PMID- 27716066
OWN - NLM
STAT- MEDLINE
DCOM- 20170922
LR  - 20240326
IS  - 1471-2229 (Electronic)
IS  - 1471-2229 (Linking)
VI  - 16
IP  - 1
DP  - 2016 Oct 4
TI  - Maize plants can enter a standby mode to cope with chilling stress.
PG  - 212
LID - 212
AB  - BACKGROUND: European Flint maize inbred lines are used as a source of adaptation 
      to cold in most breeding programs in Northern Europe. A deep understanding of 
      their adaptation strategy could thus provide valuable clues for further 
      improvement, which is required in the current context of climate change. We 
      therefore compared six inbreds and two derived Flint x Dent hybrids for their 
      response to one-week at low temperature (10  degrees C day/7 or 4  degrees C night) during 
      steady-state vegetative growth. RESULTS: Leaf growth was arrested during chilling 
      treatment but recovered fast upon return to warm temperature, so that no negative 
      effect on shoot biomass was measured. Gene expression analyses of the emerging 
      leaf in the hybrids suggest that plants maintained a 'ready-to-grow' state during 
      chilling since cell cycle genes were not differentially expressed in the division 
      zone and genes coding for expansins were on the opposite up-regulated in the 
      elongation zone. In photosynthetic tissues, a strong reduction in PSII efficiency 
      was measured. Chilling repressed chlorophyll biosynthesis; we detected 
      accumulation of the precursor geranylgeranyl chlorophyll a and down-regulation of 
      GERANYLGERANYL REDUCTASE (GGR) in mature leaf tissues. Excess light energy was 
      mostly dissipated through fluorescence and constitutive thermal dissipation 
      processes, rather than by light-regulated thermal dissipation. Consistently, only 
      weak clues of xanthophyll cycle activation were found. CO(2) assimilation was 
      reduced by chilling, as well as the expression levels of genes encoding 
      phosphoenolpyruvate carboxylase (PEPC), pyruvate orthophosphate dikinase (PPDK), 
      and the small subunit of Rubisco. Accumulation of sugars was correlated with a 
      strong decrease of the specific leaf area (SLA). CONCLUSIONS: Altogether, our 
      study reveals good tolerance of the photosynthetic machinery of Northern European 
      maize to chilling and suggests that growth arrest might be their strategy for 
      fast recovery after a mild stress.
FAU - Riva-Roveda, Laetitia
AU  - Riva-Roveda L
AD  - Arvalis - Institut du Vegetal, Service Genetique, Physiologie et Protection des 
      Plantes, Chemin de Pau 21, F-64121, Montardon, France.
AD  - UMR SADV, INRA, Universite de Lille 1 Sciences et Technologies, F-80203, 
      Estrees-Mons, France.
AD  - InBioS, PhytoSYSTEMS, Laboratory of Plant Physiology, University of Liege, Sart 
      Tilman Campus Quartier Vallee 1, Chemin de la Vallee 4, B-4000, Liege, Belgium.
FAU - Escale, Brigitte
AU  - Escale B
AD  - Arvalis - Institut du Vegetal, Service Genetique, Physiologie et Protection des 
      Plantes, Chemin de Pau 21, F-64121, Montardon, France.
FAU - Giauffret, Catherine
AU  - Giauffret C
AD  - UMR SADV, INRA, Universite de Lille 1 Sciences et Technologies, F-80203, 
      Estrees-Mons, France.
AD  - UR AgroImpact, INRA, F-80203, Estrees-Mons, France.
FAU - Perilleux, Claire
AU  - Perilleux C
AUID- ORCID: 0000-0001-7653-2431
AD  - InBioS, PhytoSYSTEMS, Laboratory of Plant Physiology, University of Liege, Sart 
      Tilman Campus Quartier Vallee 1, Chemin de la Vallee 4, B-4000, Liege, Belgium. 
      cperilleux@ulg.ac.be.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20161004
PL  - England
TA  - BMC Plant Biol
JT  - BMC plant biology
JID - 100967807
SB  - IM
MH  - Adaptation, Physiological
MH  - *Cold Temperature
MH  - Plant Breeding
MH  - Plant Leaves/genetics/physiology
MH  - Stress, Physiological/*physiology
MH  - Zea mays/genetics/*physiology
PMC - PMC5050578
OTO - NOTNLM
OT  - Cold tolerance
OT  - Leaf growth
OT  - Maize (Zea mays)
OT  - Photoprotection
EDAT- 2016/10/08 06:00
MHDA- 2017/09/25 06:00
PMCR- 2016/10/04
CRDT- 2016/10/08 06:00
PHST- 2016/04/21 00:00 [received]
PHST- 2016/09/27 00:00 [accepted]
PHST- 2016/10/08 06:00 [entrez]
PHST- 2016/10/08 06:00 [pubmed]
PHST- 2017/09/25 06:00 [medline]
PHST- 2016/10/04 00:00 [pmc-release]
AID - 10.1186/s12870-016-0909-y [pii]
AID - 909 [pii]
AID - 10.1186/s12870-016-0909-y [doi]
PST - epublish
SO  - BMC Plant Biol. 2016 Oct 4;16(1):212. doi: 10.1186/s12870-016-0909-y.