Instruct: Identify the main category of Biorxiv papers based on the titles and abstracts
Query: The quantitative contribution of different Photosystem II compartments to non-photochemical quenching in Arabidopsis Excess excitation energy in the light-harvesting antenna of Photosystem II (PSII) can cause irreversible damage to the photosynthetic apparatus. In periods of high light intensity, a feedback mechanism known as non-photochemical quenching (NPQ), induces the formation of quenchers which can safely dissipate excess excitation energy as heat. Although quenchers have been identified in more than one compartment of the PSII supercomplex, there is currently no quantitative description of how much NPQ is occurring at each of these locations. Here, we perform time-resolved fluorescence measurements on WT and antenna mutants lacking LHCII (NoL) and all peripheral antenna (Ch1 and Ch1lhcb5). By combining the results with those of steady-state fluorescence experiments we are able to estimate the intrinsic rate of NPQ for each plant and each PSII compartment. It is concluded that 60-70% of quenching occurs in LHCII, 15-20% in the minor antenna and 15-20% in the PSII core.
29
The categories of this paper are: education
18
The categories of this paper are: systems
12
The categories of this paper are: behavior
21
The categories of this paper are: toxicology
32
The categories of this paper are: zoology
0
The categories of this paper are: genetics
14
The categories of this paper are: biophysics
25
The categories of this paper are: bioengineering
24
The categories of this paper are: cancer
22
The categories of this paper are: physiology
20
The categories of this paper are: pharmacology
17
The categories of this paper are: molecular
28
The categories of this paper are: communication
31
The categories of this paper are: paleontology
16
The categories of this paper are: microbiology
13
The categories of this paper are: animal