TY  - JOUR
A1  - Wu, Anhui
A1  - Allu, Annapurna Devi
A1  - Garapati, Prashanth
A1  - Siddiqui, Hamad
A1  - Dortay, Hakan
A1  - Zanor, Maria-Ines
A1  - Asensi-Fabado, Maria Amparo
A1  - Munne-Bosch, Sergi
A1  - Antonio, Carla
A1  - Tohge, Takayuki
A1  - Fernie, Alisdair R.
A1  - Kaufmann, Kerstin
A1  - Xue, Gang-Ping
A1  - Müller-Röber, Bernd
A1  - Balazadeh, Salma
T1  - Jungbrunnen1, a reactive oxygen species-responsive NAC transcription factor, regulates longevity in arabidopsis
T2  - The plant cell
N2  - The transition from juvenility through maturation to senescence is a complex process that involves the regulation of longevity. Here, we identify JUNGBRUNNEN1 (JUB1), a hydrogen peroxide (H2O2)-induced NAC transcription factor, as a central longevity regulator in Arabidopsis thaliana. JUB1 overexpression strongly delays senescence, dampens intracellular H2O2 levels, and enhances tolerance to various abiotic stresses, whereas in jub1-1 knockdown plants, precocious senescence and lowered abiotic stress tolerance are observed. A JUB1 binding site containing a RRYGCCGT core sequence is present in the promoter of DREB2A, which plays an important role in abiotic stress responses. JUB1 transactivates DREB2A expression in mesophyll cell protoplasts and transgenic plants and binds directly to the DREB2A promoter. Transcriptome profiling of JUB1 overexpressors revealed elevated expression of several reactive oxygen species-responsive genes, including heat shock protein and glutathione S-transferase genes, whose expression is further induced by H2O2 treatment. Metabolite profiling identified elevated Pro and trehalose levels in JUB1 overexpressors, in accordance with their enhanced abiotic stress tolerance. We suggest that JUB1 constitutes a central regulator of a finely tuned control system that modulates cellular H2O2 level and primes the plants for upcoming stress through a gene regulatory network that involves DREB2A.
Y1  - 2012
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/36141
SN  - 1040-4651
VL  - 24
IS  - 2
SP  - 482
EP  - 506
PB  - American Society of Plant Physiologists
CY  - Rockville
ER  -