| HEJÁTKO, Jan, Hojin RYU, Gyung-Tae KIM, Romana DOBEŠOVÁ, Sunhwa CHOI, Sang Mi CHOI, Přemysl SOUČEK, Jakub HORÁK, Blanka PEKÁROVÁ, Klaus PALME, Břetislav BRZOBOHATÝ and Ildoo HWANG. The Histidine Kinases CYTOKININ-INDEPENDENT1 and ARABIDOPSIS HISTIDINE KINASE2 and 3 Regulate Vascular Tissue Development in Arabidopsis Shoots. Plant Cell. United States: AMER SOC PLANT BIOLOGISTS, 2009, vol. 21, No 7, p. 2008-2021. ISSN 1040-4651. |
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@article{850875,
author = {Hejátko, Jan and Ryu, Hojin and Kim, GyungandTae and Dobešová, Romana and Choi, Sunhwa and Choi, Sang Mi and Souček, Přemysl and Horák, Jakub and Pekárová, Blanka and Palme, Klaus and Brzobohatý, Břetislav and Hwang, Ildoo},
article_location = {United States},
article_number = {7},
keywords = {Histidine kinases CKI1},
language = {eng},
issn = {1040-4651},
journal = {Plant Cell},
title = {The Histidine Kinases CYTOKININ-INDEPENDENT1 and ARABIDOPSIS HISTIDINE KINASE2 and 3 Regulate Vascular Tissue Development in Arabidopsis Shoots},
volume = {21},
year = {2009}
}
TY - JOUR
ID - 850875
AU - Hejátko, Jan - Ryu, Hojin - Kim, Gyung-Tae - Dobešová, Romana - Choi, Sunhwa - Choi, Sang Mi - Souček, Přemysl - Horák, Jakub - Pekárová, Blanka - Palme, Klaus - Brzobohatý, Břetislav - Hwang, Ildoo
PY - 2009
TI - The Histidine Kinases CYTOKININ-INDEPENDENT1 and ARABIDOPSIS HISTIDINE KINASE2 and 3 Regulate Vascular Tissue Development in Arabidopsis Shoots
JF - Plant Cell
VL - 21
IS - 7
SP - 2008-2021
EP - 2008-2021
PB - AMER SOC PLANT BIOLOGISTS
SN - 10404651
KW - Histidine kinases CKI1
N2 - The development and activity of the procambium and cambium, which ensure vascular tissue formation, is critical for overall plant architecture and growth. However, little is known about the molecular factors affecting the activity of vascular meristems and vascular tissue formation. Here we show that the sensor histidine kinase CKI1 and the cytokinin receptors AHK2 and AHK3 are important regulators of vascular tissue development in Arabidopsis shoots. Genetic modifications of CKI1 activity in Arabidopsis causes dysfunction of the two-component signaling pathway and defects in procambial cell maintenance and/or identity. CKI1 overexpression in protoplasts leads to cytokinin-independent activation of the two-component phosphorelay, and intracellular domains are responsible for cytokinin-independent activity of CKI1. CKI1 expression is restricted to vascular tissues in inflorescence stems, and CKI1 forms homodimers both in vitro and in planta. Loss-of-function ahk2 and ahk3 mutants and plants with reduced levels of endogenous cytokinins show defects in procambium proliferation and an absence of secondary growth. These results indicate that the cytokinin-independent activity of CKI1 and cytokinin-induced AHK2 and AHK3 are important for vascular bundle formation and biomass production in Arabidopsis.
ER -
HEJÁTKO, Jan, Hojin RYU, Gyung-Tae KIM, Romana DOBEŠOVÁ, Sunhwa CHOI, Sang Mi CHOI, Přemysl SOUČEK, Jakub HORÁK, Blanka PEKÁROVÁ, Klaus PALME, Břetislav BRZOBOHATÝ and Ildoo HWANG. The Histidine Kinases CYTOKININ-INDEPENDENT1 and ARABIDOPSIS HISTIDINE KINASE2 and 3 Regulate Vascular Tissue Development in Arabidopsis Shoots. \textit{Plant Cell}. United States: AMER SOC PLANT BIOLOGISTS, 2009, vol.~21, No~7, p.~2008-2021. ISSN~1040-4651.
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