Detailed Information on Publication Record
2009
The Histidine Kinases CYTOKININ-INDEPENDENT1 and ARABIDOPSIS HISTIDINE KINASE2 and 3 Regulate Vascular Tissue Development in Arabidopsis Shoots
HEJÁTKO, Jan, Hojin RYU, Gyung-Tae KIM, Romana DOBEŠOVÁ, Sunhwa CHOI et. al.Basic information
Original name
The Histidine Kinases CYTOKININ-INDEPENDENT1 and ARABIDOPSIS HISTIDINE KINASE2 and 3 Regulate Vascular Tissue Development in Arabidopsis Shoots
Authors
HEJÁTKO, Jan (203 Czech Republic, guarantor), Hojin RYU (410 Republic of Korea), Gyung-Tae KIM (410 Republic of Korea), Romana DOBEŠOVÁ (203 Czech Republic), Sunhwa CHOI (410 Republic of Korea), Sang Mi CHOI (410 Republic of Korea), Přemysl SOUČEK (203 Czech Republic), Jakub HORÁK (203 Czech Republic), Blanka PEKÁROVÁ (203 Czech Republic), Klaus PALME (276 Germany), Břetislav BRZOBOHATÝ (203 Czech Republic) and Ildoo HWANG (410 Republic of Korea)
Edition
Plant Cell, United States, AMER SOC PLANT BIOLOGISTS, 2009, 1040-4651
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
Genetics and molecular biology
Country of publisher
United States of America
Confidentiality degree
není předmětem státního či obchodního tajemství
Impact factor
Impact factor: 9.293
RIV identification code
RIV/00216224:14310/09:00036886
Organization unit
Faculty of Science
UT WoS
000270415700011
Keywords (in Czech)
Histidine kinases CKI1
Keywords in English
Histidine kinases CKI1
Tags
International impact, Reviewed
Změněno: 9/4/2010 16:05, doc. RNDr. Jan Hejátko, Ph.D.
V originále
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.
In Czech
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.
Links
| LC06034, research and development project |
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| MSM0021622415, plan (intention) |
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