scholarly journals Role of ion-pair states in the predissociation dynamics of Rydberg states of molecular iodine

2016 ◽  
Vol 18 (28) ◽  
pp. 18896-18904 ◽  
Author(s):  
J. von Vangerow ◽  
A. S. Bogomolov ◽  
N. V. Dozmorov ◽  
D. Schomas ◽  
F. Stienkemeier ◽  
...  
Keyword(s):  
Imaging Spectroscopy ◽  
Rydberg States ◽  
Molecular Iodine ◽  
Ion Pair ◽  
Ion Imaging ◽  
Direct Control ◽  
Wavepacket Propagation

The predissociation dynamics of superexcited iodine is studied by femtosecond ion imaging spectroscopy, providing direct control of wavepacket propagation in ion-pair states.

Predissociation of high-lying Rydberg states of molecular iodine via ion-pair states

2014 ◽  
Vol 140 (12) ◽  
pp. 124311 ◽  
Author(s):  
Alexandr S. Bogomolov ◽  
Barbara Grüner ◽  
Sergei A. Kochubei ◽  
Marcel Mudrich ◽  
Alexey V. Baklanov
Keyword(s):  
Rydberg States ◽  
Molecular Iodine ◽  
Ion Pair

The role of Rydberg states in photoionization of NO2and (NO+, O−) ion pair formation induced by one VUV photon

2013 ◽  
Vol 139 (4) ◽  
pp. 044311 ◽  
Author(s):  
S. Marggi Poullain ◽  
K. Veyrinas ◽  
P. Billaud ◽  
M. Lebech ◽  
Y. J. Picard ◽  
...  
Keyword(s):  
Rydberg States ◽  
Ion Pair ◽  
Pair Formation ◽  
Ion Pair Formation

The role of high Rydberg states in enhanced O-formation in a pulsed O2discharge

1999 ◽  
Vol 8 (3) ◽  
pp. 384-391 ◽  
Author(s):  
W X Ding ◽  
L A Pinnaduwage ◽  
C Tav ◽  
D L McCorkle
Keyword(s):  
Rydberg States

scholarly journals Dawn and photoperiod sensing by phytochrome A

2018 ◽  
Author(s):  
Daniel D Seaton ◽  
Gabriela Toledo-Ortiz ◽  
Akane Kubota ◽  
Ashwin Ganpudi ◽  
Takato Imaizumi ◽  
...  
Keyword(s):  
Meta Analysis ◽  
Transcriptional Regulator ◽  
Functional Genomic ◽  
Sensitive Detector ◽  
Phytochrome A ◽  
Direct Control ◽  
Complex Regulation ◽  
Subsequent Activation ◽  
Seasonal Responses

AbstractIn plants, light receptors play a pivotal role in photoperiod sensing, enabling them to track seasonal progression. Photoperiod sensing arises from an interaction between the plant’s endogenous circadian oscillator and external light cues. Here, we characterise the role of phytochrome A (phyA) in photoperiod sensing. Our meta-analysis of functional genomic datasets identified phyA as a principal transcriptional regulator of morning-activated genes, specifically in short photoperiods. We demonstrate that PHYA expression is under the direct control of the PHYTOCHROME INTERACTING FACTOR transcription factors, PIF4 and PIF5. As a result, phyA protein accumulates during the night, especially in short photoperiods. At dawn phyA activation by light results in a burst of gene expression, with consequences for anthocyanin accumulation. The combination of complex regulation of PHYA transcript and the unique molecular properties of phyA protein make this pathway a sensitive detector of both dawn and photoperiod.Significance statementThe changing seasons subject plants to a variety of challenging environments. In order to deal with this, many plants have mechanisms for inferring the season by measuring the duration of daylight in a day. A number of well-known seasonal responses such as flowering are responsive to daylength or photoperiod. Here, we describe how the photoreceptor protein phytochrome A senses short photoperiods. This arises from its accumulation during long nights, as happens during winter, and subsequent activation by light at dawn. As a result of this response, the abundance of red anthocyanin pigments is increased in short photoperiods. Thus, we describe a mechanism underlying a novel seasonal phenotype in an important model plant species.

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