabidopsis under weak light conditions. Furthermore, the chlorophyll and anthocyanin content was increased in STH7ox lines when de-etiolated with light and GR24-treated plants had enhanced anthocyanin production. GR24 and KAR1 treatment significantly increased the expression level of photosynthesis-related genes LHCB1 and rbcS. The results strongly suggest that SL and KAR induce photomorphogenesis of Arabidopsis in an STH7-dependent manner.
AB - Strigolactones (SLs) and karrikins (KARs) regulate photomorphogenesis. GR24, a synthetic SL and KAR1, a KAR, inhibit the hypocotyl elongation of Arabidopsis thaliana in a weak light. GR24 and KAR1 up-regulate the expression of STH7, encoding a transcription factor belonging to the double B-box zinc finger subfamily. In this study, we used STH7-overexpressing (STH7ox) lines and functionally defective STH7 (STH7-SRDX) mutants to investigate roles of SLs and KARs in photomorphogenesis of Arabidopsis. Hypocotyl elongation of STH7-SRDX mutants was less sensitive to both GR24 and KAR1 treatment than that of wild-type Arabidopsis under weak light conditions. Furthermore, the chlorophyll and anthocyanin content was increased in STH7ox lines when de-etiolated with light and GR24-treated plants had enhanced anthocyanin production. GR24 and KAR1 treatment significantly increased the expression level of photosynthesis-related genes LHCB1 and rbcS. The results strongly suggest that SL and KAR induce photomorphogenesis of Arabidopsis in an STH7-dependent manner.
KW - Arabidopsis thaliana
KW - Double B-box zinc finger
KW - Karrikin
KW - Photo-morphogenesis
KW - Strigolactone
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U2 - 10.1080/09168451.2016.1254536
DO - 10.1080/09168451.2016.1254536
M3 - Article
C2 - 27858514
AN - SCOPUS:85009766721
SN - 0916-8451
VL - 81
SP - 292
EP - 301
JO - Bioscience, Biotechnology and Biochemistry
JF - Bioscience, Biotechnology and Biochemistry
IS - 2
ER -