Epigenetic Regulation of Phase Transitions in Arabidopsis thaliana

AbstractAdapting to the everchanging environment is key to a successful life for an organism. Eukaryotes reprogram their transcriptome in order to adapt to an unfavorable environment. To achieve this reprogramming, plants and animals employ multiple responses including epigenetic regulation. In the search for mutations compromised in high ambient temperature response, we found that VIL1, a PHD finger protein displays aberrant development at high temperature. RNA-seq analysis shows that vil1 fails to downregulate heat suppressed genes. H2A.Z ChIP-seq showed that unlike wild type, vil1 fails to evict H2A.Z from heat responsive genes. We also found that vil1 suppresses constitutive thermo-morphogenic phenotype of arp6. Supporting this phenotype, RNA-seq analysis revealed that constitutive heat responsive transcriptome of arp6 reverted back to the wild-type levels in arp6vil1. This observation suggests an antagonistic relationship between VIL1 and ARP6. We found that this antagonism can be explained in part by interaction between H3K27me3 and H2A.Z.

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Arabidopsis thaliana Uncoupling Proteins (AtUCPs): insights into gene expression during development and stress response and epigenetic regulation

Journal of Bioenergetics and Biomembranes ◽

10.1007/s10863-011-9336-9 ◽

2011 ◽

Vol 43 (1) ◽

pp. 71-79 ◽

Cited By ~ 16

Author(s):

Fábio Tebaldi Silveira Nogueira ◽

Flávio Tetsuo Sassaki ◽

Ivan G. Maia

Keyword(s):

Gene Expression ◽

Arabidopsis Thaliana ◽

Stress Response ◽

Epigenetic Regulation ◽

Uncoupling Proteins

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Effects of COR6.6 and COR15am Polypeptides Encoded by COR (Cold-Regulated) Genes of Arabidopsis thaliana on Dehydration-Induced Phase Transitions of Phospholipid Membranes

PLANT PHYSIOLOGY ◽

10.1104/pp.111.1.301 ◽

1996 ◽

Vol 111 (1) ◽

pp. 301-312 ◽

Cited By ~ 22

Author(s):

M. S. Webb ◽

S. J. Gilmour ◽

M. F. Thomashow ◽

P. L. Steponkus

Keyword(s):

Arabidopsis Thaliana ◽

Phase Transitions ◽

Phospholipid Membranes

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Nitrogen control of developmental phase transitions in Arabidopsis thaliana

Journal of Experimental Botany ◽

10.1093/jxb/eru326 ◽

2014 ◽

Vol 65 (19) ◽

pp. 5611-5618 ◽

Cited By ~ 45

Author(s):

E. A. Vidal ◽

T. C. Moyano ◽

J. Canales ◽

R. A. Gutierrez

Keyword(s):

Arabidopsis Thaliana ◽

Phase Transitions ◽

Developmental Phase ◽

Nitrogen Control

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Epigenetic regulation of intragenic transposable elements impacts gene transcription in Arabidopsis thaliana

Nucleic Acids Research ◽

10.1093/nar/gkv258 ◽

2015 ◽

Vol 43 (8) ◽

pp. 3911-3921 ◽

Cited By ~ 56

Author(s):

Tu N. Le ◽

Yuji Miyazaki ◽

Shohei Takuno ◽

Hidetoshi Saze

Keyword(s):

Arabidopsis Thaliana ◽

Transposable Elements ◽

Gene Transcription ◽

Epigenetic Regulation

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Electron Microscopy of Graphite Intercalation Compounds

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100055564 ◽

1982 ◽

Vol 40 ◽

pp. 544-545

Author(s):

G. Timp ◽

L. Salamanca-Riba ◽

L.W. Hobbs ◽

G. Dresselhaus ◽

M.S. Dresselhaus

Keyword(s):

Electron Microscopy ◽

Phase Transitions ◽

Domain Wall ◽

Intercalation Compounds ◽

Lattice Plane ◽

Wall Model ◽

Graphite Intercalation Compounds ◽

Fundamental Symmetry ◽

Graphite Intercalation

Electron microscopy can be used to study structures and phase transitions occurring in graphite intercalations compounds. The fundamental symmetry in graphite intercalation compounds is the staging periodicity whereby each intercalate layer is separated by n graphite layers, n denoting the stage index. The currently accepted model for intercalation proposed by Herold and Daumas assumes that the sample contains equal amounts of intercalant between any two graphite layers and staged regions are confined to domains. Specifically, in a stage 2 compound, the Herold-Daumas domain wall model predicts a pleated lattice plane structure.

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Multiple phase transitions investigated by high-speed TEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100175880 ◽

1990 ◽

Vol 48 (4) ◽

pp. 550-551

Author(s):

Oleg Bostanjoglo ◽

Peter Thomsen-Schmidt

Keyword(s):

Phase Transitions ◽

High Speed ◽

Short Exposure ◽

Semiconductor Film ◽

Time Resolved ◽

Short Exposure Time ◽

Multiple Phase ◽

Model Substance ◽

History Of ◽

Electron Image

Thin GexTe1-x (x = 0.15-0.8) were studied as a model substance of a composite semiconductor film, in addition being of interest for optical storage material. Two complementary modes of time-resolved TEM were used to trace the phase transitions, induced by an attached Q-switched (50 ns FWHM) and frequency doubled (532 nm) Nd:YAG laser. The laser radiation was focused onto the specimen within the TEM to a 20 μm spot (FWHM). Discrete intermediate states were visualized by short-exposure time doubleframe imaging /1,2/. The full history of a transformation was gained by tracking the electron image intensity with photomultiplier and storage oscilloscopes (space/time resolution 100 nm/3 ns) /3/. In order to avoid radiation damage by the probing electron beam to detector and specimen, the beam is pulsed in this continuous mode of time-resolved TEM,too.Short events ( <2 μs) are followed by illuminating with an extended single electron pulse (fig. 1c)

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