@article{f597639179ec4ae593188eaa8ba7abf2,
title = "Involvement of auxin dynamics in hypergravity-induced promotion of lignin-related gene expression in Arabidopsis inflorescence stems",
abstract = "Recent studies have shown that hypergravity enhances lignification through up-regulation of the expression of lignin biosynthesis-related genes, although its hormonal signalling mechanism is unknown. The effects of hypergravity on auxin dynamics were examined using Arabidopsis plants that were transformed with the auxin reporter gene construct DR5::GUS. Hypergravity treatment at 300g significantly increased β-glucuronidase activity in inflorescence stems of DR5::GUS plants, indicating that endogenous auxin accumulation was enhanced by hypergravity treatment. The hypergravity-related increased expression levels of both DR5::GUS and lignin biosynthesis-related genes in inflorescence stems were suppressed after disbudding, indicating that the increased expression of lignin biosynthesis-related genes is dependent on an increase in auxin influx from the shoot apex.",
keywords = "Arabidopsis, DR5::GUS, auxin, disbudding, hypergravity, lignin",
author = "Daisuke Tamaoki and Ichirou Karahara and Takumi Nishiuchi and Tatsuya Wakasugi and Kyoji Yamada and Seiichiro Kamisaka",
note = "Funding Information: We acknowledge Dr Thomas J. Guilfoyle of University of Missouri (Columbia, MO) for providing the DR5::GUS transgenic line. This work was supported fully by Research Fellowships of the Japan Society for the Promotion of Science for Young Scientists (to DT), by a Grant-in-aid for Scientific Research nos 21570064 and 21657011 from the Ministry of Education, Culture, Sports, Science and Technology of Japan (to IK), and {\textquoteleft}Ground-Based Research Announcement for Space Utilization{\textquoteright} funded by the Japan Space Forum (to SK and IK).",
year = "2011",
month = nov,
doi = "10.1093/jxb/err224",
language = "英語",
volume = "62",
pages = "5463--5469",
journal = "Journal of Experimental Botany",
issn = "0022-0957",
publisher = "Oxford University Press",
number = "15",
}