Energy transfer processes inRhodopseudomonas palustrisgrown under low-light conditions
نویسندگان
چکیده
منابع مشابه
Coherent Energy Transfer under Incoherent Light Conditions.
Recent two-dimensional electronic spectroscopy (2DES) experiments have reported evidence of coherent dynamics of electronic excitations in several light-harvesting antennae. However, 2DES uses ultrafast coherent laser pulses as an excitation source; therefore, there is a current debate on whether coherent excitation dynamics is present under natural sunlight - incoherent - illumination conditio...
متن کاملCOP1/SPA ubiquitin ligase complexes repress anthocyanin accumulation under low light and high light conditions
In Arabidopsis and many other plant species, anthocyanin pigments accumulate only after light exposure and not in darkness. Excess light of very high fluence rates leads to a further, very strong increase in anthocyanin levels. How excess light is sensed is not well understood. Here, we show that mutations in the key repressor of light signaling, the COP1/SPA complex, cause a strong hyperaccumu...
متن کاملLight energy allocation at PSII under field light conditions: how much energy is lost in NPQ-associated dissipation?
In the field, plants are exposed to fluctuating light, where photosynthesis occurs under conditions far from a steady state. Excess energy dissipation associated with energy quenching of chlorophyll fluorescence (qE) functions as an efficient photo-protection mechanism in photosystem II. PsbS is an important regulator of qE, especially for the induction phase of qE. Beside the regulatory energy...
متن کاملTracking facial features using low resolution and low fps cameras under variable light conditions
We are working on a system aimed at semi automatic reconstruction of real faces using stereo images. This project deals with tracking of user’s head and face movements. The information about position of face and its features will be later used in 3D reconstruction of features using epipolar geometry. The advantage of our approach is that we don’t use color information to find the feature points...
متن کاملTracking energy transfer between light harvesting complex 2 and 1 in photosynthetic membranes grown under high and low illumination.
Energy transfer (ET) between B850 and B875 molecules in light harvesting complexes LH2 and LH1/RC (reaction center) complexes has been investigated in membranes of Rhodopseudomonas palustris grown under high- and low-light conditions. In these bacteria, illumination intensity during growth strongly affects the type of LH2 complexes synthesized, their optical spectra, and their amount of energet...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: FEBS Letters
سال: 1993
ISSN: 0014-5793
DOI: 10.1016/0014-5793(93)80245-p