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@article{1474895,
author = {GigliandBisceglia, N. and Engelsdorf, T. and Strnad, M. and Vaahtera, L. and Khan, G.A. and Yamoune, Amel and Alipanah, L. and Novak, A. and Persson, S. and Hejátko, Jan and Hamann, T.},
article_location = {CAMBRIDGE},
article_number = {19},
doi = {http://dx.doi.org/10.1242/dev.166678},
keywords = {Cytokinin; Cell cycle; Cell wall integrity; Cell wall signaling; Cellulose biosynthesis; Nitrate reductase},
language = {eng},
issn = {0950-1991},
journal = {Development},
title = {Cell wall integrity modulates Arabidopsis thaliana cell cycle gene expression in a cytokinin- and nitrate reductase-dependent manner},
url = {http://dev.biologists.org/content/145/19/dev166678},
volume = {145},
year = {2018}
}
TY - JOUR
ID - 1474895
AU - Gigli-Bisceglia, N. - Engelsdorf, T. - Strnad, M. - Vaahtera, L. - Khan, G.A. - Yamoune, Amel - Alipanah, L. - Novak, A. - Persson, S. - Hejátko, Jan - Hamann, T.
PY - 2018
TI - Cell wall integrity modulates Arabidopsis thaliana cell cycle gene expression in a cytokinin- and nitrate reductase-dependent manner
JF - Development
VL - 145
IS - 19
SP - 166678
EP - 166678
PB - COMPANY BIOLOGISTS LTD
SN - 09501991
KW - Cytokinin
KW - Cell cycle
KW - Cell wall integrity
KW - Cell wall signaling
KW - Cellulose biosynthesis
KW - Nitrate reductase
UR - http://dev.biologists.org/content/145/19/dev166678
N2 - During plant growth and defense, cell cycle activity needs to be coordinated with cell wall integrity. Little is known about how this coordination is achieved. Here, we investigated coordination in Arabidopsis thaliana seedlings by studying the impact of cell wall damage (CWD, caused by cellulose biosynthesis inhibition) on cytokinin homeostasis, cell cycle gene expression and cell shape in root tips. CWD inhibited cell cycle gene expression and increased transition zone cell width in an osmosensitive manner. These results were correlated with CWD-induced, osmosensitive changes in cytokinin homeostasis. Expression of CYTOKININ OXIDASE/DEHYDROGENASE 2 and 3 (CKX2, CKX3), which encode cytokinin-degrading enzymes, was induced by CWD and reduced by osmoticum treatment. In nitrate reductase1 nitrate reductase2 (nia1 nia2) seedlings, CKX2 and CKX3 transcript levels were not increased and cell cycle gene expression was not repressed by CWD. Moreover, established CWD-induced responses, such as jasmonic acid, salicylic acid and lignin production, were also absent, implying a central role of NIA1/2-mediated processes in regulation of CWD responses. These results suggest that CWD enhances cytokinin degradation rates through a NIA1/2-mediated process, leading to attenuation of cell cycle gene expression.
ER -
GIGLI-BISCEGLIA, N., T. ENGELSDORF, M. STRNAD, L. VAAHTERA, G.A. KHAN, Amel YAMOUNE, L. ALIPANAH, A. NOVAK, S. PERSSON, Jan HEJÁTKO and T. HAMANN. Cell wall integrity modulates Arabidopsis thaliana cell cycle gene expression in a cytokinin- and nitrate reductase-dependent manner. \textit{Development}. CAMBRIDGE: COMPANY BIOLOGISTS LTD, 2018, vol.~145, No~19, p.~166678-166691. ISSN~0950-1991. Available from: https://dx.doi.org/10.1242/dev.166678.
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