TY  - JOUR
A1  - Hilker, Monika
A1  - Schwachtje, Jens
A1  - Baier, Margarete
A1  - Balazadeh, Salma
A1  - Bäurle, Isabel
A1  - Geiselhardt, Sven
A1  - Hincha, Dirk K.
A1  - Kunze, Reinhard
A1  - Mueller-Roeber, Bernd
A1  - Rillig, Matthias G.
A1  - Rolff, Jens
A1  - Schmülling, Thomas
A1  - Steppuhn, Anke
A1  - van Dongen, Joost
A1  - Whitcomb, Sarah J.
A1  - Wurst, Susanne
A1  - Zuther, Ellen
A1  - Kopka, Joachim
T1  - Priming and memory of stress responses in organisms lacking a nervous system
JF  - Biological reviews
KW  - priming
KW  - stress signalling
KW  - epigenetics
KW  - memory
KW  - fitness
KW  - stress tolerance
KW  - defence
KW  - bet hedging
Y1  - 2016
U6  - https://doi.org/10.1111/brv.12215
SN  - 1464-7931
SN  - 1469-185X
VL  - 91
SP  - 1118
EP  - 1133
PB  - Wiley-Blackwell
CY  - Hoboken
ER  - 
TY  - JOUR
A1  - Allu, Annapurna Devi
A1  - Simancas, Barbara
A1  - Balazadeh, Salma
A1  - Munne-Bosch, Sergi
T1  - Defense-Related Transcriptional Reprogramming in Vitamin E-Deficient Arabidopsis Mutants Exposed to Contrasting Phosphate Availability
JF  - Frontiers in plant science
N2  - Vitamin E inhibits the propagation of lipid peroxidation and helps protecting photosystem II from photoinhibition, but little is known about its possible role in plant response to Pi availability. Here, we aimed at examining the effect of vitamin E deficiency in Arabidopsis thaliana vte mutants on phytohormone contents and the expression of transcription factors in plants exposed to contrasting Pi availability. Plants were subjected to two doses of Pi, either unprimed (controls) or previously exposed to low Pi (primed). In the wild type, alpha-tocopherol contents increased significantly in response to repeated periods of low Pi, which was paralleled by increased growth, indicative of a priming effect. This growth-stimulating effect was, however, abolished in vte mutants. Hormonal profiling revealed significant effects of Pi availability, priming and genotype on the contents of jasmonates and salicylates; remarkably, vte mutants showed enhanced accumulation of both hormones under low Pi. Furthermore, expression profiling of 1,880 transcription factors by qRT-PCR revealed a pronounced effect of priming on the transcript levels of 45 transcription factors mainly associated with growth and stress in wild-type plants in response to low Pi availability; while distinct differences in the transcriptional response were detected in vte mutants. We conclude that alpha-tocopherol plays a major role in the response of plants to Pi availability not only by protecting plants from photo-oxidative stress, but also by exerting a control over growth-and defense-related transcriptional reprogramming and hormonal modulation.
KW  - antioxidants
KW  - photosystem II
KW  - plastochromanol-8
KW  - priming
KW  - retrograde signaling
KW  - tocochromanols
KW  - vitamin E
Y1  - 2017
U6  - https://doi.org/10.3389/fpls.2017.01396
SN  - 1664-462X
VL  - 8
PB  - Frontiers Research Foundation
CY  - Lausanne
ER  - 
TY  - JOUR
A1  - Sedaghatmehr, Mastoureh
A1  - Thirumalaikumar, Venkatesh P.
A1  - Kamranfar, Iman
A1  - Marmagne, Anne
A1  - Masclaux-Daubresse, Celine
A1  - Balazadeh, Salma
T1  - A regulatory role of autophagy for resetting the memory of heat stress in plants
JF  - Plant, cell & environment : cell physiology, whole-plant physiology, community physiology
N2  - As sessile life forms, plants are repeatedly confronted with adverse environmental conditions, which can impair development, growth, and reproduction. During evolution, plants have established mechanisms to orchestrate the delicate balance between growth and stress tolerance, to reset cellular biochemistry once stress vanishes, or to keep a molecular memory, which enables survival of a harsher stress that may arise later. Although there are several examples of memory in diverse plants species, the molecular machinery underlying the formation, duration, and resetting of stress memories is largely unknown so far. We report here that autophagy, a central self-degradative process, assists in resetting cellular memory of heat stress (HS) in Arabidopsis thaliana. Autophagy is induced by thermopriming (moderate HS) and, intriguingly, remains high long after stress termination. We demonstrate that autophagy mediates the specific degradation of heat shock proteins at later stages of the thermorecovery phase leading to the accumulation of protein aggregates after the second HS and a compromised heat tolerance. Autophagy mutants retain heat shock proteins longer than wild type and concomitantly display improved thermomemory. Our findings reveal a novel regulatory mechanism for HS memory in plants.
KW  - Arabidopsis
KW  - heat shock proteins
KW  - priming
KW  - resetting
Y1  - 2019
U6  - https://doi.org/10.1111/pce.13426
SN  - 0140-7791
SN  - 1365-3040
VL  - 42
IS  - 3
SP  - 1054
EP  - 1064
PB  - Wiley
CY  - Hoboken
ER  -