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@article{1227690, author = {Smet, D. and Žádníková, P. and Vandenbussche, F. and Frimlová, Eva and Van Der Straeten, D.}, article_location = {HOBOKEN}, article_number = {4}, doi = {http://dx.doi.org/10.1111/nph.12751}, keywords = {apical hook; Arabidopsis thaliana; brassinosteroids (BRs); cross-talk; ethylene; infrared imaging; kinematics; light}, language = {eng}, issn = {0028-646X}, journal = {New Phytologist}, title = {Dynamic infrared imaging analysis of apical hook development in Arabidopsis: the case of brassinosteroids}, url = {http://onlinelibrary.wiley.com/doi/10.1111/nph.12751/epdf}, volume = {202}, year = {2014} }
TY - JOUR ID - 1227690 AU - Smet, D. - Žádníková, P. - Vandenbussche, F. - Frimlová, Eva - Van Der Straeten, D. PY - 2014 TI - Dynamic infrared imaging analysis of apical hook development in Arabidopsis: the case of brassinosteroids JF - New Phytologist VL - 202 IS - 4 SP - 1398-1411 EP - 1398-1411 PB - WILEY-BLACKWELL SN - 0028646X KW - apical hook KW - Arabidopsis thaliana KW - brassinosteroids (BRs) KW - cross-talk KW - ethylene KW - infrared imaging KW - kinematics KW - light UR - http://onlinelibrary.wiley.com/doi/10.1111/nph.12751/epdf L2 - http://onlinelibrary.wiley.com/doi/10.1111/nph.12751/epdf N2 - Germination of Arabidopsis seeds in darkness induces apical hook development, based on a tightly regulated differential growth coordinated by a multiple hormone cross-talk. Here, we endeavoured to clarify the function of brassinosteroids (BRs) and cross-talk with ethylene in hook development. An automated infrared imaging system was developed to study the kinetics of hook development in etiolated Arabidopsis seedlings. To ascertain the photomorphogenic control of hook opening, the system was equipped with an automatic light dimmer. We demonstrate that ethylene and BRs are indispensable for hook formation and maintenance. Ethylene regulation of hook formation functions partly through BRs, with BR feedback inhibition of ethylene action. Conversely, BR-mediated extension of hook maintenance functions partly through ethylene. Furthermore, we revealed that a short light pulse is sufficient to induce rapid hook opening. Our dynamic infrared imaging system allows high-resolution, kinetic imaging of up to 112 seedlings in a single experimental run. At this high throughput, it is ideally suited to rapidly gain insight in pathway networks. We demonstrate that BRs and ethylene cooperatively regulate apical hook development in a phase-dependent manner. Furthermore, we show that light is a predominant regulator of hook opening, inhibiting ethylene- and BR-mediated postponement of hook opening. ER -
SMET, D., P. ŽÁDNÍKOVÁ, F. VANDENBUSSCHE, Eva FRIMLOVÁ a D. VAN DER STRAETEN. Dynamic infrared imaging analysis of apical hook development in Arabidopsis: the case of brassinosteroids. \textit{New Phytologist}. HOBOKEN: WILEY-BLACKWELL, 2014, roč.~202, č.~4, s.~1398-1411. ISSN~0028-646X. Dostupné z: https://dx.doi.org/10.1111/nph.12751.
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