Results 71 to 80 of about 1,523,037 (192)

Metabolism in Sync: The Circadian Clock, a Central Hub for Light-Driven Chloroplastic and Mitochondrial Entrainment

open access: yesPlants
Plants align their physiology with daily environmental cycles through the circadian clock, which integrates light and metabolic signals to optimize growth and stress responses.
Luis Cervela-Cardona   +2 more
doaj   +1 more source

An integrated genetic, genomic and systems approach defines gene networks regulated by the interaction of light and carbon signaling pathways in Arabidopsis [PDF]

open access: yes, 2008
Background: Light and carbon are two important interacting signals affecting plant growth and development. The mechanism(s) and/or genes involved in sensing and/or mediating the signaling pathways involving these interactions are unknown.
Karen E Thum   +7 more
core   +2 more sources

Ion channels: structural basis for function and disease. [PDF]

open access: yes, 1996
Ion channels are ubiquitous proteins that mediate nervous and muscular function, rapid transmembrane signaling events, and ionic and fluid balance. The cloning of genes encoding ion channels has led to major strides in understanding the mechanistic basis
Goldstein, SA
core   +1 more source

Beyond Light: Insights Into the Role of Constitutively Photomorphogenic1 in Plant Hormonal Signaling

open access: yesFrontiers in Plant Science, 2019
Light is an important environmental factor with profound effects in plant growth and development. Constitutively photomorphogenic1 (COP1) is a vital component of the light signaling pathway as a negative regulator of photomorphogenesis. Although the role
Wenjing Wang   +6 more
doaj   +1 more source

Regulatory mechanism of a light-dependent protochlorophyllide oxidoreductase in chlorophyll biosynthesis and environmental adaptation

open access: yesTechnology in Agronomy
Chlorophyll is a vital component of photosynthesis and must be produced throughout the plant life cycle. Light-dependent protochlorophyllide oxidoreductase (LPOR) is a pivotal enzyme in the chlorophyll biosynthesis pathway, catalyzing the conversion of ...
Qi Wang   +7 more
doaj   +1 more source

Sphingolipids as emerging mediators in retina degeneration [PDF]

open access: yes, 2019
The sphingolipids ceramide (Cer), sphingosine-1-phosphate (S1P), sphingosine (Sph), and ceramide-1-phosphate (C1P) are key signaling molecules that regulate major cellular functions.
Prado Spalm, Facundo Heber   +3 more
core   +1 more source

Distinct mechanisms of Drosophila CRYPTOCHROME-mediated light-evoked membrane depolarization and in vivo clock resetting. [PDF]

open access: yes, 2019
Drosophila CRYPTOCHROME (dCRY) mediates electrophysiological depolarization and circadian clock resetting in response to blue or ultraviolet (UV) light.
Au, David D   +5 more
core   +1 more source

A Simple Cell Model with Multiple Spatial Frequency Selectivity and Linear/Non-Linear Response Properties [PDF]

open access: yes, 1994
A model is described for cortical simple cells. Simple cells are selective for local contrast polarity, signaling light-dark and dark-light transitions. The proposed new architecture exhibits both linear and non-linear properties of simple cells.
Neumann, Heiko, Pessoa, Luiz
core   +1 more source

Quantum tunneling time

open access: yes, 2004
A simple model of a quantum clock is applied to the old and controversial problem of how long a particle takes to tunnel through a quantum barrier. The model I employ has the advantage of yielding sensible results for energy eigenstates, and does not ...
Kwek, L.C.   +3 more
core   +1 more source

The protein phosphatase 7 regulates phytochrome signaling in Arabidopsis.

open access: yesPLoS ONE, 2008
The psi2 mutant of Arabidopsis displays amplification of the responses controlled by the red/far red light photoreceptors phytochrome A (phyA) and phytochrome B (phyB) but no apparent defect in blue light perception.
Thierry Genoud   +5 more
doaj   +1 more source

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